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International Isotopes Inc. – ‘10-K’ for 12/31/23 – ‘EX-101.SCH’

On:  Friday, 3/29/24, at 12:02pm ET   ·   For:  12/31/23   ·   Accession #:  1437749-24-10010   ·   File #:  0-22923

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  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 3/29/24  International Isotopes Inc.       10-K       12/31/23   81:8.7M                                   RDG Filings/FA

Annual Report   —   Form 10-K   —   SEA’34

Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 10-K        Annual Report                                       HTML   1.25M 
 2: EX-21.1     Subsidiaries List                                   HTML     24K 
 3: EX-23.1     Consent of Expert or Counsel                        HTML     22K 
 4: EX-31.1     Certification -- §302 - SOA'02                      HTML     27K 
 5: EX-31.2     Certification -- §302 - SOA'02                      HTML     27K 
 6: EX-32.1     Certification -- §906 - SOA'02                      HTML     25K 
 7: EX-32.2     Certification -- §906 - SOA'02                      HTML     25K 
13: R1          Document And Entity Information                     HTML     90K 
14: R2          Consolidated Balance Sheets                         HTML    155K 
15: R3          Consolidated Balance Sheets (Parentheticals)        HTML     32K 
16: R4          Consolidated Statements of Operations               HTML     92K 
17: R5          Consolidated Statement of Stockholders' Equity      HTML    101K 
18: R6          Consolidated Statements of Cash Flows               HTML    117K 
19: R7          Insider Trading Arrangements                        HTML     32K 
20: R8          Note 1 - Description of Business and Significant    HTML     64K 
                Accounting Policies                                              
21: R9          Note 2 - Business Condition and Liquidity           HTML     30K 
22: R10         Note 3 - Purchased Asset and Investments            HTML     26K 
23: R11         Note 4 - Inventories                                HTML     26K 
24: R12         Note 5 - Property, Plant and Equipment              HTML     38K 
25: R13         Note 6 - Patents and Other Intangible Assets        HTML     39K 
26: R14         Note 7 - Convertible Debentures and Notes Payable   HTML     56K 
27: R15         Note 8 - Lease Obligations                          HTML     55K 
28: R16         Note 9 - Shareholders' Equity, Redeemable           HTML     97K 
                Convertible Preferred Stock, Options and Warrants                
29: R17         Note 10 - Income Taxes                              HTML     45K 
30: R18         Note 11 - Commitments and Contingencies             HTML     34K 
31: R19         Note 12 - Asset Retirement Obligation               HTML     33K 
32: R20         Note 13 - Fair Value Measurements                   HTML     27K 
33: R21         Note 14 - Revenue Recognition                       HTML     55K 
34: R22         Note 15 - Segment Information                       HTML     76K 
35: R23         Note 16 - Subsequent Events                         HTML     30K 
36: R24         Significant Accounting Policies (Policies)          HTML    100K 
37: R25         Note 1 - Description of Business and Significant    HTML     39K 
                Accounting Policies (Tables)                                     
38: R26         Note 5 - Property, Plant and Equipment (Tables)     HTML     36K 
39: R27         Note 6 - Patents and Other Intangible Assets        HTML     38K 
                (Tables)                                                         
40: R28         Note 7 - Convertible Debentures and Notes Payable   HTML     46K 
                (Tables)                                                         
41: R29         Note 8 - Lease Obligations (Tables)                 HTML     54K 
42: R30         Note 9 - Shareholders' Equity, Redeemable           HTML     67K 
                Convertible Preferred Stock, Options and Warrants                
                (Tables)                                                         
43: R31         Note 10 - Income Taxes (Tables)                     HTML     41K 
44: R32         Note 12 - Asset Retirement Obligation (Tables)      HTML     30K 
45: R33         Note 14 - Revenue Recognition (Tables)              HTML     45K 
46: R34         Note 15 - Segment Information (Tables)              HTML     67K 
47: R35         Note 1 - Description of Business and Significant    HTML     59K 
                Accounting Policies (Details Textual)                            
48: R36         Note 1 - Description of Business and Significant    HTML     33K 
                Accounting Policies - Schedule of Weighted Average               
                Number of Shares (Details)                                       
49: R37         Note 1 - Description of Business and Significant    HTML     27K 
                Accounting Policies - Schedule of Common Stock                   
                Equivalents Outstanding (Details)                                
50: R38         Note 2 - Business Condition and Liquidity (Details  HTML     56K 
                Textual)                                                         
51: R39         Note 4 - Inventories (Details Textual)              HTML     24K 
52: R40         Note 5 - Property, Plant and Equipment (Details     HTML     24K 
                Textual)                                                         
53: R41         Note 5 - Property, Plant and Equipment - Schedule   HTML     46K 
                of Property, Plant and Equipment (Details)                       
54: R42         Note 6 - Patents and Other Intangible Assets        HTML     25K 
                (Details Textual)                                                
55: R43         Note 6 - Patents and Other Intangible Assets -      HTML     34K 
                Schedule of Intangible Assets (Details)                          
56: R44         Note 6 - Patents and Other Intangible Assets -      HTML     38K 
                Schedule of Future Amortization Expense (Details)                
57: R45         Note 7 - Convertible Debentures and Notes Payable   HTML     77K 
                (Details Textual)                                                
58: R46         Note 7 - Convertible Debentures and Notes Payable   HTML     41K 
                - Schedule of Long-term Debt Instruments (Details)               
59: R47         Note 7 - Convertible Debentures and Notes Payable   HTML     42K 
                - Schedule of Long-term Debt Instruments (Details)               
                (Parentheticals)                                                 
60: R48         Note 7 - Convertible Debentures and Notes Payable   HTML     39K 
                - Schedule of Maturities of Long-term Debt                       
                (Details)                                                        
61: R49         Note 8 - Lease Obligations - Lease Cost (Details)   HTML     50K 
62: R50         Note 8 - Lease Obligations - Schedule of Future     HTML     69K 
                Minimum Lease Payments (Details)                                 
63: R51         Note 9 - Shareholders' Equity, Redeemable           HTML    395K 
                Convertible Preferred Stock, Options and Warrants                
                (Details Textual)                                                
64: R52         Note 9 - Shareholders' Equity, Redeemable           HTML     37K 
                Convertible Preferred Stock, Options and Warrants                
                - Schedule of Warrant Activity (Details)                         
65: R53         Note 9 - Shareholders' Equity, Redeemable           HTML     61K 
                Convertible Preferred Stock, Options and Warrants                
                - Option Activity (Details)                                      
66: R54         Note 9 - Shareholders' Equity, Redeemable           HTML     45K 
                Convertible Preferred Stock, Options and Warrants                
                - Restricted Stock Units Activity (Details)                      
67: R55         Note 10 - Income Taxes (Details Textual)            HTML     37K 
68: R56         Note 10 - Income Taxes - Schedule of Effective      HTML     31K 
                Income Tax Rate Reconciliation (Details)                         
69: R57         Note 10 - Income Taxes - Schedule of Deferred Tax   HTML     33K 
                Assets and Liabilities (Details)                                 
70: R58         Note 11 - Commitments and Contingencies (Details    HTML     54K 
                Textual)                                                         
71: R59         Note 12 - Asset Retirement Obligation - Schedule    HTML     29K 
                of Asset Retirement Obligation Activity (Details)                
72: R60         Note 13 - Fair Value Measurements (Details          HTML     25K 
                Textual)                                                         
73: R61         Note 14 - Revenue Recognition (Details Textual)     HTML     26K 
74: R62         Note 14 - Revenue Recognition - Disaggregation of   HTML     46K 
                Revenue (Details)                                                
75: R63         Note 15 - Segment Information - Schedule of         HTML     75K 
                Segment Information by Segment (Details)                         
76: R64         Note 16 - Subsequent Events (Details Textual)       HTML     29K 
78: XML         IDEA XML File -- Filing Summary                      XML    151K 
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77: EXCEL       IDEA Workbook of Financial Report Info              XLSX    134K 
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80: ZIP         XBRL Zipped Folder -- 0001437749-24-010010-xbrl      Zip    865K 


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<xsd:element abstract="true" id="inis_ChiefExecutiveOfficerAndChairmanOfTheBoardMember" name="ChiefExecutiveOfficerAndChairmanOfTheBoardMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_ClassLWarrantsMember" name="ClassLWarrantsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_ClassMWarrantsMember" name="ClassMWarrantsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_ClassNWarrantsMember" name="ClassNWarrantsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_ClassOWarrantsMember" name="ClassOWarrantsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element id="inis_ClassOfWarrantOrRightExercisePriceExercised" name="ClassOfWarrantOrRightExercisePriceExercised" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType" xbrli:periodType="duration"/>
<xsd:element id="inis_ClassOfWarrantOrRightExercisePriceForfeited" name="ClassOfWarrantOrRightExercisePriceForfeited" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType" xbrli:periodType="duration"/>
<xsd:element id="inis_ClassOfWarrantOrRightExercisePriceGranted" name="ClassOfWarrantOrRightExercisePriceGranted" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType" xbrli:periodType="duration"/>
<xsd:element id="inis_ClassOfWarrantOrRightExercised" name="ClassOfWarrantOrRightExercised" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration"/>
<xsd:element id="inis_ClassOfWarrantOrRightForfeited" name="ClassOfWarrantOrRightForfeited" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration"/>
<xsd:element id="inis_ClassOfWarrantOrRightGranted" name="ClassOfWarrantOrRightGranted" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration"/>
<xsd:element id="inis_ClassOfWarrantsOrRightsExpirations" name="ClassOfWarrantsOrRightsExpirations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_CobaltProductsMember" name="CobaltProductsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element id="inis_CommonStockEquivalentsOutstanding" name="CommonStockEquivalentsOutstanding" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant"/>
<xsd:element id="inis_ContractTerm" name="ContractTerm" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_ContractWithTheDoeForTheIrradiationOfCobaltTargetsMember" name="ContractWithTheDoeForTheIrradiationOfCobaltTargetsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_ConversionOfConvertibleDebenturesIntoSeriesCPreferredStockAndWarrantsMember" name="ConversionOfConvertibleDebenturesIntoSeriesCPreferredStockAndWarrantsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_ConversionOfSeriesBPreferredStockIntoCommonStockMember" name="ConversionOfSeriesBPreferredStockIntoCommonStockMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_ConversionOfSeriesCPreferredStockIntoCommonStockMember" name="ConversionOfSeriesCPreferredStockIntoCommonStockMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_DocumentAndEntityInformation" name="DocumentAndEntityInformation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_DufPlantMember" name="DufPlantMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element id="inis_EffectiveIncomeTaxRateReconciliationBookAndTaxDifferencesAmount" name="EffectiveIncomeTaxRateReconciliationBookAndTaxDifferencesAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_EmployeeStockPurchasePlanMember" name="EmployeeStockPurchasePlanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element id="inis_EmploymentAgreementMinimumPricePerShare" name="EmploymentAgreementMinimumPricePerShare" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType" xbrli:periodType="instant"/>
<xsd:element abstract="true" id="inis_ExecutiveOfficersAndDirectorsMember" name="ExecutiveOfficersAndDirectorsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element id="inis_FinanceLeaseExpense" name="FinanceLeaseExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_FluorineProductsMember" name="FluorineProductsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element id="inis_IncreaseDecreaseInNetIncomeLoss" name="IncreaseDecreaseInNetIncomeLoss" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
<xsd:element abstract="true" id="inis_LandInLeaCountyNewMexicoMember" name="LandInLeaCountyNewMexicoMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element id="inis_LesseeLiabilityToBePaidMaturityTableTextBlock" name="LesseeLiabilityToBePaidMaturityTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
<xsd:element id="inis_LesseeOperatingLeasesAndFinanceLeasesTextBlock" name="LesseeOperatingLeasesAndFinanceLeasesTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
<xsd:element id="inis_LicenseTerm" name="LicenseTerm" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration"/>
<xsd:element id="inis_LongtermDebtMaturityAfterYearFour" name="LongtermDebtMaturityAfterYearFour" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
<xsd:element abstract="true" id="inis_MajorShareholdersMember" name="MajorShareholdersMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_NonqualifiedOptionsMember" name="NonqualifiedOptionsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_NoteToFinancialStatementDetailsTextual" name="NoteToFinancialStatementDetailsTextual" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_NotesPayableForPurchaseContractOneMember" name="NotesPayableForPurchaseContractOneMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_NotesPayableForPurchaseContractTwoMember" name="NotesPayableForPurchaseContractTwoMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_NotesToFinancialStatements" name="NotesToFinancialStatements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_NotesToFinancialStatementsAbstract" name="NotesToFinancialStatementsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_NrcLicenseForTheDeconversionFacilityMember" name="NrcLicenseForTheDeconversionFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_NuclearMedicineProductsMember" name="NuclearMedicineProductsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element id="inis_NumberOfEmployeesHired" name="NumberOfEmployeesHired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration"/>
<xsd:element id="inis_NumberOfMajorCustomers" name="NumberOfMajorCustomers" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_OneEmployeeMember" name="OneEmployeeMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element id="inis_OperatingLeaseRightofuseAssetPeriodicReductionIncrease" name="OperatingLeaseRightofuseAssetPeriodicReductionIncrease" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
<xsd:element id="inis_OtherCommitmentsAnnualFixedPriceEscalationPercent" name="OtherCommitmentsAnnualFixedPriceEscalationPercent" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="instant"/>
<xsd:element id="inis_PercentOfTotalRevenues" name="PercentOfTotalRevenues" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
<xsd:element id="inis_PreferredStockConvertibleStockPriceTrigger" name="PreferredStockConvertibleStockPriceTrigger" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType" xbrli:periodType="instant"/>
<xsd:element id="inis_PreferredStockConvertibleThresholdTradingDays" name="PreferredStockConvertibleThresholdTradingDays" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant"/>
<xsd:element abstract="true" id="inis_PrepaymentForDufPlantMember" name="PrepaymentForDufPlantMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_ProductionEquipmentMember" name="ProductionEquipmentMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_QualifiedOptionsMember" name="QualifiedOptionsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_RelatedPartyOneMember" name="RelatedPartyOneMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_RelatedPartyThreeMember" name="RelatedPartyThreeMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_RelatedPartyTwoMember" name="RelatedPartyTwoMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element id="inis_SharebasedCompensationArrangementBySharebasedPaymentAwardPercentOfGrossPay" name="SharebasedCompensationArrangementBySharebasedPaymentAwardPercentOfGrossPay" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="instant"/>
<xsd:element id="inis_StockIssuedDuringPeriodSharesWarrantExercises" name="StockIssuedDuringPeriodSharesWarrantExercises" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration"/>
<xsd:element id="inis_StockIssuedDuringPeriodValueWarrantExercises" name="StockIssuedDuringPeriodValueWarrantExercises" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_SubscriptionAgreementsWithCertainInvestorsMember" name="SubscriptionAgreementsWithCertainInvestorsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_The2006PlanMember" name="The2006PlanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_The2013PromissoryNoteMember" name="The2013PromissoryNoteMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_The2015IncentivePlanMember" name="The2015IncentivePlanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_The2018PromissoryNoteMember" name="The2018PromissoryNoteMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_The2019PromissoryNoteMember" name="The2019PromissoryNoteMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_The401kPlanMember" name="The401kPlanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_TheranosticsProductsMember" name="TheranosticsProductsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_ThreeCustomersMember" name="ThreeCustomersMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_TwoEmployeesMember" name="TwoEmployeesMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-1-description-of-business-and-significant-accounting-policies-schedule-of-common-stock-equivalents-outstanding-details" name="statement-statement-note-1-description-of-business-and-significant-accounting-policies-schedule-of-common-stock-equivalents-outstanding-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-1-description-of-business-and-significant-accounting-policies-schedule-of-weighted-average-number-of-shares-details" name="statement-statement-note-1-description-of-business-and-significant-accounting-policies-schedule-of-weighted-average-number-of-shares-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-1-description-of-business-and-significant-accounting-policies-tables" name="statement-statement-note-1-description-of-business-and-significant-accounting-policies-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-10-income-taxes-schedule-of-deferred-tax-assets-and-liabilities-details" name="statement-statement-note-10-income-taxes-schedule-of-deferred-tax-assets-and-liabilities-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-10-income-taxes-schedule-of-effective-income-tax-rate-reconciliation-details" name="statement-statement-note-10-income-taxes-schedule-of-effective-income-tax-rate-reconciliation-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-10-income-taxes-tables" name="statement-statement-note-10-income-taxes-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-12-asset-retirement-obligation-schedule-of-asset-retirement-obligation-activity-details" name="statement-statement-note-12-asset-retirement-obligation-schedule-of-asset-retirement-obligation-activity-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-12-asset-retirement-obligation-tables" name="statement-statement-note-12-asset-retirement-obligation-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-14-revenue-recognition-disaggregation-of-revenue-details" name="statement-statement-note-14-revenue-recognition-disaggregation-of-revenue-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-14-revenue-recognition-tables" name="statement-statement-note-14-revenue-recognition-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-15-segment-information-schedule-of-segment-information-by-segment-details" name="statement-statement-note-15-segment-information-schedule-of-segment-information-by-segment-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-15-segment-information-tables" name="statement-statement-note-15-segment-information-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-5-property-plant-and-equipment-schedule-of-property-plant-and-equipment-details" name="statement-statement-note-5-property-plant-and-equipment-schedule-of-property-plant-and-equipment-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-5-property-plant-and-equipment-tables" name="statement-statement-note-5-property-plant-and-equipment-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-6-patents-and-other-intangible-assets-schedule-of-future-amortization-expense-details" name="statement-statement-note-6-patents-and-other-intangible-assets-schedule-of-future-amortization-expense-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-6-patents-and-other-intangible-assets-schedule-of-intangible-assets-details" name="statement-statement-note-6-patents-and-other-intangible-assets-schedule-of-intangible-assets-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-6-patents-and-other-intangible-assets-tables" name="statement-statement-note-6-patents-and-other-intangible-assets-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-7-convertible-debentures-and-notes-payable-schedule-of-longterm-debt-instruments-details" name="statement-statement-note-7-convertible-debentures-and-notes-payable-schedule-of-longterm-debt-instruments-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-7-convertible-debentures-and-notes-payable-schedule-of-longterm-debt-instruments-details-parentheticals" name="statement-statement-note-7-convertible-debentures-and-notes-payable-schedule-of-longterm-debt-instruments-details-parentheticals" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-7-convertible-debentures-and-notes-payable-schedule-of-maturities-of-longterm-debt-details" name="statement-statement-note-7-convertible-debentures-and-notes-payable-schedule-of-maturities-of-longterm-debt-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-7-convertible-debentures-and-notes-payable-tables" name="statement-statement-note-7-convertible-debentures-and-notes-payable-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-8-lease-obligations-lease-cost-details" name="statement-statement-note-8-lease-obligations-lease-cost-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-8-lease-obligations-schedule-of-future-minimum-lease-payments-details" name="statement-statement-note-8-lease-obligations-schedule-of-future-minimum-lease-payments-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-8-lease-obligations-tables" name="statement-statement-note-8-lease-obligations-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-9-shareholders-equity-redeemable-convertible-preferred-stock-options-and-warrants-option-activity-details" name="statement-statement-note-9-shareholders-equity-redeemable-convertible-preferred-stock-options-and-warrants-option-activity-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-9-shareholders-equity-redeemable-convertible-preferred-stock-options-and-warrants-restricted-stock-units-activity-details" name="statement-statement-note-9-shareholders-equity-redeemable-convertible-preferred-stock-options-and-warrants-restricted-stock-units-activity-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-9-shareholders-equity-redeemable-convertible-preferred-stock-options-and-warrants-schedule-of-warrant-activity-details" name="statement-statement-note-9-shareholders-equity-redeemable-convertible-preferred-stock-options-and-warrants-schedule-of-warrant-activity-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-note-9-shareholders-equity-redeemable-convertible-preferred-stock-options-and-warrants-tables" name="statement-statement-note-9-shareholders-equity-redeemable-convertible-preferred-stock-options-and-warrants-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
<xsd:element abstract="true" id="inis_statement-statement-significant-accounting-policies-policies" name="statement-statement-significant-accounting-policies-policies" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
</xsd:schema>


16 Previous Filings that this Filing References

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 2/08/24  International Isotopes Inc.       8-K:1,7,9   2/08/24   13:347K                                   RDG Filings/FA
 5/10/23  International Isotopes Inc.       8-K:5,9     5/08/23   11:332K                                   EDGARSources LLC/FA
 4/06/23  International Isotopes Inc.       10-K       12/31/22   81:11M                                    EDGARSources LLC/FA
12/28/22  International Isotopes Inc.       8-K:3,5,9  12/28/22   11:189K                                   EDGARSources LLC/FA
 2/22/22  International Isotopes Inc.       8-K:2,3,5,9 2/16/22   11:191K                                   EDGARSources LLC/FA
 2/16/22  International Isotopes Inc.       8-K:1,9     2/10/22   11:364K                                   EDGARSources LLC/FA
 7/21/20  International Isotopes Inc.       8-K:5,9     7/14/20    2:80K                                    EDGARSources LLC/FA
 7/30/18  International Isotopes Inc.       8-K:5,9     7/24/18    2:118K                                   EDGARSources LLC/FA
 2/24/17  International Isotopes Inc.       8-K:1,3,5,9 2/17/17    4:218K                                   EDGARSources LLC/FA
 3/31/15  International Isotopes Inc.       10-K       12/31/14   82:9.2M                                   EDGARSources LLC/FA
 8/08/14  International Isotopes Inc.       10-Q        6/30/14   48:2.8M                                   EDGARSources LLC/FA
 3/28/14  International Isotopes Inc.       10-K       12/31/13   80:4.9M                                   EDGARSources LLC/FA
 8/16/10  International Isotopes Inc.       10-Q        6/30/10    7:83M                                    Barker Darrell/FA
10/27/09  International Isotopes Inc.       8-K:1,7,9  10/26/09    3:108K                                   Barker Darrell/FA
 9/17/08  International Isotopes Inc.       8-K:1,9     9/12/08    2:45K                                    Barker Darrell/FA
 5/01/97  International Isotopes Inc.       SB-2                  10:572K                                   CT EDGAR123/FA
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