Designation:D5758−01(Reapproved2021)StandardTestMethodforDeterminationofRelativeCrystallinityofZeoliteZSM-5byX-RayDiffraction1ThisstandardisissuedunderthefixeddesignationD5758;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThistestmethodcoversaprocedurefordeterminationoftherelativecrystallinityofzeoliteZSM-5usingselectedpeaksfromtheX-raydiffractionpatternofthezeolite.1.2ThetestmethodprovidesanumberthatistheratioofintensityofaportionoftheXRDpatternofthesampleZSM-5tointensityofthecorrespondingportionofthepatternofareferenceZSM-5.Theintensityratio,expressedasapercentage,isthenlabeledpercentXRDrelativecrystallinity/ZSM-5.Thistypeofcomparisoniscommonlyusedinzeolitetechnologyandisoftenreferredtoaspercentcrystallinity.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D3906TestMethodforDeterminationofRelativeX-rayDiffractionIntensitiesofFaujasite-TypeZeolite-ContainingMaterialsD5357TestMethodforDeterminationofRelativeCrystal-linityofZeoliteSodiumAbyX-rayDiffractionE177PracticeforUseoftheTermsPrecisionandBiasinASTMTestMethodsE456TerminologyRelatingtoQualityandStatisticsE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethod3.SummaryofTestMethod3.1XRDpatternsofthesampleZSM-5andthereferenceZSM-5areobtainedund...
