Designation:D5357−03(Reapproved2013)StandardTestMethodforDeterminationofRelativeCrystallinityofZeoliteSodiumAbyX-rayDiffraction1ThisstandardisissuedunderthefixeddesignationD5357;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThistestmethodcoversaprocedurefordeterminingtherelativecrystallinityofzeolitesodiumA(zeoliteNaA)usingselectedpeaksfromtheX-raydiffractionpatternofthezeolite.1.2Theterm“intensityofanX-raypowderdiffraction(XRD)peak”referstothe“integralintensity,”eithertheareaorcountsunderthepeakortheproductofthepeakheightandthepeakwidthathalfheight.1.3ThistestmethodprovidesanumberthatistheratioofintensityofportionsoftheXRDpatternofthesampletointensityofthecorrespondingportionofthepatternofareferencezeoliteNaA.Theintensityratio,expressedasapercentage,isthenlabeledrelativecrystallinityofNaA.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D3906TestMethodforDeterminationofRelativeX-rayDiffractionIntensitiesofFaujasite-TypeZeolite-ContainingMaterialsE177PracticeforUseoftheTermsPrecisionandBiasinASTMTestMethodsE456TerminologyRelatingtoQualityandStatisticsE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethod3.SummaryofTestMethod3.1TheXRDpatternsofthezeoliteNaAorzeoliteNaA-containingsampleandthereferencesample(NaA)areob-tainedunderthesameconditions.Acomparisonofthesumsofintensitiesofsixstrongpeaksinthe11–32°2θrangeismade,givingrelativecrystallinityofNaA.Thistypeofcomparisoniscommonlyus...
