Designation:D934−13StandardPracticesforIdentificationofCrystallineCompoundsinWater-FormedDepositsByX-RayDiffraction1ThisstandardisissuedunderthefixeddesignationD934;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThesepracticesprovideforX-raydiffractionanalysisofpowderedcrystallinecompoundsinwater-formeddeposits.Twoaregivenasfollows:SectionsPracticeA—Camera12to21PracticeB—Diffractometer22to301.2Bothpracticesyieldqualitativeidentificationofcrystal-linecomponentsofwater-formeddepositsforwhichX-raydiffractiondataareavailableorcanbeobtained.Greaterdifficultyisencounteredinidentificationwhenthenumberofcrystallinecomponentsincreases.1.3Amorphousphasescannotbeidentifiedwithoutspecialtreatment.Oils,greases,andmostorganicdecompositionproductsarenotidentifiable.1.4Thesensitivityforagivencomponentvarieswithacombinationofsuchfactorsasdensity,degreeofcrystallization,particlesize,coincidenceofstronglinesofcomponentsandthekindandarrangementoftheatomsofthecomponents.Minimumpercentagesforidentificationmaythereforerangefrom1to40%.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevalueslistedinparenthesisareforinformationonly.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoconsultandestablishappropriatesafetyandhealthpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.SpecificprecautionarystatementsaregiveninSection8andNote20.2.ReferencedDocuments2.1ASTMStandards:2D887PracticesforSamplingWater-FormedDepositsD933PracticeforReportingResultsofExaminationandAnalysisofWater-FormedDepositsD1129TerminologyRelatingtoWaterD1193SpecificationforReagentWaterD2331PracticesforPreparationandPreliminaryTestingofWater-FormedDepositsE11SpecificationforWovenWireTestSieveCl...
