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1、GeneralGreenaliteInformationChemicalFormula:(Fe++,Fe+++)2-3Si2O5(OH)4Composition:MolecularWeight=354.28gm Iron 44.14 % Fe 46.64 % FeO / 11.27 % Fe2O3 Silicon 17.44 % Si 37.31 % SiO2 Hydrogen 0.94 % H 8.39 % H2O Oxygen 37.48 % O ______ ______
2、 100.00 % 103.61 % = TOTAL OXIDEEmpiricalFormula:Fe2+2.3Fe3+0.5Si2.2O5(OH)3.3Environment:Aprimaryphaseinsomebandedironformations.IMAStatus:ValidSpecies(Pre-IMA)1903Locality:BiwabikIronFormation,MesabiRange,Minnesota,USA.Linkto MinDat.orgLocationData.NameOrigin:Inallusiontoi
3、tsgreencolor. GreenaliteImageImages:GreenaliteComments:Darkolive-greenmassivegreenalitewithmetallicgalena.Location:LaUnionMine,Murcia,Spain.Scale:SeePhoto.©JeffWeissman/PhotographicGuidetoMineralSpeciesGreenaliteCrystallographyAxialRatios:a:b:c=0.5801:1:0.779CellDimensions:a=5.54,b=9.55,
4、c=7.44,Z=2;beta=104.2°V=381.60Den(Calc)=3.08CrystalSystem:MonoclinicSpaceGroup:UnkXRayDiffraction:ByIntensity(I/Io):2.571(1),7.12(0.8),3.559(0.8),1.593(0.6),1.553(0.4),2.184(0.4),2.849(0.2), PhysicalPropertiesofGreenaliteCleavage:NoneColor:Bluegreen,Lightyellowgreen,Darkgreen,Black.Densi
5、ty:2.85-3.15,Average=3Diaphaniety:TranslucenttoSubopaqueHabit:MicroscopicCrystals-Crystalsvisibleonlywithmicroscopes.Habit:Oolitic-<3mmroundedsphericalgrains.Hardness:2.5-FingerNailLuster:Earthy(Dull)Magnetism:ModeratelyMagneticStreak:greenishgray OpticalPropertiesofGreenaliteOpticalData
6、:Biaxial(+),a=1.65-1.675,b=1.674,g=1.674,bire=0.0010-0.0240,2V(Meas)=0.Pleochroism(x):paleyellow.Pleochroism(y):green.Pleochroism(z):green. CalculatedPropertiesofGreenaliteElectronDensity:relectron=3.01gm/ccnote:rGreenalite=3.08gm/cc.FermionIndexFermionIndex=0.01768BosonIndex=0.98232Phot
7、oelectric:PEGreenalite=13.80barns/electronU=PEGreenalitexrelectron=41.59barns/cc.Radioactivity:GRapi=0(GammaRayAmericanPetroleumInstituteUnits)GreenaliteisNotRadioactive GreenaliteClassificationDanaClass:71.1.2b.4(71)PhyllosilicateSheetsofSix-MemberedRings (71.1)with1:1la
