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Hemihedrite Mineral Data |
General Hemihedrite Information |
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Pb10Zn(CrO4)6(SiO4)2F2 | ||
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Molecular Weight = 3,055.52 gm | ||
Zinc 2.14 % Zn 2.66 % ZnO | |||
Chromium 10.21 % Cr 19.64 % CrO3 | |||
Silicon 1.84 % Si 3.93 % SiO2 | |||
Lead 67.81 % Pb 73.05 % PbO | |||
Oxygen 16.76 % O | |||
Fluorine 1.24 % F 1.24 % F | |||
- % F -0.52 % -O=F2 | |||
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100.00 % 100.00 % = TOTAL OXIDE | |||
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Pb10Zn(CrO4)6(SiO4)2F2 | ||
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Secondary lead mineral from oxidized primary minerals. | ||
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Approved IMA 1967 | ||
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Florence mine, Pinal County and Pack Rat claim, Whickenburg, Maricopa County, Arizona, USA. Link to MinDat.org Location Data. | ||
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Named for its hemihedral crystal morphology. | ||
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Hemihedrite + Pronunciation ![]() |
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ICSD 15175 | ||
PDF 24-1457 | |||
Hemihedrite Image | |||
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Hemihedrite Crystallography |
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a:b:c =0.8299:1:0.9473 | ||
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a = 9.497, b = 11.443, c = 10.841, Z = 1; alpha = 120.5°, beta = 92.1°, gamma = 55.84° V = 839.42 Den(Calc)= 6.04 | ||
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Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1 | ||
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By Intensity(I/Io): 3.302(1), 3.11(0.69), 3.163(0.69), | ||
Physical Properties of Hemihedrite |
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Orange, Brown, Black. | ||
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6.42 | ||
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3 - Calcite | ||
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Vitreous (Glassy) | ||
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saffron | ||
Optical Properties of Hemihedrite |
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CI meas= -0.203 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -0.199 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2109,KPDmeas= 0.2116,KC= 0.1759 Ncalc = 2.13 |
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Biaxial (+), a=2.105, b=2.32, g=2.65, bire=0.5450, 2V(Calc)=88, 2V(Meas)=88. Dispersion strong. | ||
Calculated Properties of Hemihedrite |
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Bulk Density (Electron Density)=5.46 gm/cc note: Specific Gravity of Hemihedrite =6.44 gm/cc. |
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Fermion Index = 0.16 Boson Index = 0.84 |
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PEHemihedrite =1,231.05 barns/electron U=PEHemihedrite x rElectron Density=6,725.33 barns/cc. |
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GRapi = 0 (Gamma Ray American Petroleum Institute Units) Hemihedrite is Not Radioactive |
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Hemihedrite Classification |
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36.01.01.02 (36)Compound Chromates | ||
(36.01)with miscellaneous formulae | |||
(36.01.01)Dana Group | |||
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07.FC.15 07 - SULFATES (SELENATES, TELLURATES) | ||
07.F - Chromates | |||
07.FC -With PO4, AsO4, SiO4 | |||
Other Hemihedrite Information |
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PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
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Links to other databases for Hemihedrite : 1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - GeoScienceWorld 6 - Google Images 7 - Google Scholar 8 - Handbook of Mineralogy (MinSocAm) 9 - Handbook of Mineralogy (UofA) 10 - MinDAT 11 - Mineralienatlas (Deutsch) 12 - Online Mineral Museum 13 - QUT Mineral Atlas 14 - Ruff.Info 15 - WWW-MINCRYST Search for Hemihedrite using: Visit our Advertisers for Hemihedrite : Ask about Hemihedrite here : Print or Cut-and-Paste your Hemihedrite Specimen Label here :
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