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Joesmithite Mineral Data |
General Joesmithite Information |
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PbCa2(Mg,Fe++,Fe+++)5Si6Be2O22(OH)2 | |
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Molecular Weight = 1,043.42 gm | |
Calcium 7.30 % Ca 10.21 % CaO | ||
Magnesium 5.82 % Mg 9.66 % MgO | ||
Manganese 1.58 % Mn 2.04 % MnO | ||
Beryllium 1.55 % Be 4.31 % BeO | ||
Iron 10.70 % Fe 2.75 % FeO / 12.24 % Fe2O3 | ||
Silicon 16.15 % Si 34.55 % SiO2 | ||
Hydrogen 0.17 % H 1.55 % H2O | ||
Lead 19.86 % Pb 20.62 % Pb2O | ||
Oxygen 36.49 % O | ||
Fluorine 0.36 % F 0.36 % F | ||
- % F -0.15 % -O=F2 | ||
______ ______ | ||
100.00 % 98.16 % = TOTAL OXIDE | ||
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PbCa1.9Mg2.5Fe3+1.6Fe2+0.4Mn2+0.3Si6Be1.8O22(OH)1.8F0.2 | |
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Metamorphosed manganese ores. | |
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Approved IMA 1968 | |
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At Lanban, Varmalnd, Sweden. Link to MinDat.org Location Data. | |
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Named for Prof. Joseph Victor Smith (1928-), English-American mineralogist and petrologist of the University of Chicago, Chicago, Illinois, USA. | |
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Joesmithite + Pronunciation ![]() |
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ICSD 74285 | |
PDF 22-531 | ||
Joesmithite Crystallography |
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a:b:c =0.5528:1:0.2925 | |
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a = 9.88, b = 17.87, c = 5.227, Z = 2; beta = 105.67° V = 888.56 Den(Calc)= 3.90 | |
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Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2/a | |
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By Intensity(I/Io): 3.33(1), 2.53(0.6), 2.564(0.6), | |
Physical Properties of Joesmithite |
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{110} Perfect | |
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Black. | |
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3.83 | |
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Transparent to Translucent | |
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Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). | |
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5.5 - Knife Blade | |
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Subadamantine | |
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light brown | |
Optical Properties of Joesmithite |
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CI meas= -0.132 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -0.112 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1959,KPDmeas= 0.1995,KC= 0.1762 Ncalc = 1.67 - 1.69 |
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Biaxial (+), a=1.747, b=1.765, g=1.78, bire=0.0330, 2V(Calc)=84, 2V(Meas)=60-70. | |
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Olive. | |
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olive brown. | |
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Olive. | |
Calculated Properties of Joesmithite |
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Bulk Density (Electron Density)=3.70 gm/cc note: Specific Gravity of Joesmithite =3.90 gm/cc. |
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Fermion Index = 0.07 Boson Index = 0.93 |
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PEJoesmithite = 326.93 barns/electron U=PEJoesmithite x rElectron Density=1,209.00 barns/cc. |
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GRapi = 0 (Gamma Ray American Petroleum Institute Units) Joesmithite is Not Radioactive |
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Joesmithite Classification |
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66.01.04.01 (66)Inosilicate Double-Width Unbranched Chains, W=2 | |
(66.01)with P=2 amphibole configuration | ||
(66.01.04)Dana Group | ||
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09.DE.10 09 - SILICATES (Germanates) | |
09.D - Inosilicates* Structural terminology according to Liebau (1985) | ||
09.DE -Inosilicates with 2-periodic double chains, Si4O11; amphibole family | ||
Other Joesmithite Information |
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NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(AntBidBlaNic2) | |
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Links to other databases for Joesmithite : 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 Joesmithite using: Visit our Advertisers for Joesmithite : Ask about Joesmithite here : Print or Cut-and-Paste your Joesmithite Specimen Label here :
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