[Newest Minerals] [Minerals for Sale] [Educational Articles] [About Us] [Image Gallery] John Betts - Fine Minerals Classic minerals, out-of-print books & magazines, plus informative articles for collectors General Falkmanite InformationPb5Sb4S11 |
Molecular Weight = 1,842.83 gm |
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Antimony 25.77 % Sb |
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Lead 55.09 % Pb |
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Sulfur 19.14 % S |
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100.00 % |
Pb4.9Sb3.9S11 |
Similar to boulangerite. New data from synthetic material suggests meneghinite is closer in structure. |
Valid Species (Pre-IMA) |
Bayerland mine, Pfaffenreuth, Bayern (Bavaria), Germany. Link to MinDat.org Location Data. |
Named for O.C.A. Falkman. |
Falkmanite + Pronunciation |
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Falkmanite Crystallographya:b:c =2.7458:1:1.4485 |
a = 21.626, b = 7.876, c = 11.409, Z = 4; beta = 96.12° V = 1,932.18 Den(Calc)= 6.33 |
Monoclinic |
By Intensity(I/Io): 3.734(1)(312), 2.75(0.6)(603), 1.9(0.53)(340),
1.895(0.51)(334), 3.171(0.49)(122), 3.284(0.48)(512), 3.147(0.43)(222), 3.25( |
| Physical Properties of Falkmanite{???} Good |
Lead gray, Pink brown. |
6.31 |
Opaque |
2-3 - Gypsum-Calcite |
Metallic |
brownish gray |
| Optical Properties of Falkmanite |
| Calculated Properties of FalkmaniteBulk Density (Electron Density)=5.34 gm/cc |
note: Specific Gravity of Falkmanite =6.33 gm/cc. Fermion Index = 0.12 |
Boson Index = 0.88 PEFalkmanite =1,094.38 barns/electron |
U=PEFalkmanite x rElectron Density=5,839.40 barns/cc. GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Falkmanite is Not Radioactive | Falkmanite Classification03.05.02.02 (03)Sulfides - Sulfosalts |
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(03.05)where 2.5 < z/y < 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.05.02)Dana Group |
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02.HC.15 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.H - Sulfosalts of SnS Archetype |
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02.HC -With only Pb |
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| Other Falkmanite InformationNAME( Dana8) PHYS. PROP.(EurJMin, v 13, p 411) |
Links to other databases for Falkmanite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - Ecole des Mines de Paris 4 - Google Images 5 - Google Scholar 6 - MinDAT 7 - MinMax(Deutsch) 8 - MinMax(English) 9 - Mineralienatlas (Deutsch) 10 - QUT Mineral Atlas 11 - Ruff.Info Search for Falkmanite using: Visit our Advertisers for Falkmanite : AA Mineral SpecimensB & L Fine Minerals Crystalarium.com Dan Weinrich Fine Minerals Dan Weinrich Auctions Dakota Matrix Desert Winds Gems and Minerals Excalibur Minerals Exceptional Minerals Fabre Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club Wrights Rock Shop Translate Falkmanite Mineral Data : Ask about Falkmanite here : Print or Cut-and-Paste your Falkmanite Specimen Label here :
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