[Content and History] [Recent Issues] [Back Issues] [Subscriptions] [Contacts] See Also: [Diamond Crystals] [Excalibur Minerals] [Hudson Institute] [Minerals on CDROM] Mineral News was founded some twenty years ago and has developed a following of avid mineral collectors seeking timely information about new finds and other items of interest to the collector community. Articles are solicited from collector and scientific authors. General Laffittite InformationAgHgAsS3 |
Molecular Weight = 479.58 gm |
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Silver 22.49 % Ag |
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Mercury 41.83 % Hg |
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Arsenic 15.62 % As |
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Sulfur 20.06 % S |
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______ |
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100.00 % |
AgHgAsS3 |
In a hydrothermal deposit with other arsenic sulfides. |
Approved IMA 1974 |
Jas Roux, Valgaudemar, Hautes-Alpes, Provence-Alpes-Côte d'Azur, France. Link to MinDat.org Location Data. |
Named for Pierre Laffitte, Director, National School of Mines, Paris, France. |
Laffittite + Pronunciation |
ICSD 31194 |
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PDF 35-436 |
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Laffittite Crystallographya:b:c =0.6851:1:0.5886 |
a = 7.732, b = 11.285, c = 6.643, Z = 4; beta = 115.16° V = 524.65 Den(Calc)= 6.07 |
Monoclinic - DomaticH-M Symbol (m) Space Group: Aa |
By Intensity(I/Io): 3.512(1), 3.202(0.78), 3.015(0.69), |
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Mouse
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| Physical Properties of Laffittite{???} Indistinct |
Dark red. |
6.07 |
Translucent to Opaque |
3.5 - Copper Penny |
Metallic |
brownish red |
| Optical Properties of LaffittiteStrong, from light gray-blue to dark gray. |
Bluish white with numerous purple-red internal reflections. |
Strong. |
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| Calculated Properties of LaffittiteBulk Density (Electron Density)=5.27 gm/cc |
note: Specific Gravity of Laffittite =6.07 gm/cc. Fermion Index = 0.12 |
Boson Index = 0.88 PELaffittite = 754.44 barns/electron |
U=PELaffittite x rElectron Density=3,972.33 barns/cc. GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Laffittite is Not Radioactive | Laffittite Classification03.04.10.02 (03)Sulfides - Sulfosalts |
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(03.04)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.04.10)Dana Group |
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02.GA.35 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.G - Sulfarsenites, sulfantimonites, sulfbismuthites |
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02.GA -Neso-sulfarsenites, etc., without additional S |
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| Other Laffittite InformationNAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
Links to other databases for Laffittite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - Google Images 6 - Google Scholar 7 - Handbook of Mineralogy (MinSocAm) 8 - Handbook of Mineralogy (UofA) 9 - MinDAT 10 - MinMax(Deutsch) 11 - MinMax(English) 12 - Mineralienatlas (Deutsch) 13 - QUT Mineral Atlas 14 - Ruff.Info 15 - WWW-MINCRYST Search for Laffittite using: Visit our Advertisers for Laffittite : 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 Laffittite Mineral Data : Ask about Laffittite here : Print or Cut-and-Paste your Laffittite Specimen Label here :
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