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Laffittite

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About LaffittiteHide

Pierre Laffitte (1925 - )
Formula:
AgHgAsS3
Hardness:
Crystal System:
Monoclinic
Name:
Named in 1974 by Zdeněk Johan,Joseph Mantienne, and R. Picot in honor of Pierre Paul Laffitte (January 1, 1925 Saint-Paul-de-Vence, Alpes-Maritimes, France - ], director of BRGM (French Geological Survey), then director and president of Ecole Nationale Supérieure des Mines de Paris.
This page provides mineralogical data about Laffittite.


Classification of LaffittiteHide

Approved
2.GA.35

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
A : Neso-sulfarsenites, etc. without additional S
3.4.10.2

3 : SULFOSALTS
4 : ø = 3
5.4.4

5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
4 : Sulpharsenites etc. of Zn and Hg

Physical Properties of LaffittiteHide

Hardness:
3½ on Mohs scale

Chemical Properties of LaffittiteHide

Formula:
AgHgAsS3

Crystallography of LaffittiteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 7.73 Å, b = 11.28 Å, c = 6.64 Å
β = 115.16°
Ratio:
a:b:c = 0.685 : 1 : 0.589
Unit Cell V:
524.04 ų (Calculated from Unit Cell)

Type Occurrence of LaffittiteHide

Synonyms of LaffittiteHide

Other Language Names for LaffittiteHide

German:Laffittit
Spanish:Laffittita

Common AssociatesHide

Associated Minerals Based on Photo Data:
Orpiment8 photos of Laffittite associated with Orpiment on mindat.org.
Realgar7 photos of Laffittite associated with Realgar on mindat.org.
Getchellite4 photos of Laffittite associated with Getchellite on mindat.org.
Quartz3 photos of Laffittite associated with Quartz on mindat.org.
Stibnite2 photos of Laffittite associated with Stibnite on mindat.org.
Routhierite2 photos of Laffittite associated with Routhierite on mindat.org.
Calcite2 photos of Laffittite associated with Calcite on mindat.org.
Cinnabar1 photo of Laffittite associated with Cinnabar on mindat.org.
Pierrotite1 photo of Laffittite associated with Pierrotite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

2.GA.05ProustiteAg3AsS3Trig. 3m (3 2/m) : R3c
2.GA.05PyrargyriteAg3SbS3Trig. 3m : R3c
2.GA.10PyrostilpniteAg3SbS3Mon. 2/m : P21/b
2.GA.10XanthoconiteAg3AsS3Mon. 2/m : B2/b
2.GA.15SamsoniteAg4MnSb2S6Mon. 2/m : P21/m
2.GA.20SkinneriteCu3SbS3Mon. 2/m : P21/b
2.GA.20WitticheniteCu3BiS3Orth. 2 2 2 : P21 21 21
2.GA.25LapieiteNiCuSbS3Orth.
2.GA.25MückeiteNiCu(Bi,Sb)S3Orth. 2 2 2 : P21 21 21
2.GA.25MalyshevitePdCuBiS3Orth. mmm (2/m 2/m 2/m) : Pmmm
2.GA.25LisiguangitePtCuBiS3Orth. 2 2 2 : P21 21 21
2.GA.30AktashiteCu6Hg3As4S12Trig. 3 : R3
2.GA.30GruzdeviteCu6Hg3Sb4S12Trig.
2.GA.30NowackiiteCu6Zn3As4S12Trig. 3 : R3
2.GA.40RouthieriteTl(Cu,Ag)(Hg,Zn)2(As,Sb)2S6Tet. 4 2m : I4 2m
2.GA.40StalderiteTl(Cu,Ag)(Zn,Fe,Hg)2(As,Sb)2S6Tet.
2.GA.45ErniggliiteTl2SnAs2S6Trig.
2.GA.50BournonitePbCuSbS3Orth. mm2 : Pmn21
2.GA.50SeligmannitePbCuAsS3Orth. mmm (2/m 2/m 2/m) : Pmmn
2.GA.50SoučekitePbCuBi(S,Se)3Orth.

Related Minerals - Dana Grouping (8th Ed.)Hide

3.4.10.1ChristiteTlHgAsS3Mon. 2/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

5.4.1NowackiiteCu6Zn3As4S12Trig. 3 : R3
5.4.2Florensovite(Cu,Zn)Cr1.5Sb0.5S4
5.4.3AktashiteCu6Hg3As4S12Trig. 3 : R3
5.4.5Galkhaite(Cs,Tl)(Hg,Cu,Zn)6(As,Sb)4S12Iso. 4 3m : I4 3m
5.4.6LivingstoniteHgSb4S6(S2)Mon. 2/m : B2/b
5.4.7GruzdeviteCu6Hg3Sb4S12Trig.
5.4.8TvalchrelidzeiteHg3SbAsS3Mon. 2/m
5.4.9HakiteCu6[Cu4Hg2]Sb4Se13Iso. 4 3m : I4 3m

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for LaffittiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
- JOHAN, Z., MANTIENNE, J. & PICOT, R. (1974) : La routhiérite, TlHgAsS3, et la laffittite, AgHgAsS3, deux nouvelles espèces minérales, Bull. Soc. fr. Minéral., 97, 48-53.
- American Mineralogist (1975): 60: 945-946.
- Nakai,I. & Appleman, D.E. (1983): Laffitite, AgHgAsS3, crystal structure & second occurrence from the Getchell Mine, Nevada. American Mineralogist, 68: 235-244

Internet Links for LaffittiteHide

Localities for LaffittiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
France (TL)
 
  • Provence-Alpes-Côte d'Azur
    • Hautes-Alpes
      • La Chapelle-en-Valgaudemar (La Chapelle-en-Valgaudémar)
Bull.Soc.fr.Min.Crist.(1974) 97, 48-53; Johan, Z. & Mantienne, J. (2000): Thallium-rich mineralization at Jas Roux, Hautes-Alpes, France: a complex epithermal, sediment-hosted, ore-forming system. J. Czech Geol. Soc. 45, 63-77.
Italy
 
  • Tuscany
    • Lucca Province
      • Apuan Alps
        • Stazzema
          • Sant'Anna di Stazzema
Biagioni, C., Bonaccorsi, E., Moëlo, Y., Orlandi, P. (2014): Mercury-arsenic sulfosalts from Apuan Alps (Tuscany, Italy). II. Aktashite, Cu6Hg3As4S12, and laffittite, AgHgAsS3, from the Monte Arsiccio mine: occurrence and crystal structure. Periodico di Mineralogia, 83, 1-18.
Kyrgyzstan
 
  • Osh Oblast
    • Alai Range (Alay Range)
[Lapis 1993:11 p11-24]; Evseev, A. A. (1995) Kazaknstan and Middle Asia. A brief Mineralogical Guide. World of Stone 8:24-30; Pervukhina, N. V., Borisov, S. V., Magarill, S. A., Vasil’ev, V. I., & Kuratieva, N. V. (2010). Redetermination and Crystallographic Analysis of the Structure of Sb-Containing Laffittite AgHg (As, Sb) S 3 From Chauvai (Kyrgyzstan). Journal of Structural Chemistry, 51(4), 683-688.
USA
 
  • Nevada
    • Humboldt Co.
      • Osgood Mts
        • Potosi District
          • Adam Peak
NBMG Spec. Pub. 31 Minerals of Nevada; Nakai,I. & Appleman, D.E. (1983): Laffitite, AgHgAsS3, crystal structure & second occurrence from the Getchell Mine, Nevada, American Mineralogist, 68: 235-244
      • Potosi District
        • Adam Peak
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia
Mineral and/or Locality  
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