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Laffittite

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About LaffittiteHide

00108500014946713895359.jpg
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.
As analogue of UM1993-09-S:AgHgSb.


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

Place of Conservation of Type Material:
07113600014947220867870.jpg
Darker red at the center of the picture is laffittite; red mineral around is routhierite; Collection : National School of Mines of Paris

Synonyms of LaffittiteHide

Other Language Names for LaffittiteHide

German:Laffittit
Spanish:Laffittita

Common AssociatesHide

Associated Minerals Based on Photo Data:
8 photos of Laffittite associated with OrpimentAs2S3
7 photos of Laffittite associated with RealgarAs4S4
4 photos of Laffittite associated with GetchelliteAsSbS3
3 photos of Laffittite associated with QuartzSiO2
2 photos of Laffittite associated with StibniteSb2S3
2 photos of Laffittite associated with RouthieriteTl(Cu,Ag)(Hg,Zn)2(As,Sb)2S6
2 photos of Laffittite associated with CalciteCaCO3
1 photo of Laffittite associated with CinnabarHgS
1 photo of Laffittite associated with PierrotiteTl2(Sb,As)10S16

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. 3 : P3
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)Cr1.5Sb0.5S4Iso. m3m (4/m 3 2/m)
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
5.4.9Hakite-(Hg)Cu6Cu4Hg2Sb4Se12SeIso. 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
      • 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 Region
[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 Mountains
        • Potosi Mining 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
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia
 
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