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Launayite

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Louis de Launay
Formula:
CuPb10(Sb,As)12S20
Colour:
Lead-gray
Lustre:
Metallic
Hardness:
3½ - 4
Specific Gravity:
5.83 (Calculated)
Crystal System:
Monoclinic
Name:
Named by John L. Jambor in 1967 in honor of Louis Auguste Alphonse de Launay (19 July 1860, Paris, France - 30 June 1938, Paris, France) for his contributions to the origins of mineral depsots. De Launay was a professor at the School of Mines in Paris, a geologist, speleologist, writer, biographer, and poet.
This page provides mineralogical data about Launayite.


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Classification of LaunayiteHide

Approved
Approval Year:
1966
First Published:
1967
2.LB.30

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
L : Unclassified Sulfosalts
B : With essential Pb
3.6.6.1

3 : SULFOSALTS
6 : 2 < ø < 2.49
5.6.11

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

Physical Properties of LaunayiteHide

Metallic
Transparency:
Opaque
Colour:
Lead-gray
Streak:
Black
Hardness:
3½ - 4 on Mohs scale
Hardness:
VHN50=171 - 197 kg/mm2 - Vickers
Cleavage:
Perfect
{100} and {001}
Fracture:
Fibrous
Density:
5.83 g/cm3 (Calculated)

Chemical Properties of LaunayiteHide

Formula:
CuPb10(Sb,As)12S20
IMA Formula:
CuPb10(Sb,As)13S20
Idealised Formula:
Pb22Sb26S61
Common Impurities:
As

Crystallography of LaunayiteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 42.58 Å, b = 4.01 Å, c = 32.16 Å
β = 102.02°
Ratio:
a:b:c = 10.618 : 1 : 8.02
Unit Cell V:
5,370.79 ų (Calculated from Unit Cell)
Z:
2
Comment:
Space groups C2, Cm or C2/m (pseudocell).

Type Occurrence of LaunayiteHide

General Appearance of Type Material:
Observed only in polsihed sections.
Place of Conservation of Type Material:
Canadian Geological Survey, Ottawa, 12176.
Canadian Museum of Nature, Ottawa, Canada.
Associated Minerals at Type Locality:

Synonyms of LaunayiteHide

Other Language Names for LaunayiteHide

German:Launayit
Spanish:Launayita

Related Minerals - Nickel-Strunz GroupingHide

2.LB.05MiharaiteCu4FePbBiS6Orth.
2.LB.30ArdaitePb19Sb13S35Cl7Mon.
2.LB.30MadocitePb19(Sb,As)16S43Orth.
2.LB.30PlayfairitePb16(Sb,As)19S44ClMon.
2.LB.30SorbyiteCuPb9(Sb,As)11S26Mon. 2/m : B2/m
2.LB.30SterryiteCu(Ag,Cu)3Pb19(Sb,As)22(As-As)S56Mon. 2/m
2.LB.35Larosite(Cu,Ag)21PbBiS13Orth.
2.LB.40PetroviciteCu3HgPbBiSe5Orth.
2.LB.40MazzettiiteAg3HgPbSbTe5Orth.
2.LB.45CreraritePt2-x(Bi,Pb)11(S,Se)11Tric. 1 : P1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

5.6.1SartoritePbAs2S4Mon. 2/m : P21/m
5.6.2DufrénoysitePb2As2S5Mon. 2 : P21
5.6.3LiveingitePb9As13S28Mon.
5.6.4BaumhaueritePb12As16S36Tric. 1 : P1
5.6.5GratonitePb9As4S15Trig. 3m : R3m
5.6.6JordanitePb14(As,Sb)6S23Mon. 2/m : P21/m
5.6.7FülöppitePb3Sb8S15Mon. 2/m : B2/b
5.6.8ZinkenitePb9Sb22S42Hex. 6 : P63
5.6.9PlagionitePb5Sb8S17Mon. 2/m
5.6.10HeteromorphitePb7Sb8S19Mon. 2/m : B2/b
5.6.12PlayfairitePb16(Sb,As)19S44ClMon.
5.6.13SemseyitePb9Sb8S21Mon. 2/m : B2/b
5.6.14MadocitePb19(Sb,As)16S43Orth.
5.6.15BoulangeritePb5Sb4S11Mon. 2/m : P21/b
5.6.17RobinsonitePb4Sb6S13Mon. 2/m : P21/m
5.6.18GuettarditePbAsSbS4Mon. 2/m : P21/b
5.6.19Twinnite Pb0.8Tl0.1Sb1.3As0.8S4Mon. 2/m
5.6.20VeenitePb2(Sb,As)2S5Mon. 2 : P21
5.6.21SorbyiteCuPb9(Sb,As)11S26Mon. 2/m : B2/m
5.6.22GeocronitePb14(Sb,As)6S23Mon. 2/m : P21/m
5.6.23GalenobismutitePbBi2S4Orth. mmm (2/m 2/m 2/m)
5.6.24CosalitePb2Bi2S5Orth. mmm (2/m 2/m 2/m)
5.6.25CannizzaritePb48Bi56S132Mon. 2/m : P21/m
5.6.26LillianitePb3-2xAgxBi2+xS6Orth. mmm (2/m 2/m 2/m)
5.6.27GiessenitePb27Cu2(Bi,Sb)19S57Mon. 2/m
5.6.28Platynite
5.6.29XilingolitePb3Bi2S6Mon.
5.6.30WeibullitePb5Bi8Se7S11Orth.
5.6.31WittitePb9Bi12(S,Se)27Mon.
5.6.32KirkiitePb10Bi3As3S19Mon. 2/m : P21/m
5.6.33UstarasitePb(Bi,Sb)6S10 (?)

Other InformationHide

Notes:
1:1 HNO3 rapidly tarnishes launayite iridescent, then black.
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 LaunayiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Jambor, J.L. (1967) New lead sulfantimonides from Madoc, Ontario. Part 2 - mineral descriptions. The Canadian Mineralogist: 9: 191-213.
Mandarino, J.A., Kato, A. (1968) New mineral names. American Mineralogist: 53: 1421-1427.
Bulletin de la Société française de Minéralogie et de Cristallographie (1981): 104: 757-762.
Moëlo, Y., Makovicky, E., Mozgova, N.N., Jambor, J.L., Cook, N., Pring, A., Paar, W., Nickel, E.H., Graeser, S., Karup-Møller, S., Balic-Zunic, T., Mumme, W.G., Vurro, F., Topa, D., Bindi, L., Bente, K., Shimizu, M. (2008) Sulfosalt systematics: a review. Report of the sulfosalt sub-committee of the IMA Commission on Ore Mineralogy. European Journal of Mineralogy: 20: 7-46.

Internet Links for LaunayiteHide

Localities for LaunayiteHide

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.
Canada (TL)
 
  • Ontario
    • Hastings Co.
      • Madoc area
        • Huntingdon Township
JAMBOR, J.L. (1967): New lead sulfantimonides from Madoc, Ontario. 1. Mineral descriptions. Canadian Mineralogist 9, 7-24. JAMBOR, J.L. (1967): New lead sulfantimonides from Madoc, Ontario. 2. Mineral descriptions. Canadian Mineralogist 9, 191-213. JAMBOR, J.L. (1968): New lead sulfantimonides from Madoc, Ontario. 3. Syntheses, paragenesis, origin. Canadian Mineralogist 10, 507-521. JAMBOR, J.L., LAFLAMME, J.H.G. & WALKER, D.A. (1982): A re-examination of the Madoc sulfosalts. Mineralogical Record 13, 93-100.
Indonesia
 
  • Sulawesi (Celebes)
    • Sulawesi Selatan Province (South Sulawesi Province)
      • Gowa
Nur, I., Idrus, A., Pramumijoyo, S., Harijoko, A., Watanabe, K., Imai, A., ... & Irfan, U. R. (2012). Elemental Mass Balance of the Hydrothermal Alteration Associated with the Baturappe Epithermal Silver-Base Metal Prospect, South Sulawesi, Indonesia.
Slovakia
 
  • Žilina Region
    • Liptovský Mikuláš Co.
Adamus B. et all.,1993: Launayit, nový minerál na ložisku Sb rúd Dúbrava v Nízkych Tatrách. Min.Slovaca,Bratislava, 25, 1, 73-74
Mineral and/or Locality  
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