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Playfairite

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John Playfair
Formula:
Pb16(Sb,As)19S44Cl
Originally assumed to be Pb16Sb18S43.
Colour:
Lead gray to black
Lustre:
Metallic
Hardness:
3½ - 4
Specific Gravity:
5.72 (Calculated)
Crystal System:
Monoclinic
Name:
Named in 1967 by John Leslie Jambor in honor of John Playfair [March 10, 1748 Angus, Scotland, United Kingdom - July 20, 1819 Burntisland, Fife, Scotland, United Kingdom] mathematician, physicist, and geologist, Professor of Mathematics and Natural History (1785-1819), University of Edinburgh, Scotland. He is known for his pioneering work on geomorphology, but is best known for his explanation of James Hutton's Theory of the Earth.
This page provides mineralogical data about Playfairite.


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Classification of PlayfairiteHide

Approved
Approval Year:
1966
2.LB.30

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
L : Unclassified Sulfosalts
B : With essential Pb
3.6.4.1

3 : SULFOSALTS
6 : 2 < ø < 2.49
5.6.12

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

Physical Properties of PlayfairiteHide

Metallic
Transparency:
Opaque
Colour:
Lead gray to black
Streak:
Black
Hardness:
3½ - 4 on Mohs scale
Hardness:
VHN50=154 kg/mm2 - Vickers
Cleavage:
Perfect
on {100}
Density:
5.72 g/cm3 (Calculated)

Chemical Properties of PlayfairiteHide

Formula:
Pb16(Sb,As)19S44Cl

Originally assumed to be Pb16Sb18S43.
Common Impurities:
As

Crystallography of PlayfairiteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 45.12 Å, b = 8.29 Å, c = 21.45 Å
β = 92.53°
Ratio:
a:b:c = 5.443 : 1 : 2.587
Unit Cell V:
8,015.44 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Tabular crystals
Twinning:
Very fine twin lamellae

Type Occurrence of PlayfairiteHide

Synonyms of PlayfairiteHide

Other Language Names for PlayfairiteHide

German:Playfairit
Spanish:Playfairita

Related Minerals - Nickel-Strunz GroupingHide

2.LB.05MiharaiteCu4FePbBiS6Orth.
2.LB.30ArdaitePb19Sb13S35Cl7Mon.
2.LB.30LaunayiteCuPb10(Sb,As)12S20Mon.
2.LB.30MadocitePb19(Sb,As)16S43Orth.
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)21(Pb,Bi)2S13Orth.
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
5.6.11LaunayiteCuPb10(Sb,As)12S20Mon.
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)
5.6.25CannizzariteMon. 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 (?)

Fluorescence of PlayfairiteHide

Not fluorescent in UV

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 PlayfairiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
JAMBOR, John Leslie (1967) New lead sulfantimonides from Madoc, Ontario. Canadian Mineralogist, 9, 7-24.
JAMBOR, John Leslie (1967) New lead sulfantimonides from Madoc, Ontario. 2. Mineral descriptions. Canadian Mineralogist, 9, 191-213.
JAMBOR, John Leslie (1968) New lead sulfantimonides from Madoc, Ontario. 3. Syntheses, paragenesis, origin. Canadian Mineralogist, 10, 507-521.
JAMBOR, John Leslie, LAFLAMME, J. H. G. and WALKER, D. A. (1982) A re-examination of the Madoc sulfosalts. Mineralogical Record, 13, 93-100.

Internet Links for PlayfairiteHide

Localities for PlayfairiteHide

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. 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.
France
 
  • Provence-Alpes-Côte d'Azur
    • Hautes-Alpes
      • Orpierre
Y. Moelo et al. : "Playfairite,(chlorosulfosel de plomb) du gisement des Cougnasses (Hautes Alpes), Bull. Soc. Fr. Minéral. Cristallogr. , 1987
Kyrgyzstan
 
  • Osh Oblast
    • Alai Range (Alay Range)
      • Fergana Valley
Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
USA
 
  • Nevada
    • Lander Co.
NBMG Spec. Pub. 31 Minerals of Nevada
Mineral and/or Locality  
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