Playfairite Mineral Data + 
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- 3.6.4.1 Playfairite Pb16Sb18S43 P 21/m 2/m
- II/E.20-10 Madocite Pb17(Sb,As)16S41 Pb2a mm2
- II/E.20-20 Launayite Pb22Sb26S61 C 2/m 2/m
- II/E.20-25 Pellouxite! (Cu,Ag)Pb10Sb12S27(Cl,S)0.6O C 2/m 2/m
- II/E.20-30 Sterryite Ag2Pb10(Sb,As)12S29 Pbam 2/m 2/m 2/m
- II/E.20-40 Playfairite Pb16Sb18S43 P 21/m 2/m
- II/E.20-50 Sorbyite Pb19(Sb,As)20S49 C 2/m 2/m
- II/E.20-60 Dadsonite Pb21Sb23S55Cl P 2,Pm,P 2/m Mono
General Playfairite Information |
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 Chemical Formula: |
Pb16Sb18S43 | ||
| Composition: |
Molecular Weight = 6,885.54 gm | ||
| Antimony 31.83 % Sb | |||
| Lead 48.15 % Pb | |||
| Sulfur 20.03 % S | |||
| ______ | |||
| 100.00 % | |||
| Empirical Formula: |
Pb16Sb18S43 | ||
| Environment: |
As masses and stringer through dolomitic and calcitic marbles. Found at the edges of other sulfosalt minerals. | ||
| IMA Status: |
Approved IMA 1967 | ||
| Locality: |
Taylor pit, near Madoc, Huntingdon Township, Hastings County, Ontario, Canada Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for John Playfair (1748-1819), Professor of Natural Philosophy, Edinburgh, Scotland. | ||
| Synonym: |
IMA1966-019 | ||
Search for Playfairite Images | |||
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Images:
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Playfairite Crystallography |
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| Axial Ratios: |
a:b:c =10.9011:1:5.1824 | ||
| Cell Dimensions: |
a = 45.12, b = 4.139, c = 21.45, Z = 2; beta = 92.53° V = 4,001.92 Den(Calc)= 5.71 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/m | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.32(1), 3.39(1), 2.785(0.7), | ||
Physical Properties of Playfairite |
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| Cleavage: |
[100] Perfect | ||
| Color: |
Lead gray, Black. | ||
| Density: |
5.8 | ||
| Diaphaniety: |
Opaque | ||
| Habit: |
Striated - Parallel lines on crystal surface or cleavage face. | ||
| Habit: |
Tabular - Form dimensions are thin in one direction. | ||
| Hardness: |
3.5-4 - Copper Penny-Fluorite | ||
| Luster: |
Metallic | ||
| Streak: |
black | ||
Optical Properties of Playfairite |
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| RL Pleochroism: |
Strong, white to brownish gray. | ||
Calculated Properties of Playfairite |
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| Electron Density: |
relectron=4.84 gm/cc |
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| Fermion Index |
Fermion Index = 0.1079 Boson Index = 0.8921 |
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| Photoelectric: |
PEPlayfairite = 983.67 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Playfairite is Not Radioactive |
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Playfairite Classification |
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| Dana Class: |
3.6.4.1 (3)Sulfides - Sulfosalts | ||
| (3.6)where 2 < z/y < 2.49 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals | |||
| (3.6.4)Dana Group | |||
| Strunz Class: |
II/E.20-40 II - Sulfides and sulphosalts | ||
| II/E - Sulfosalts (S : As,Sb,Bi = x), Sulfosalts with predominant Iron and Copper x = 2.0 | |||
| II/E.20 - Madocite - Dadsonite series | |||
Other Playfairite Information |
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| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) | ||
| See Also: |
Links to other databases for Playfairite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris Search for Playfairite using: Visit our Advertisers for Playfairite : Translate Playfairite Mineral Data : Ask about Playfairite here : Print or Cut-and-Paste your Playfairite Specimen Label here :
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