Playfairite Mineral Data

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General Playfairite Information

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.

Name Pronunciation:

Playfairite + Pronunciation

Synonym:

IMA1966-019

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Playfairite Crystallography

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

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.32(1), 3.39(1), 2.785(0.7),

Physical Properties of Playfairite

Cleavage:

{100} Perfect

Color:

Lead gray, Black.

Density:

5.8

Diaphaneity:

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

RL Pleochroism:

Strong, white to brownish gray.

Calculated Properties of Playfairite

Electron Density:

Bulk Density (Electron Density)=4.84 gm/cc
note: Specific Gravity of Playfairite =5.71 gm/cc.

Fermion Index:

Fermion Index = 0.1
Boson Index = 0.9

Photoelectric:

PE_Playfairite= 983.67 barns/electron
U=PE_Playfairite x rElectron Density=4,760.63 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Playfairite is Not Radioactive

Playfairite Classification

Dana Class:

03.06.04.01 (03)Sulfides - Sulfosalts

(03.06)where 2 < z/y < 2.49 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(03.06.04)Dana Group

03.06.04.01 Playfairite Pb16Sb18S43 P 2₁/m 2/m

Strunz Class:

02.LB.55 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.L - Unclassified Sulfosalts

02.LB -With essential Pb

02.LB.55 Playfairite Pb16Sb18S43 P 2₁/m 2/m

Other Playfairite Information

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 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info

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Print or Cut-and-Paste your Playfairite Specimen Label here :

Playfairite

Pb16Sb18S43
Dana No: 03.06.04.01 Strunz No: 02.LB.55
Locality:

Notes: