Playfairite Mineral Data

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

Search for Playfairite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

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 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

Search for Playfairite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Playfairite :

A Bijoux Google Search for Playfairite
Adam's Minerals Google Search for Playfairite
Cape Minerals Google Search for Playfairite
Dakota Matrix Minerals Google Search for Playfairite
Excalibur Mineral Corp. Google Search for Playfairite
Exceptional Minerals Google Search for Playfairite
John Betts Fine Minerals Search for Playfairite
McDougall Minerals Google Search for Playfairite
Mineral News Website Link
Rock and Mineral Shows Google Search for Playfairite
Weinrich Minerals, Inc. Google Search for Playfairite

Ask about Playfairite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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: