Mineralogy Database

Playfairite Mineral Data

Search Webmineral :

General Playfairite Information

Help on Chemical  Formula: Chemical Formula: Pb16Sb18S43
Help on Composition: Composition: Molecular Weight = 6,885.54 gm
   Antimony  31.83 %  Sb
   Lead      48.15 %  Pb
   Sulfur    20.03 %  S
            100.00 % 
Help on Empirical Formula: Empirical Formula: Pb16Sb18S43
Help on Environment: Environment: As masses and stringer through dolomitic and calcitic marbles. Found at the edges of other sulfosalt minerals.
Help on IMA Status: IMA Status: Approved IMA 1967
Help on Locality: Locality: Taylor pit, near Madoc, Huntingdon Township, Hastings County, Ontario, Canada Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for John Playfair (1748-1819), Professor of Natural Philosophy, Edinburgh, Scotland.
Help on Name Pronunciation: Name Pronunciation: Playfairite + Pronunciation Say PLAYFAIRITE
Help on Synonym: Synonym: IMA1966-019

Playfairite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =10.9011:1:5.1824
Help on Cell Dimensions: Cell Dimensions: a = 45.12, b = 4.139, c = 21.45, Z = 2; beta = 92.53° V = 4,001.92 Den(Calc)= 5.71
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.32(1), 3.39(1), 2.785(0.7),

Physical Properties of Playfairite

Help on Cleavage: Cleavage: {100} Perfect
Help on Color: Color: Lead gray, Black.
Help on Density: Density: 5.8
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Striated - Parallel lines on crystal surface or cleavage face.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luster: Luster: Metallic
Help on Streak: Streak: black

Optical Properties of Playfairite

Help on RL Pleochroism: RL Pleochroism: Strong, white to brownish gray.

Calculated Properties of Playfairite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.84 gm/cc
note: Specific Gravity of Playfairite =5.71 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.1
Boson Index = 0.9
Help on Photoelectric: Photoelectric: PEPlayfairite = 983.67 barns/electron
U=PEPlayfairite x rElectron Density=4,760.63 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Playfairite is Not Radioactive

Playfairite Classification

Help on  Dana Class: Dana Class: (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 Playfairite Pb16Sb18S43 P 21/m 2/m
Help on  Strunz Class: 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

Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: 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:

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

Visit our Advertisers 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 Espa´┐Żol

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


Dana No: Strunz No: 02.LB.55





Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.