| |
 |
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 |
| |
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 - Prismatic H-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
|
| 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: |
PEPlayfairite = 983.67 barns/electron
U=PEPlayfairite 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 :
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
Espaņol
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:
|
|
| |
| |
|
| |
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.