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Platynite Mineral Data

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General Platynite Information

Help on Chemical  Formula: Chemical Formula: (Bi,Pb)3(Se,S)4
Help on Composition: Composition: Molecular Weight = 894.11 gm
   Bismuth   46.75 %  Bi
   Lead      23.17 %  Pb
   Selenium  26.49 %  Se
   Sulfur     3.59 %  S
            100.00 % 
Help on Empirical Formula: Empirical Formula: Bi2PbSe3S
Help on Environment: Environment: Discredited as being a mixture of laitakarite and selenian galena.
Help on IMA Status: IMA Status: Discredited IMA 1999 - Valid Species (Pre-IMA) 1910
Help on Locality: Locality: Falun, Dalecarlia, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named in 1910 from the Greek "to broaden", in allusion to its platy habit.
Help on Name Pronunciation: Name Pronunciation: Platynite + Pronunciation Say PLATYNITE
Help on Synonym: Synonym: Discredited

Platynite Image

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  Platynite   Paraguanajuatite

Comments: Bright metallic gray platy crystalline platynite, with dull black paraguanajuatite.
Location: Falun, Kopparberg, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Platynite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.44994
Help on Cell Dimensions: Cell Dimensions: a = 8.49, c = 20.8, Z = 8; V = 1,298.40 Den(Calc)= 9.15
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.965(1), 2.971(0.4), 5.45(0.2),

Physical Properties of Platynite

Help on Cleavage: Cleavage: {001} Good, {010} Good, {100} Good
Help on Color: Color: Gray, Black, White.
Help on Density: Density: 7.98
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luster: Luster: Metallic
Help on Streak: Streak: shining black

Optical Properties of Platynite

Help on RL Anisotrophism: RL Anisotrophism: Strong.

Calculated Properties of Platynite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=7.49 gm/cc
note: Specific Gravity of Platynite =9.15 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.07
Boson Index = 0.93
Help on Photoelectric: Photoelectric: PEPlatynite =1,376.33 barns/electron
U=PEPlatynite x rElectron Density=10310.12 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Platynite is Not Radioactive

Platynite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.08)where Am Bn Xp, with (m+n):p=1:1
  (02.08.21)Dana Group Platynite? (Bi,Pb)3(Se,S)4 R 3m 3 2/m
Help on  Strunz Class: Strunz Class: 02.DC.05 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.D - Metal Sulfides, M:S = 3:4 and 2:3
  02.DC -Variable M:S
02.DC.05 Platynite? (Bi,Pb)3(Se,S)4 R 3m 3 2/m

Other Platynite Information

Help on References: References: NAME( CanMin, 10/99) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Platynite :
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 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 02.DC.05





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