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Platynite Mineral Data
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General Platynite Information
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 Chemical Formula: |
(Bi,Pb)3(Se,S)4 |
| Composition: |
Molecular Weight = 894.11 gm |
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Bismuth 46.75 % Bi |
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Lead 23.17 % Pb |
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Selenium 26.49 % Se |
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Sulfur 3.59 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Bi2PbSe3S |
| Environment: |
Discredited as being a mixture of laitakarite and selenian galena. |
| IMA Status: |
Discredited IMA 1999 - Valid Species (Pre-IMA) 1910 |
| Locality: |
Falun, Dalecarlia, Sweden. Link to MinDat.org Location Data. |
| Name Origin: |
Named in 1910 from the Greek "to broaden", in allusion to its platy habit. |
| Name Pronunciation: |
Platynite + Pronunciation  |
| Synonym: |
Discredited |
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IMA1999-A |
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Platynite Image |
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Images:
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Platynite Crystallography
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| Axial Ratios: |
a:c = 1:2.44994 |
| Cell Dimensions: |
a = 8.49, c = 20.8, Z = 8; V = 1,298.40 Den(Calc)= 9.15 |
| Crystal System: |
Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m |
| X Ray Diffraction: |
By Intensity(I/Io): 3.965(1), 2.971(0.4), 5.45(0.2), |
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Physical Properties of Platynite
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| Cleavage: |
{001} Good, {010} Good, {100} Good |
| Color: |
Gray, Black, White. |
| Density: |
7.98 |
| Diaphaneity: |
Opaque |
| Habit: |
Platy - Sheet forms (e.g. micas). |
| Hardness: |
2-3 - Gypsum-Calcite |
| Luster: |
Metallic |
| Streak: |
shining black |
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Optical Properties of Platynite
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| RL Anisotrophism: |
Strong. |
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Calculated Properties of Platynite
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| Electron Density: |
Bulk Density (Electron Density)=7.49 gm/cc
note: Specific Gravity of Platynite =9.15 gm/cc.
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| Fermion Index: |
Fermion Index = 0.07
Boson Index = 0.93 |
| Photoelectric: |
PEPlatynite =1,376.33 barns/electron
U=PEPlatynite x rElectron Density=10310.12 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Platynite is Not Radioactive |
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Platynite Classification
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| Dana Class: |
02.08.21.01 (02)Sulfides - Including Selenides and Tellurides |
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(02.08)where Am Bn Xp, with (m+n):p=1:1 |
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(02.08.21)Dana Group |
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02.08.21.01 Platynite? (Bi,Pb)3(Se,S)4 R 3m 3 2/m |
| Strunz Class: |
02.DC.05 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.D - Metal Sulfides, M:S = 3:4 and 2:3 |
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02.DC -Variable M:S |
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02.DC.05 Platynite? (Bi,Pb)3(Se,S)4 R 3m 3 2/m |
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Other Platynite Information
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| References: |
NAME( CanMin, 10/99) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| 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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Print or Cut-and-Paste your Platynite Specimen Label here :
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Platynite
(Bi,Pb)3(Se,S)4
Dana No: 02.08.21.01 Strunz No: 02.DC.05
Locality:
Notes:
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