Prassoite Mineral Data

General Prassoite Information

Help on Chemical  Formula: Chemical Formula: Rh17S15 (?)
Help on Composition: Composition: Molecular Weight = 2,230.38 gm
   Rhodium  78.43 %  Rh
   Sulfur   21.57 %  S
           ______ 
           100.00 % 
Help on Empirical Formula: Empirical Formula: Rh17S15
Help on Environment: Environment: Prassoite was approved as a valid species but never published. Miassite appearantly has priority as the valid name by publication.
Help on IMA Status: IMA Status: Approved IMA 1971 ? (Dana # Added)
Help on Locality: Locality: Tiébaghi massif, New Caledonia. Link to MinDat.org Location Data.
Help on Synonym: Synonym: ICSD 23930
  IMA1970-041
  PDF 73-1433
 

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Prassoite Crystallography

Help on Crystal System: Crystal System: Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: P m3m
 

Physical Properties of Prassoite

Help on Color: Color: White.
Help on Density: Density: 7.6 - 7.61, Average = 7.6
Help on Diaphaniety: Diaphaniety: Opaque
Help on Hardness: Hardness: 5-6 - Between Apatite and Orthoclase
Help on Luster: Luster: Metallic
 

Calculated Properties of Prassoite

Help on Electron Density: Electron Density:

relectron=6.85 gm/cc
note: rPrassoite =7.61 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00161
Boson Index = 0.99839
Help on Photoelectric: Photoelectric:

PEPrassoite = 171.51 barns/electron
U=PEPrassoite x relectron=1,175.43 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Prassoite is Not Radioactive

 

Prassoite Classification

Help on  Dana Class: Dana Class: 2.16.19.2a (2)Sulfides - Including Selenides and Tellurides
  (2.16)with miscellaneous formulae
  (2.16.19)Dana Group
 
2.16.19.1 Palladseite Pd17Se15 P m3m 4/m 3 2/m
 
2.16.19.2 Miassite! Rh17S15 P m3m 4/m 3 2/m
 
2.16.19.2a Prassoite ! Rh17S15(?) P m3m 4/m 3 2/m
Help on  Strunz Class: Strunz Class: II/B.16-80* II - Sulfides and sulphosalts
  II/B - Sulfides with metal: sulfur, selenium and tellurium > 1:1, Sulfides with predominant Nickel, Cobalt, Rhodium and Palladium
  II/B.16 - Pentlandite group
 
II/B.16-10 Pentlandite (Fe,Ni)9S8 F m3m 4/m 3 2/m
 
II/B.16-20 Cobaltpentlandite Co9S8 F m3m 4/m 3 2/m
 
II/B.16-30 Argentopentlandite Ag(Fe,Ni)8S8 F m3m 4/m 3 2/m
 
II/B.16-40 Geffroyite (Ag,Cu,Fe)9(Se,S)8 F m3m 4/m 3 2/m
 
II/B.16-50 Manganese-shadlunite (Mn,Pb)(Cu,Fe)8S8 F m3m 4/m 3 2/m
 
II/B.16-60 Shadlunite (Pb,Cd)(Fe,Cu)8S8 F m3m 4/m 3 2/m
 
II/B.16-70 Palladseite Pd17Se15 P m3m 4/m 3 2/m
 
II/B.16-80 Miassite! Rh17S15 P m3m 4/m 3 2/m
 
II/B.16-80* Prassoite Rh17S15(?) P m3m 4/m 3 2/m
 

Other Prassoite Information

Help on References: References: PHYS. PROP.(Am.Min.,Vol.74,p1220,1989)
Help on See Also: See Also: Links to other databases for Prassoite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 -École des Mines de Paris

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

Prassoite

Rh17S15 (?)
Dana No: 2.16.19.2a Strunz No: II/B.16-80*
Locality:

 

Notes:

 

 
   
 
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