Prassoite Mineral Data

General Prassoite Information

Chemical Formula:

Rh17S15 (?)

Composition:

Molecular Weight = 2,230.38 gm

Rhodium 78.43 % Rh

Sulfur 21.57 % S

______

100.00 %

Empirical Formula:

Rh₁₇S₁₅

Environment:

Prassoite was approved as a valid species but never published. Miassite appearantly has priority as the valid name by publication.

IMA Status:

Withdrawn IMA 2003 in favor of miassite, Approved IMA 1971 ? (Dana # Added)

Locality:

Tiebaghi massif, New Caledonia. Link to MinDat.org Location Data.

Name Origin:

No derivation of name stated.

Synonym:

ICSD 23930

IMA1970-041

PDF 73-1433

Prassoite Crystallography

Crystal System:

Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: P m3m

Physical Properties of Prassoite

Color:

White.

Density:

7.6 - 7.61, Average = 7.6

Diaphaneity:

Opaque

Hardness:

5-6 - Between Apatite and Orthoclase

Luster:

Metallic

Calculated Properties of Prassoite

Electron Density:

Bulk Density (Electron Density)=6.85 gm/cc
note: Specific Gravity of Prassoite =7.61 gm/cc.

Fermion Index:

Fermion Index = 0.0016174012
Boson Index = 0.9983825988

Photoelectric:

PE_Prassoite= 171.51 barns/electron
U=PE_Prassoite x rElectron Density=1,175.43 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Prassoite is Not Radioactive

Prassoite Classification

Dana Class:

02.16.19.02a (02)Sulfides - Including Selenides and Tellurides

(02.16)with miscellaneous formulae

(02.16.19)Palladseite Group

02.16.19.01 Palladseite Pd17Se15 P m3m 4/m 3 2/m

02.16.19.02 Miassite! Rh17S15 P m3m 4/m 3 2/m

02.16.19.02a Prassoite! Rh17S15(?) P m3m 4/m 3 2/m

Strunz Class:

02.XX.00 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.X - Unclassified Strunz SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarse

02.XX -Sulfide

02.XX.00 Isochalcopyrite? Cu8Fe9S16 Unk Cubic

02.XX.00 Bayankhanite? Cu6HgS4 Unk Hex

02.XX.00 Bravoite? (Fe,Ni,Co)S2 P a3 2/m 3

02.XX.00 Dzhezkazganite* (Pb,Cu,Rh)S2(?) P a3? 2/m 3

02.XX.00 Dilithium* Li2Te P 222 2 2 2

02.XX.00 Horobetsuite* (Bi,Sb)2S3 Pbnm 2/m 2/m 2/m

02.XX.00 Horsfordite? Cu5Sb Unk Cubic

02.XX.00 Kurilite? (Ag,Au)2(Te,Se,S) P m3n,P 4₃n Cubic

02.XX.00 Imgreite? NiTe P 6₃/mmc 6/m 2/m 2/m

02.XX.00 Matraite? ZnS R 3m 3m

02.XX.00 Iridisite* (Ir,Cu,Rh,Ni,Pt)S2 Unk Cubic

02.XX.00 Kitaibelite? Ag10PbBi30S51 Mono ? Mono

02.XX.00 Jeromite? As(S,Se)2 None

02.XX.00 Parajamesonite? Pb4FeSb6S14 Unk Ortho

02.XX.00 Volfsonite* Cu10CuFeFe2Sn3S16 P 4₂m-,P 42₁2 Tetra

02.XX.00 Prassoite Rh17S15(?) P m3m 4/m 3 2/m

02.XX.00 Sakharovaite? (Pb,Fe)(Bi,Sb)2S4 Mono

02.XX.00 Samaniite Cu2Fe5Ni2S8 P 4₁/mmm 4mm

02.XX.00 Tazieffite! Pb20Cd2(As,Bi)22S50Cl10 C 2/c 2/m

02.XX.00 Horomanite Fe6Ni3S8 P 4/mmm 4mm

Other Prassoite Information

References:

PHYS. PROP.(Am.Min.,Vol.74,p1220,1989)

See Also:

Links to other databases for Prassoite :
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 Prassoite Specimen Label here :

Prassoite

Rh17S15 (?)
Dana No: 02.16.19.02a Strunz No: 02.XX.00
Locality:

Notes:

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