Rhodium Mineral Data

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General Rhodium Information

Chemical Formula:

(Rh,Pt)

Composition:

Molecular Weight = 125.95 gm

Platinum 38.72 % Pt

Rhodium 61.28 % Rh

______

100.00 %

Empirical Formula:

Rh_0.75Pt_0.25

Environment:

Single grain found in a heavy mineral concentrate from a cummulate ultrabasic intrusion.

IMA Status:

Approved IMA 1974

Locality:

J-M Reef, Stillwater complex, Nye County, Montana, USA. Link to MinDat.org Location Data.

Name Origin:

Named from the Greek, rhodon = "rose" in allusion to the colored salts.

Name Pronunciation:

Rhodium

Synonym:

ICSD 64991

PDF 5-685

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Rhodium Crystallography

Cell Dimensions:

a = 3.856, Z = 4; V = 57.33 Den(Calc)= 14.59

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F m3m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 0.7874(1), 0.8623(0.8), 0.8847(0.7),

Crystal Structure:

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Wyckoff R W G , Crystal Structures , 1 (1963) p.7-83, Second edition. Interscience Publishers, New York, New York, Cubic closest packed, ccp, structure

Physical Properties of Rhodium

Color:

Tin white.

Density:

16.51

Diaphaneity:

Opaque

Hardness:

3.5 - Copper Penny

Luster:

Metallic

Optical Properties of Rhodium

RL Color:

Bright white.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Rhodium in Air**
λ	R	∑ R(λ)
470 nm	75.20
546 nm	72.60
589 nm	73.30
650 nm	75.70

**Calculated Relative Intensity Colors of Rhodium in Air**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%
R

Calculated Properties of Rhodium

Electron Density:

Bulk Density (Electron Density)=12.3 gm/cc
note: Specific Gravity of Rhodium =14.6 gm/cc.

Fermion Index:

Fermion Index = 0.13
Boson Index = 0.87

Photoelectric:

PE_Rhodium= 734.92 barns/electron
U=PE_Rhodium x rElectron Density=9,066.73 barns/cc.

Radioactivity:

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

Rhodium Classification

Dana Class:

01.02.01.03 (01)Native Elements

(01.02)with platinum group metals and alloys

(01.02.01)Platinum group (Space Group Fm3m)

01.02.01.01 Platinum Pt F m3m 4/m 3 2/m

01.02.01.02 Iridium (Ir,Os,Ru,Pt) F m3m 4/m 3 2/m

01.02.01.03 Rhodium (Rh,Pt) F m3m 4/m 3 2/m

01.02.01.04 Palladium Pd,Pt F m3m 4/m 3 2/m

Strunz Class:

01.AF.10 01 - ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)

01.A - Metals and Intermetallic Alloys

01.AF -Platinum-group elements

01.AF.10 Palladium Pd,Pt F m3m 4/m 3 2/m

01.AF.10 Iridium (Ir,Os,Ru,Pt) F m3m 4/m 3 2/m

01.AF.10 Rhodium (Rh,Pt) F m3m 4/m 3 2/m

01.AF.10 Platinum Pt F m3m 4/m 3 2/m

Other Rhodium Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Rhodium :
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
15 - WWW-MINCRYST

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Rhodium

(Rh,Pt)
Dana No: 01.02.01.03 Strunz No: 01.AF.10
Locality:

Notes: