Ferrorhodsite Mineral Data

General Ferrorhodsite Information

Chemical Formula:

(Fe,Cu)(Rh,Ir,Pt)2S4

Composition:

Molecular Weight = 417.75 gm

Iron 7.62 % Fe

Copper 6.39 % Cu

Iridium 10.58 % Ir

Platinum 2.33 % Pt

Rhodium 42.37 % Rh

Sulfur 30.70 % S

______

100.00 %

Empirical Formula:

Fe²⁺_0.57Cu_0.42Rh_1.72Ir_0.23Pt_0.05S₄

Environment:

Found as inclusions in isoferroplatinum in dunnite. The iron dominant analog of cuprorodsite.

IMA Status:

Approved IMA 1996

Locality:

Gold-platinum placers in the Chadsky and Kondersky dunite massifs, Yakutia-Saha, Russia. Link to MinDat.org Location Data.

Name Origin:

For it's composition and relationship to cuprorhodsite.

Synonym:

IMA1996-047

Ferrorhodsite Image

Images:

Ferrorhodsite

Comments: Epoxy grain mount of ferrorhodsite grains.
Location: Yukhtochka placer, tributary of South Aldan River, Yakutia, Russia. Scale: Scale Bar 100 µm.
© Diederik Visser

Ferrorhodsite Crystallography

Cell Dimensions:

a = 9.89, Z = 8; V = 967.36 Den(Calc)= 5.74

Crystal System:

Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m

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

By Intensity(I/I_o): 2.99(1), 1.75(0.9), 2.471(0.8),1.93(0.7), 1.009(0.3), 1.674(0.3),

Physical Properties of Ferrorhodsite

Cleavage:

None

Color:

Black.

Density:

5.71

Diaphaneity:

Opaque

Fracture:

Fragile - Crystals with a delicate and easily injured structure.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Habit:

Inclusions - Generally found as inclusions in other minerals.

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Metallic

Streak:

black

Optical Properties of Ferrorhodsite

RL Color:

Gray.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Ferrorhodsite in Air**
λ	R	∑ R(λ)
450 nm	40.90
480 nm	41.50
520 nm	41.90
560 nm	41.80
600 nm	41.80
640 nm	41.80
680 nm	41.70
720 nm	41.80

**Calculated Relative Intensity Colors of Ferrorhodsite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	220%
R

Calculated Properties of Ferrorhodsite

Electron Density:

Bulk Density (Electron Density)=5.22 gm/cc
note: Specific Gravity of Ferrorhodsite =5.74 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Ferrorhodsite}= 275.65 barns/electron
U=PE_{Ferrorhodsite} x rElectron Density=1,439.36 barns/cc.

Radioactivity:

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

Ferrorhodsite Classification

Dana Class:

02.10.01.18 (02)Sulfides - Including Selenides and Tellurides

(02.10)where Am Bn Xp, with (m+n):p=3:4

(02.10.01)Linnaeite Group (Isometric: Fd3m)

02.10.01.01 Linnaeite CoCo2S4 F d3m 4/m 3 2/m

02.10.01.02 Carrollite Cu(Co,Ni)2S4 F d3m 4/m 3 2/m

02.10.01.03 Fletcherite Cu(Ni,Co)2S4 F d3m 4/m 3 2/m

02.10.01.04 Tyrrellite (Cu,Co,Ni)3Se4 F d3m 4/m 3 2/m

02.10.01.05 Bornhardtite CoCo2Se4 F d3m 4/m 3 2/m

02.10.01.06 Siegenite (Ni,Co)3S4 F d3m 4/m 3 2/m

02.10.01.07 Polydymite NiNi2S4 F d3m 4/m 3 2/m

02.10.01.08 Violarite FeNi2S4 F d3m 4/m 3 2/m

02.10.01.09 Trustedtite Ni3Se4 F d3m 4/m 3 2/m

02.10.01.10 Greigite FeFe2S4 F d3m 4/m 3 2/m

02.10.01.11 Daubreelite FeCr2S4 F d3m 4/m 3 2/m

02.10.01.12 Indite FeIn2S4 F d3m 4/m 3 2/m

02.10.01.13 Kalininite ZnCr2S4 F d3m 4/m 3 2/m

02.10.01.14 Florensovite Cu(Cr1.5Sb0.5)S4 F d3m 4/m 3 2/m

02.10.01.15 Cuproiridsite CuIr2S4 F d3m 4/m 3 2/m

02.10.01.16 Cuprorhodsite CuRh2S4 F d3m 4/m 3 2/m

02.10.01.17 Malanite Cu(Pt,Ir)2S4 F d3m 4/m 3 2/m

02.10.01.18 Ferrorhodsite (Fe,Cu)(Rh,Ir,Pt)2S4 F d3m 4/m 3 2/m

02.10.01.19 Cadmoindite! CdIn2S4 F d3m 4/m 3 2/m

Strunz Class:

02.DA.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.DA -M:S = 3:4

02.DA.05 Bornhardtite CoCo2Se4 F d3m 4/m 3 2/m

02.DA.05 Florensovite Cu(Cr1.5Sb0.5)S4 F d3m 4/m 3 2/m

02.DA.05 Carrollite Cu(Co,Ni)2S4 F d3m 4/m 3 2/m

02.DA.05 Fletcherite Cu(Ni,Co)2S4 F d3m 4/m 3 2/m

02.DA.05 Cuproiridsite CuIr2S4 F d3m 4/m 3 2/m

02.DA.05 Cuprorhodsite CuRh2S4 F d3m 4/m 3 2/m

02.DA.05 Dayingite* CuCoPtS4 F m3m 4/m 3 2/m

02.DA.05 Daubreelite FeCr2S4 F d3m 4/m 3 2/m

02.DA.05 Ferrorhodsite (Fe,Cu)(Rh,Ir,Pt)2S4 F d3m 4/m 3 2/m

02.DA.05 Greigite FeFe2S4 F d3m 4/m 3 2/m

02.DA.05 Indite FeIn2S4 F d3m 4/m 3 2/m

02.DA.05 Linnaeite CoCo2S4 F d3m 4/m 3 2/m

02.DA.05 Kalininite ZnCr2S4 F d3m 4/m 3 2/m

02.DA.05 Malanite Cu(Pt,Ir)2S4 F d3m 4/m 3 2/m

02.DA.05 Polydymite NiNi2S4 F d3m 4/m 3 2/m

02.DA.05 Violarite FeNi2S4 F d3m 4/m 3 2/m

02.DA.05 Tyrrellite (Cu,Co,Ni)3Se4 F d3m 4/m 3 2/m

02.DA.05 Siegenite (Ni,Co)3S4 F d3m 4/m 3 2/m

02.DA.05 Xingzhongite (Pb,Cu,Fe)(Ir,Pt,Rh)2S4 F d3m 4/m 3 2/m

02.DA.05 Trustedtite Ni3Se4 F d3m 4/m 3 2/m

02.DA.05 Cadmoindite! CdIn2S4 F d3m 4/m 3 2/m

Other Ferrorhodsite Information

References:

NAME( MinRec, V31, No. 2) PHYS. PROP.(MinRec, V 31, No. 2) OPTIC PROP.(AmMin, v 84, p 1685)

See Also:

Links to other databases for Ferrorhodsite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Ferrorhodsite

(Fe,Cu)(Rh,Ir,Pt)2S4
Dana No: 02.10.01.18 Strunz No: 02.DA.05
Locality:

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