Iridisite Mineral Data

General Iridisite Information

Chemical Formula:

(Ir,Cu,Rh,Ni,Pt)S2

Composition:

Molecular Weight = 186.82 gm

Copper 10.20 % Cu

Nickel 3.14 % Ni

Iridium 30.87 % Ir

Platinum 10.44 % Pt

Rhodium 11.02 % Rh

Sulfur 34.33 % S

______

100.00 %

Empirical Formula:

Ir_0.3Cu_0.3Rh_0.2Ni_0.1Pt_0.1S₂

Environment:

Heavy mineral concentrate from placers derived from nearby ultramafic rocks.

IMA Status:

Not Approved IMA

Locality:

Unstated locality in China. Link to MinDat.org Location Data.

Name Origin:

The name is intended to distinguish the mineral from "normal" iridium sulfide.

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Iridisite Crystallography

Cell Dimensions:

a = 5.635, Z = 8; V = 178.93 Den(Calc)= 13.87

Crystal System:

IsometricSpace Group: Unk

Physical Properties of Iridisite

Color:

Steel gray.

Diaphaneity:

Opaque

Hardness:

7 - Quartz

Luster:

Metallic

Streak:

black

Optical Properties of Iridisite

RL Anisotrophism:

None.

RL Bireflectance:

None.

RL Color:

Grayish brownish white.

RL Pleochroism:

None.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Iridisite in Air**
λ	R₁	R₂		∑ R₁(λ)	∑ R₂(λ)
402 nm	43.70	43.40

439 nm

45.40

44.00

480 nm

45.40

44.10

495 nm

46.30

44.40

546 nm

47.30

44.70

590 nm

47.30

44.80

624 nm

47.40

45.20

644 nm

47.10

45.40

657 nm

46.70

44.70

**Calculated Relative Intensity Colors of Iridisite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	200%
R₁
R₂

Calculated Properties of Iridisite

Electron Density: Bulk Density (Electron Density)=12.4 gm/cc
note: Specific Gravity of Iridisite =13.9 gm/cc.

Fermion Index: Fermion Index = 0.03
Boson Index = 0.97

Photoelectric: PE_Iridisite= 612.17 barns/electron
U=PE_Iridisite x rElectron Density=7,580.85 barns/cc.

Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Iridisite is Not Radioactive

Iridisite Classification

Dana Class: 02.00.00.00 (02)Sulfide Minerals (02.00)Without Dana Classification Numbers (02.00.00)Sulfide

02.00.00.00 Argentite* Ag2S I m3m 4/m 3 2/m

02.00.00.00 Bayankhanite? Cu6HgS4 Unk Hex

02.00.00.00 Bismutoplagionite* 5PbS.4Bi2S3 Unk Ortho

02.00.00.00 Bravoite? (Fe,Ni,Co)S2 P a3 2/m 3

02.00.00.00 Colimaite K3VS4 P nma 2/m 2/m 2/m

02.00.00.00 Dayingite* CuCoPtS4 F m3m 4/m 3 2/m

02.00.00.00 Dilithium* Li2Te P 222 2 2 2

02.00.00.00 Dzhezkazganite* (Pb,Cu,Rh)S2(?) P a3? 2/m 3

02.00.00.00 Ferdisilicite* FeSi2 P 4/mmm 4/m 2/m 2/m

02.00.00.00 Fersilicite* FeSi P 2₁3 2 3

02.00.00.00 Horobetsuite* (Bi,Sb)2S3 Pbnm 2/m 2/m 2/m

02.00.00.00 Horomanite Fe6Ni3S8 P 4/mmm 4mm

02.00.00.00 Imgreite? NiTe P 6₃/mmc 6/m 2/m 2/m

02.00.00.00 Iridisite* (Ir,Cu,Rh,Ni,Pt)S2 Unk Cubic

02.00.00.00 Isochalcopyrite? Cu8Fe9S16 Unk Cubic

02.00.00.00 Jaipurite* CoS P 6₃/mmc 6/m 2/m 2/m

02.00.00.00 Kitaibelite? Ag10PbBi30S51 Mono ? Mono

02.00.00.00 Kurilite? (Ag,Au)2(Te,Se,S) P m3n,P 4₃n Cubic

02.00.00.00 Plumosite* Pb2Sb2S5 Mono

02.00.00.00 Protojoseite* Bi4TeS2(?) R 3m 3 2/m

02.00.00.00 Samaniite Cu2Fe5Ni2S8 P 4₁/mmm 4mm

02.00.00.00 Stibioenargite* Cu3(Sb,As)S4 Unk Ortho

02.00.00.00 Sztrokayite* Bi3TeS2 Trig ? Trig

02.00.00.00 Volfsonite* Cu10CuFeFe2Sn3S16 P 4₂m-,P 42₁2 Tetra

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 Iridisite Information

References: NAME( AmMin v74:1215) PHYS. PROP.(Am.Min.,Vol.81,1996) OPTIC PROP.(AmMin v74:1215)

See Also: Links to other databases for Iridisite :
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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Print or Cut-and-Paste your Iridisite Specimen Label here :

Iridisite

(Ir,Cu,Rh,Ni,Pt)S2
Dana No: 02.00.00.00 Strunz No: 02.XX.00
Locality:

Notes: