Tolovkite Mineral Data

Tolovkite Mineral Data +

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General Tolovkite Information

Chemical Formula:

IrSbS

Composition:

Molecular Weight = 346.04 gm

Antimony 35.18 % Sb

Iridium 55.55 % Ir

Sulfur 9.27 % S

______

100.00 %

Empirical Formula:

IrSbS

Environment:

In placers derived from an Alpine-type gabbo massif.

IMA Status:

Approved IMA 1981

Locality:

Ust'-Bel'skii massif, Tolvka River, Northeastern Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

ICSD 74630

PDF 35-656

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Tolovkite Crystallography

Cell Dimensions:

a = 6.027, Z = 4; V = 218.93 Den(Calc)= 10.50

Crystal System:

Isometric - TetartoidalH-M Symbol (2 3) Space Group: P 2₁3

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

By Intensity(I/I_o): 1.813(1), 1.146(0.9), 2.99(0.9),

Crystal Structure:

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Bayliss P , American Mineralogist , 74 (1989) p.1168-1176, Crystal chemistry and crystallography of some minerals within the pyrite group

Physical Properties of Tolovkite

Cleavage:

None

Color:

Steel gray.

Density:

10.5

Diaphaniety:

Opaque

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Hardness:

7.5 - Garnet

Luster:

Metallic

Optical Properties of Tolovkite

RL Color:

Gray with a pale brown tint.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Tolovkite in Air**
λ	R	∑ R(λ)
442 nm	36.70
468 nm	39.00
484 nm	39.90
525 nm	42.00
554 nm	42.50
586 nm	42.90
621 nm	43.50
666 nm	43.80
699 nm	44.00

**Calculated Relative Intensity Colors of Tolovkite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	230%
R

Calculated Properties of Tolovkite

Electron Density:

r_electron=8.74 gm/cc
note: r_Tolovkite=10.5 gm/cc.

Fermion Index

Fermion Index = 0.00069
Boson Index = 0.99931

Photoelectric:

PE_Tolovkite= 951.75 barns/electron
U=PE_Tolovkite x r_electron=8,317.28 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Tolovkite is Not Radioactive

Tolovkite Classification

Dana Class:

2.12.3.5 (2)Sulfides - Including Selenides and Tellurides

(2.12)where Am Bn Xp, with (m+n):p=1:2

(2.12.3)Cobaltite Group (Cubic or pseudocubic crystals)

2.12.3.1 Cobaltite CoAsS P ca2₁ mm2

2.12.3.2 Gersdorffite NiAsS P 2₁3 2 3

2.12.3.3 Ullmannite NiSbS P 2₁3 2 3

2.12.3.4 Willyamite (Co,Ni)SbS P 2₁3 2 3

2.12.3.5 Tolovkite IrSbS P 2₁3 2 3

2.12.3.6 Platarsite (Pt,Rh,Ru)AsS P a3 2/m 3

2.12.3.7 Irarsite (Ir,Ru,Rh,Pt)AsS P a3 2/m 3

2.12.3.8 Hollingworthite (Rh,Pt,Pd)AsS P a3 2/m 3

2.12.3.9 Jolliffeite (Ni,Co)AsSe P a3 2/m 3

2.12.3.10 Padmaite PdBiSe P 2₁3 2 3

2.12.3.11 Michenerite (Pd,Pt)BiTe P 2₁3 2 3

2.12.3.12 Maslovite PtBiTe P 2₁3 2 3

2.12.3.13 Testibiopalladite PdTe(Sb,Te) P 2₁3 2 3

2.12.3.14 Changchengite! IrBiS P 2₁3 2 3

2.12.3.15 Milotaite! PdSbSe P 2₁/3 2 3

2.12.3.16 IMA2004-047! PdAsSe Pa3 4/m 2/m 2/m

Strunz Class:

II/D.18-80 II - Sulfides and sulphosalts

II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold

II/D.18 - Cobaltite group, Cobaltite - Ullmannite - Tolovkite series

II/D.18-10 Cobaltite CoAsS P ca2₁ mm2

II/D.18-20 Gersdorffite NiAsS P 2₁3 2 3

II/D.18-25 Jolliffeite (Ni,Co)AsSe P a3 2/m 3

II/D.18-30 Willyamite (Co,Ni)SbS P 2₁3 2 3

II/D.18-40 Ullmannite NiSbS P 2₁3 2 3

II/D.18-50 Hollingworthite (Rh,Pt,Pd)AsS P a3 2/m 3

II/D.18-60 Irarsite (Ir,Ru,Rh,Pt)AsS P a3 2/m 3

II/D.18-70 Platarsite (Pt,Rh,Ru)AsS P a3 2/m 3

II/D.18-80 Tolovkite IrSbS P 2₁3 2 3

Other Tolovkite Information

References:

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

See Also:

Links to other databases for Tolovkite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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

Tolovkite

IrSbS
Dana No: 2.12.3.5 Strunz No: II/D.18-80
Locality:

Notes: