Atokite Mineral Data

General Atokite Information

Chemical Formula:

(Pd,Pt)3Sn

Composition:

Molecular Weight = 504.47 gm

Tin 23.53 % Sn

Palladium 47.47 % Pd

Platinum 29.00 % Pt

______

100.00 %

Empirical Formula:

Pd_2.25Pt_0.75Sn

Environment:

As very sparse grains in concentrates of ore.

IMA Status:

Approved IMA 1975

Locality:

In the Rustenburg and Atok platinum mines, on the Merensky Reef, Bushveld Complex, about 48 km southeast of Pietersburg, Transvaal, South Africa. Link to MinDat.org Location Data.

Name Origin:

For the Atok mine, South Africa.

Name Pronunciation:

Atokite

Synonym:

ICSD 40335

PDF 29-967

Atokite Image

Images:

Atokite Taimyrite

Comments: Photomicrograph (oil immersion) of atokite and taimyrite intergrowth inside tetraauricupride reaction rim on Pt-Fe alloy. Outlined section shows atokite relics within taimyrite. (CanMin, v 42, p 610).
Location: Kondyor PGE placer, Khabarovskiy Kray, eastern Siberia, Russia,. Scale: See Image.
© Canadian Mineralogist

Images:

Atokite Sobolevskite

Comments: Back-scattered electron image showing a) intergrowth of atokite, mertieite-II [Pd8Sb3] and telluroan sobolevskite [(Pd,Pt)(Bi,Te)] within tetra-auricupride rim. (CanMin, v 42, p 611).
Location: Kondyor PGE placer, Khabarovskiy Kray, eastern Siberia, Russia. Scale: See Image.
© Canadian Mineralogist

Images:

Atokite Palarstanide

Comments: Polished Section (PPL) showing light gray euhedral palarstanide (P) surrounded by white atokite (A) in light brownish cubanite (C).
Location: Talnakh, Ural, Russia. Scale: Picture Size 0.14 mm.
© Thomas Witzke

Atokite Crystallography

Cell Dimensions:

a = 3.991, Z = 1; V = 63.57 Den(Calc)= 13.18

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): 1.202(1), 2.295(1), 1.408(0.9),

Crystal Structure:

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Mihalik P , Hiemstra S A , de Villiers J P R , The Canadian Mineralogist , 13 (1975) p.146-150, Rustenburgite and atokite, two new platinum-group minerals from the, Merensky Reef, Bushveld igneous complex, Locality: the Rustenburg and Atok Platinum Mines in the Bushveld Igneous complex, South Africa

View Additional jPOWD Structure files for Atokite
[1] [2]

Physical Properties of Atokite

Color:

White.

Density:

14.9

Diaphaneity:

Opaque

Hardness:

5 - Apatite

Luster:

Metallic

Optical Properties of Atokite

RL Anisotrophism:

Slight due to strain.

RL Color:

Light cream.

RL Pleochroism:

None to slight.

Calculated Properties of Atokite

Electron Density:

Bulk Density (Electron Density)=11.1 gm/cc
note: Specific Gravity of Atokite =13.2 gm/cc.

Fermion Index:

Fermion Index = 0.24
Boson Index = 0.76

Photoelectric:

PE_Atokite= 642.22 barns/electron
U=PE_Atokite x rElectron Density=7,114.33 barns/cc.

Radioactivity:

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

Atokite Classification

Dana Class:

01.02.05.03 (01)Native Elements

(01.02)with platinum group metals and alloys

(01.02.05)Isoferroplatinum group (Space Group Pm3m)

01.02.05.01 Isoferroplatinum (Pt,Pd)3(Fe,Cu) P m3m 4/m 3 2/m

01.02.05.02 Rustenburgite (Pt,Pd)3Sn F m3m 4/m 3 2/m

01.02.05.03 Atokite (Pd,Pt)3Sn F m3m 4/m 3 2/m

01.02.05.04 Zvyagintsevite Pd3Pb P m3m 4/m 3 2/m

01.02.05.05 Chengdeite Ir3Fe P m3m 4/m 3 2/m

01.02.05.06 Yixunite! Pt3In P m3m 4/m 3 2/m

Strunz Class:

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

01.A - Metals and Intermetallic Alloys

01.AG -PGE-metal alloys

01.AG.10 Atokite (Pd,Pt)3Sn F m3m 4/m 3 2/m

01.AG.10 Rustenburgite (Pt,Pd)3Sn F m3m 4/m 3 2/m

01.AG.10 Zvyagintsevite Pd3Pb P m3m 4/m 3 2/m

Other Atokite Information

References:

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

See Also:

Links to other databases for Atokite :
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

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Ask about Atokite here :
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Print or Cut-and-Paste your Atokite Specimen Label here :

Atokite

(Pd,Pt)3Sn
Dana No: 01.02.05.03 Strunz No: 01.AG.10
Locality:

Notes: