Atokite Mineral Data

Atokite Mineral Data +

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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.

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

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

Diaphaniety:

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:

r_electron=11.1 gm/cc
note: r_Atokite=13.2 gm/cc.

Fermion Index

Fermion Index = 0.24312
Boson Index = 0.75688

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Atokite is Not Radioactive

Atokite Classification

Dana Class:

1.2.5.3 (1)Native Elements

(1.2)with platinum group metals and alloys

(1.2.5)Isoferroplatinum group (Space Group Pm3m)

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

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

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

1.2.5.4 Zvyagintsevite (Pd,Pt,Au)3(Pb,Sn) P m3m 4/m 3 2/m

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

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

Strunz Class:

I/A.16-20 I - Elements

I/A - Metallic and intermetallic compounds, Platinum-Iron-compounds with Tin/Lead and related compunds

I/A.16 - Zvyagintsevite - Plumbopalladinite series

I/A.16-10 Zvyagintsevite (Pd,Pt,Au)3(Pb,Sn) P m3m 4/m 3 2/m

I/A.16-20 Atokite (Pd,Pt)3Sn F m3m 4/m 3 2/m

I/A.16-30 Rustenburgite (Pt,Pd)3Sn F m3m 4/m 3 2/m

I/A.16-40 Niggliite PtSn P 6₃/mmc 6/m 2/m 2/m

I/A.16-50 Stannopalladinite (Pd,Cu)3Sn2(?) P 6₃/mmc 6/m 2/m 2/m

I/A.16-60 Palarstanide Pd8(Sn,As)3 P 6₃22 6 2 2

I/A.16-70 Plumbopalladinite Pd3Pb2 P 6₃/mmc 6/m 2/m 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 -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 -École des Mines de Paris

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Atokite

(Pd,Pt)3Sn
Dana No: 1.2.5.3 Strunz No: I/A.16-20
Locality:

Notes: