Daomanite Mineral Data

Daomanite Mineral Data +

General Daomanite Information

Chemical Formula:

CuPtAsS2

Composition:

Molecular Weight = 397.68 gm

Copper 15.98 % Cu

Arsenic 18.84 % As

Platinum 49.05 % Pt

Sulfur 16.13 % S

______

100.00 %

Empirical Formula:

CuPtAsS₂

Environment:

Chalcopyrite-bornite veins in hornblende pyroxenite.

IMA Status:

Not Approved IMA 1974

Locality:

Dao and Ma districts, Yanshan, China. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

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Daomanite Crystallography

Axial Ratios:

a:b:c =0.3686:1:0.2365

Cell Dimensions:

a = 5.852, b = 15.876, c = 3.756, Z = 4; V = 348.96 Den(Calc)= 7.57

Crystal System:

Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: Ama2

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

By Intensity(I/I_o): 2.93(1)(200), 3.29(0.6)(140), 1(0.5)(1.93),1.63(0.5)(1.42), 7.95(0.5)(020), 1.73(0.5)(122), 1.28(0.4)(342), 2.72(0.4)(131),

Physical Properties of Daomanite

Cleavage:

[100] Good, [001] Distinct, [010] Fair

Color:

Gray, Silver gray.

Density:

7.03

Diaphaniety:

Opaque

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Hardness:

3.5-4 - Copper Penny-Fluorite

Luster:

Metallic

Optical Properties of Daomanite

RL Anisotrophism:

Strong.

RL Color:

Light greenish yellow.

RL Pleochroism:

Gold-yellow to grayish green.

Calculated Properties of Daomanite

Electron Density:

r_electron=6.55 gm/cc
note: r_Daomanite=7.57 gm/cc.

Fermion Index

Fermion Index = 0.16701
Boson Index = 0.83299

Photoelectric:

PE_Daomanite= 757.40 barns/electron
U=PE_Daomanite x r_electron=4,959.58 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Daomanite is Not Radioactive

Daomanite Classification

Dana Class:

2.5.7.1 (2)Sulfides - Including Selenides and Tellurides

(2.5)where Am Bn Xp, with (m+n):p=3:2

(2.5.7)Dana Group

2.5.7.1 Daomanite * CuPtAsS2 Ama2 mm2

Strunz Class:

II/D.06-30 II - Sulfides and sulphosalts

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

II/D.06 - Kashinite series

II/D.06-10 Kashinite (Ir,Rh)2S3 P bcn 2/m 2/m 2/m

II/D.06-20 Bowieite (Rh,Ir,Pt)1.77S3 Pnca 2/m 2/m 2/m

II/D.06-30 Daomanite CuPtAsS2 Ama2 mm2

Other Daomanite Information

References:

NAME( Dana8) PHYS. PROP.(AmMin, Vol 87, p 1513) OPTIC PROP.(AntBidBlaNic1)

See Also:

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

Daomanite

CuPtAsS2
Dana No: 2.5.7.1 Strunz No: II/D.06-30
Locality:

Notes: