Tetra-auricupride Mineral Data

General Tetra-auricupride Information

Chemical Formula:

AuCu

Composition:

Molecular Weight = 260.51 gm

Copper 24.39 % Cu

Gold 75.61 % Au

______

100.00 %

Empirical Formula:

AuCu

Environment:

In mafic to ultrabasic serpentinites which contain platinum group metals.

IMA Status:

Approved IMA 1982

Locality:

Sardala, Xinjiang, China. Link to MinDat.org Location Data.

Name Origin:

Named after its crystal symmetry and Au, Cu content.

Synonym:

ICSD 42574

PDF 25-1220

Tetra-auricupride Image

Images:

Tetra-auricupride

Comments: Golden brown crystals of tetra-auricupride on matrix.
Location: Karabash (Karabasch), Chelyabinsk Oblast', Urals Region, Russia. Scale: Picture size 2 mm.
© Thomas Witzke / Abraxas-Verlag

Tetra-auricupride Crystallography

Axial Ratios:

a:c = 1:0.92676

Cell Dimensions:

a = 3.96, c = 3.67, Z = 2; V = 57.55 Den(Calc)= 15.03

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/mmm

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

By Intensity(I/I_o): 1.195(1), 2.24(1), 0.797(0.9),

Crystal Structure:

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Bayliss P , The Canadian Mineralogist , 28 (1990) p.751-755, Revised unit cell dimensions, space group,, and chemical formua of some metallic minerals

Physical Properties of Tetra-auricupride

Cleavage:

None

Color:

Golden yellow.

Density:

15.03

Diaphaneity:

Opaque

Fracture:

Malleable - Deforms rather than breaking apart with a hammer.

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Hardness:

4.5 - Between Fluorite and Apatite

Luminescence:

Non-fluorescent.

Luster:

Metallic

Streak:

yellow

Optical Properties of Tetra-auricupride

RL Anisotrophism:

Weak, with colors from gray to light gray.

RL Color:

Copper red with a yellow tint.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Tetra-auricupride in Air**
λ	R	∑ R(λ)
405 nm	44.60
436 nm	46.80
480 nm	50.30
526 nm	55.80
546 nm	61.20
578 nm	74.40
589 nm	76.60
622 nm	83.60
644 nm	84.90
656 nm	85.40
664 nm	86.60
700 nm	91.30

**Calculated Relative Intensity Colors of Tetra-auricupride in Air**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%	140%	160%	180%	190%
R

Calculated Properties of Tetra-auricupride

Electron Density:

Bulk Density (Electron Density)=12.5 gm/cc
note: Specific Gravity of Tetra-auricupride =15.0 gm/cc.

Fermion Index:

Fermion Index = 0
Boson Index = 1

Photoelectric:

PE_{Tetra-auricupride}=1,252.86 barns/electron
U=PE_{Tetra-auricupride} x rElectron Density=15612.99 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tetra-auricupride is Not Radioactive

Tetra-auricupride Classification

Dana Class:

01.01.02.02 (01)Native Elements

(01.01)with metallic elements other than the platinum group

(01.01.02)Auricupride Group

01.01.02.01 Auricupride Cu3Au P m3m 4/m 3 2/m

01.01.02.02 Tetra-auricupride AuCu P 4/mmm 4/m 2/m 2/m

01.01.02.03 Yuanjiangite AuSn P 6₃/mmc 6/m 2/m 2/m

Strunz Class:

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

01.A - Metals and Intermetallic Alloys

01.AA -Copper-cupalite family

01.AA.10b Tetra-auricupride AuCu P 4/mmm 4/m 2/m 2/m

Other Tetra-auricupride Information

References:

NAME( Dana8) PHYS. PROP.(List of New Min. Names,28-33th,1974-1984)

See Also:

Links to other databases for Tetra-auricupride :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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Print or Cut-and-Paste your Tetra-auricupride Specimen Label here :

Tetra-auricupride

AuCu
Dana No: 01.01.02.02 Strunz No: 01.AA.10b
Locality:

Notes: