Tongxinite Mineral Data

General Tongxinite Information

Chemical Formula:

Cu2Zn

Composition:

Molecular Weight = 192.48 gm

Zinc 33.97 % Zn

Copper 66.03 % Cu

______

100.00 %

Empirical Formula:

Cu₂Zn

Environment:

Silicified oxidized zone in Cu ore deposits.

IMA Status:

Not Submitted IMA

Locality:

Yulong ore district and Malasondo district, Tibet. Link to MinDat.org Location Data.

Name Origin:

Named for the composition (tong=copper, xin=zinc).

Tongxinite Image

Images:

Tongxinite

Comments: Tiny nugget with sorosite in a geletin capsule.
Location: Newjansk, Ural, Russia. Scale: Not given.
© Diederik Visser

Tongxinite Crystallography

Cell Dimensions:

a = 7.735, Z = 12; V = 462.79 Den(Calc)= 8.29

Crystal System:

Isometric Space Group: Unk

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

By Intensity(I/I_o): 2.1(1), 2.153(0.8), 1.815(0.7),1.849(0.7),

Physical Properties of Tongxinite

Color:

Golden yellow.

Diaphaneity:

Opaque

Habit:

Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Habit:

Tarnishes - Freshly fractured surfaces form a surface oxidation film

Luster:

Metallic

Optical Properties of Tongxinite

RL Color:

Gold colored, tarnishing blue.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Tongxinite in Air**
λ	R	∑ R(λ)
480 nm	41.12
500 nm	46.60
520 nm	49.02
540 nm	56.63
560 nm	58.00
580 nm	61.45
600 nm	65.10
620 nm	68.80
640 nm	73.53
660 nm	77.50

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

Calculated Properties of Tongxinite

Electron Density:

Bulk Density (Electron Density)=7.58 gm/cc
note: Specific Gravity of Tongxinite =8.29 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Tongxinite= 48.02 barns/electron
U=PE_Tongxinite x rElectron Density= 363.96 barns/cc.

Radioactivity:

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

Tongxinite Classification

Dana Class:

01.00.00.00 (01)Native Elements

(01.00)Without Dana Classification Numbers

(01.00.00)Alloys

01.00.00.00 Antitaenite* gamma-Fe3Ni Unk Cubic

01.00.00.00 Goldamalgam* (Au,Ag)Hg I m3m 4/m 3 2/m

01.00.00.00 IMA2007-036 TiFeSi2 Pbam 2/m 2/m 2/m

01.00.00.00 Rhenium* Re P 6₃/mmc 6/m 2/m 2/m

01.00.00.00 Tantalum* Ta I m3m 4/m 3 2/m

01.00.00.00 Titanium* Ti P 6₃/mmc 6/m 2/m 2/m

01.00.00.00 Tongxinite* Cu2Zn Unk Cubic

Strunz Class:

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

01.A - Metals and Intermetallic Alloys

01.AB -Zinc-brass family (Cu-Zn alloys)

01.AB.10b Danbaite CuZn2 Unk Cubic

01.AB.10b Tongxinite* Cu2Zn Unk Cubic

Other Tongxinite Information

References:

NAME( AmMin, V85, p264) PHYS. PROP.(AmMin, V85, p264) OPTIC PROP.(AmMin, V85, p264)

See Also:

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

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

Tongxinite

Cu2Zn
Dana No: 01.00.00.00 Strunz No: 01.AB.10b
Locality:

Notes:

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