Mineralogy Database

Tongxinite Mineral Data

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General Tongxinite Information

Help on Chemical  Formula: Chemical Formula: Cu2Zn
Help on Composition: Composition: Molecular Weight = 192.48 gm
   Zinc    33.97 %  Zn
   Copper  66.03 %  Cu
          100.00 % 
Help on Empirical Formula: Empirical Formula: Cu2Zn
Help on Environment: Environment: Silicified oxidized zone in Cu ore deposits.
Help on IMA Status: IMA Status: Not Submitted IMA
Help on Locality: Locality: Yulong ore district and Malasondo district, Tibet. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition (tong=copper, xin=zinc).

Tongxinite Image

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

Tongxinite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 7.735, Z = 12; V = 462.79 Den(Calc)= 8.29
Help on Crystal System: Crystal System: Isometric Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.1(1), 2.153(0.8), 1.815(0.7),1.849(0.7),

Physical Properties of Tongxinite

Help on Color: Color: Golden yellow.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Habit: Habit: Tarnishes - Freshly fractured surfaces form a surface oxidation film
Help on Luster: Luster: Metallic

Optical Properties of Tongxinite

Help on RL Color: RL Color: Gold colored, tarnishing blue.
Help on Reflectivity 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
   0%   30%   60%   90% 100% 120% 150% 180% 210%

Calculated Properties of Tongxinite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=7.58 gm/cc
note: Specific Gravity of Tongxinite =8.29 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PETongxinite = 48.02 barns/electron
U=PETongxinite x rElectron Density= 363.96 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tongxinite is Not Radioactive

Tongxinite Classification

Help on  Dana Class: Dana Class: (01)Native Elements
  (01.00)Without Dana Classification Numbers
  (01.00.00)Alloys Antitaenite* gamma-Fe3Ni Unk Cubic Goldamalgam* (Au,Ag)Hg I m3m 4/m 3 2/m IMA2007-036 TiFeSi2 Pbam 2/m 2/m 2/m Rhenium* Re P 63/mmc 6/m 2/m 2/m Tantalum* Ta I m3m 4/m 3 2/m Titanium* Ti P 63/mmc 6/m 2/m 2/m Tongxinite* Cu2Zn Unk Cubic
Help on  Strunz Class: 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

Help on References: References: NAME( AmMin, V85, p264) PHYS. PROP.(AmMin, V85, p264) OPTIC PROP.(AmMin, V85, p264)
Help on See Also: 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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Dana No: Strunz No: 01.AB.10b





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