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Zincospiroffite Mineral Data

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General Zincospiroffite Information

Help on Chemical  Formula: Chemical Formula: Zn2Te3O8
Help on Composition: Composition: Molecular Weight = 641.58 gm
   Zinc       20.38 %  Zn   25.37 % ZnO
   Tellurium  59.67 %  Te   74.63 % TeO2
   Oxygen     19.95 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Zn2Te3O8
Help on Environment: Environment: Secondary co-oxidation of calaverite. Related to spiroffite.
Help on IMA Status: IMA Status: Approved IMA 2004 (Dana # Added)
Help on Locality: Locality: Zhonshangou gold deposit in Chonli County, Hebei Province, China. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: The name reflects the similarity with the unit-cell parameters and composition to spiroffite
Help on Synonym: Synonym: IMA2002-047
 

Zincospiroffite Image

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  Zincospiroffite

Comments: Polished section showing zincospiroffite (x) intergrown with native gold (Ng) as the oxidation products of calaverite (Cv) + sphalerite (Sph) ┬▒ pyrite. (CanMin, v 42, p 765).
Location: Quartz ore of the Zhongshangou gold deposit, Chongli County, Hebei Province, China. Scale: Field of view 2 mm.
© Canadian Mineralogist

Zincospiroffite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.4699:1:2.2951
Help on Cell Dimensions: Cell Dimensions: a = 12.72, b = 5.15, c = 11.82, Z = 4; beta = 99.2° V = 764.34 Den(Calc)= 5.57
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.929(0.5)(113), 1.599(0.25)(425), 1.985(0.25)(223),2.155(0.25)(023,511), 3.24(0.25)(311), 4.758(0.25)(110), 2.82(0.25)(204),
 

Physical Properties of Zincospiroffite

Help on Color: Color: Gray.
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: dar green
 

Optical Properties of Zincospiroffite

Help on Optical Data: Optical Data: NCalc= 2.06 - from Gladstone-Dale relationship (KC = 0.1901) where Ncalc=Dcalc*KC+1
Help on RL Anisotrophism: RL Anisotrophism: Weak.
Help on RL Bireflectance: RL Bireflectance: Weak.
Help on RL Color: RL Color: Gray with no internal reflections.
Help on RL Pleochroism: RL Pleochroism: Weak.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Zincospiroffite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   22.30   29.70 
   
 420 nm   12.70   16.10 
 440 nm    6.90    8.60 
 460 nm    6.70    7.30 
 470 nm    7.00    7.50 
 480 nm    7.40    7.70 
 500 nm    7.60    7.90 
 520 nm    7.60    8.10 
 540 nm    7.40    7.80 
 546 nm    7.10    7.30 
 560 nm    6.90    6.90 
 580 nm    6.40    6.40 
 589 nm    6.10    6.20 
 600 nm    5.90    6.00 
 620 nm    5.40    5.60 
 640 nm    4.80    5.30 
 650 nm    4.40    5.00 
 660 nm    4.10    4.60 
 680 nm    3.60    4.20 
 700 nm    3.10    3.70 
Calculated Relative Intensity Colors of Zincospiroffite in Air
Relative
Intensity
   0% 100% 200% 300% 400% 500% 600% 700% 800% 900% 1000%
R1                      
R2                      
 

Calculated Properties of Zincospiroffite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.86 gm/cc
note: Specific Gravity of Zincospiroffite =5.57 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEZincospiroffite = 220.90 barns/electron
U=PEZincospiroffite x rElectron Density=1,073.94 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Zincospiroffite is Not Radioactive
 

Zincospiroffite Classification

Help on  Dana Class: Dana Class: 34.05.01.02 (34)Selenites - Tellurites - Sulfites
  (34.05)Dana Type
  (34.05.01)Spiroffite Series
 
34.05.01.01 Spiroffite (Mn,Zn)2Te3O8 C 2/c 2/m
 
34.05.01.02 Zincospiroffite! Zn2Te3O8 C 2/c 2/m
Help on  Strunz Class: Strunz Class: 04.JK.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.J - Arsenites, Antimonites, Bismuthites, Sulfites,
  04.JK -Tellurites without additional anions, without H2O
 
04.JK.10 Spiroffite (Mn,Zn)2Te3O8 C 2/c 2/m
 
04.JK.10 Zincospiroffite! Zn2Te3O8 C 2/c 2/m
 

Other Zincospiroffite Information

Help on References: References: NAME( CanMin, v 42, p 763) PHYS. PROP.(CanMin, v 42, p 763) OPTIC PROP.(CanMin, v 42, p 763)
Help on See Also: See Also: Links to other databases for Zincospiroffite :
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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Zincospiroffite

Zn2Te3O8
Dana No: 34.05.01.02 Strunz No: 04.JK.10
Locality:

 

Notes:

 

 
   
 


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