Mineralogy Database

Kostovite Mineral Data

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General Kostovite Information

Help on Chemical  Formula: Chemical Formula: CuAuTe4
Help on Composition: Composition: Molecular Weight = 770.91 gm
   Copper      8.24 %  Cu
   Tellurium  66.21 %  Te
   Gold       25.55 %  Au
             100.00 % 
Help on Empirical Formula: Empirical Formula: CuAuTe4
Help on Environment: Environment: From gold and platinum-bearing replacement copper deposits.
Help on IMA Status: IMA Status: Approved IMA 1966
Help on Locality: Locality: Chelopech Deposit, Srednogorie zone, Sofia, Bulgaria. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Ivan Kostov (1912-), Bulgarian mineralogist.
Help on Name Pronunciation: Name Pronunciation: Kostovite + Pronunciation Say KOSTOVITE

Kostovite Image

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Comments: B&W, oil immersion, XPL image of a twinned grain of kostovite surrounded by native tellurium (Te), chalcopyrite (Cp), Tennantite (Tn) and barite (Ba). (AmMin, v51:29).
Location: Chelopech copper deposit, Bulgaria. Scale: Magnification 1,000 X.
© American Mineralogist

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Comments: Dark gray metallic fragment of kostovite embedded in epoxy.
Location: Chelopech Mine, Chelopech Obshchina, Balkan Mts (Stara-Planina Mts), Sofiya (Sofia) Oblast, Bulgaria. Scale: See Image.
© Rruff Database

Kostovite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.8665:1:0.5
Help on Cell Dimensions: Cell Dimensions: a = 16.5, b = 8.84, c = 4.42, Z = 4; V = 644.70 Den(Calc)= 7.94
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: Pma2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.03(1), 2.1(0.9), 2.93(0.6),

Physical Properties of Kostovite

Help on Cleavage: Cleavage: {???} Distinct
Help on Color: Color: Gray white.
Help on Density: Density: 8.43
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luster: Luster: Metallic

Optical Properties of Kostovite

Help on RL Anisotrophism: RL Anisotrophism: Distinct.
Help on RL Color: RL Color: Creamy white.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Kostovite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   38.70   54.00 
 420 nm   41.50   55.90 
 440 nm   44.00   57.70 
 460 nm   46.00   59.20 
 480 nm   47.50   60.30 
 500 nm   48.80   61.10 
 520 nm   49.70   61.60 
 540 nm   50.50   61.70 
 560 nm   51.20   61.60 
 580 nm   51.70   61.40 
 600 nm   52.10   61.20 
 620 nm   52.30   61.00 
 640 nm   52.50   60.80 
 660 nm   52.70   60.70 
 680 nm   52.90   60.70 
 700 nm   53.30   60.70 
Calculated Relative Intensity Colors of Kostovite in Air
   0%   30%   60%   90% 100% 120% 150% 180% 200%

Calculated Properties of Kostovite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.51 gm/cc
note: Specific Gravity of Kostovite =7.94 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEKostovite = 675.89 barns/electron
U=PEKostovite x rElectron Density=4,399.57 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kostovite is Not Radioactive

Kostovite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.12)where Am Bn Xp, with (m+n):p=1:2
  (02.12.13)Krennerite Group Krennerite AuTe2 Pma2 mm2 Calaverite AuTe2 C 2/m 2/m Sylvanite (Au,Ag)2Te4 P 2/c 2/m Kostovite CuAuTe4 Pma2 mm2
Help on  Strunz Class: Strunz Class: 02.EA.15 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.E - Metal Sulfides, M:S � 1:2
  02.EA -M:S = 1:2
02.EA.15 Krennerite AuTe2 Pma2 mm2
02.EA.15 Kostovite CuAuTe4 Pma2 mm2

Other Kostovite Information

Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Kostovite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 02.EA.15





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