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Kostovite Mineral Data
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General Kostovite Information
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Chemical Formula: |
CuAuTe4 |
Composition: |
Molecular Weight = 770.91 gm |
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Copper 8.24 % Cu |
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Tellurium 66.21 % Te |
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Gold 25.55 % Au |
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______ |
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100.00 % |
Empirical Formula: |
CuAuTe4 |
Environment: |
From gold and platinum-bearing replacement copper deposits. |
IMA Status: |
Approved IMA 1966 |
Locality: |
Chelopech Deposit, Srednogorie zone, Sofia, Bulgaria. Link to MinDat.org Location Data. |
Name Origin: |
Named for Ivan Kostov (1912-), Bulgarian mineralogist. |
Name Pronunciation: |
Kostovite + Pronunciation |
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Kostovite Image |
Images:
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Kostovite
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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Images:
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Kostovite
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 |
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Kostovite Crystallography
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Axial Ratios: |
a:b:c =1.8665:1:0.5 |
Cell Dimensions: |
a = 16.5, b = 8.84, c = 4.42, Z = 4; V = 644.70 Den(Calc)= 7.94 |
Crystal System: |
Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: Pma2 |
X Ray Diffraction: |
By Intensity(I/Io): 3.03(1), 2.1(0.9), 2.93(0.6), |
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Physical Properties of Kostovite
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Cleavage: |
{???} Distinct |
Color: |
Gray white. |
Density: |
8.43 |
Diaphaneity: |
Opaque |
Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. |
Habit: |
Microscopic Crystals - Crystals visible only with microscopes. |
Hardness: |
2-2.5 - Gypsum-Finger Nail |
Luster: |
Metallic |
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Optical Properties of Kostovite
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RL Anisotrophism: |
Distinct. |
RL Color: |
Creamy white. |
Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Kostovite in Air
λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
400 nm |
38.70 |
54.00 |
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420 nm |
41.50 |
55.90 |
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440 nm |
44.00 |
57.70 |
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460 nm |
46.00 |
59.20 |
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480 nm |
47.50 |
60.30 |
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500 nm |
48.80 |
61.10 |
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520 nm |
49.70 |
61.60 |
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540 nm |
50.50 |
61.70 |
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560 nm |
51.20 |
61.60 |
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580 nm |
51.70 |
61.40 |
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600 nm |
52.10 |
61.20 |
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620 nm |
52.30 |
61.00 |
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640 nm |
52.50 |
60.80 |
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660 nm |
52.70 |
60.70 |
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680 nm |
52.90 |
60.70 |
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700 nm |
53.30 |
60.70 |
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Calculated Relative Intensity Colors of Kostovite in Air
Relative Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
200% |
R1 |
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R2 |
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Calculated Properties of Kostovite
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Electron Density: |
Bulk Density (Electron Density)=6.51 gm/cc note: Specific Gravity of Kostovite =7.94 gm/cc. |
Fermion Index: |
Fermion Index = 0.05 Boson Index = 0.95 |
Photoelectric: |
PEKostovite = 675.89 barns/electron U=PEKostovite x rElectron Density=4,399.57 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Kostovite is Not Radioactive |
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Kostovite Classification
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Dana Class: |
02.12.13.04 (02)Sulfides - Including Selenides and Tellurides |
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(02.12)where Am Bn Xp, with (m+n):p=1:2 |
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(02.12.13)Krennerite Group |
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02.12.13.01 Krennerite AuTe2 Pma2 mm2 |
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02.12.13.02 Calaverite AuTe2 C 2/m 2/m |
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02.12.13.03 Sylvanite (Au,Ag)2Te4 P 2/c 2/m |
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02.12.13.04 Kostovite CuAuTe4 Pma2 mm2 |
Strunz Class: |
02.EA.15 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.E - Metal Sulfides, M:S � 1:2 |
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02.EA -M:S = 1:2 |
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02.EA.15 Krennerite AuTe2 Pma2 mm2 |
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02.EA.15 Kostovite CuAuTe4 Pma2 mm2 |
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Other Kostovite Information
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References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
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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Print or Cut-and-Paste your Kostovite Specimen Label here :
Kostovite
CuAuTe4
Dana No: 02.12.13.04 Strunz No: 02.EA.15
Locality:
Notes:
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