| |
 |
Kostovite Mineral Data
|
|
|
General Kostovite Information
|
 Chemical Formula: |
CuAuTe4 |
| Composition: |
Molecular Weight = 770.91 gm |
| |
Copper 8.24 % Cu |
| |
Tellurium 66.21 % Te |
| |
Gold 25.55 % Au |
| |
______ |
| |
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  |
| |
Kostovite Image |
|
Images:
|
|
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 |
|
|
Images:
|
|
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 |
|
Kostovite Crystallography
|
| 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), |
| |
Physical Properties of Kostovite
|
| 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 |
| |
Optical Properties of Kostovite
|
| RL Anisotrophism: |
Distinct. |
| RL Color: |
Creamy white. |
| 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
Relative
Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
200% |
| R1 |
|
|
|
|
|
|
|
|
|
| R2 |
|
|
|
|
|
|
|
|
|
|
| |
Calculated Properties of Kostovite
|
| 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 |
| |
Kostovite Classification
|
| Dana Class: |
02.12.13.04 (02)Sulfides - Including Selenides and Tellurides |
| |
(02.12)where Am Bn Xp, with (m+n):p=1:2 |
| |
(02.12.13)Krennerite Group |
| |
02.12.13.01 Krennerite AuTe2 Pma2 mm2 |
| |
02.12.13.02 Calaverite AuTe2 C 2/m 2/m |
| |
02.12.13.03 Sylvanite (Au,Ag)2Te4 P 2/c 2/m |
| |
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 |
| |
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
|
| 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
Search for Kostovite using:
[AOL]
[Bing]
[Dog Pile]
[GeoScienceWorld]
[HotBot]
[Ixquick]
[Lycos]
[MAMMA]
[Scirus]
[Teoma]
[WebCrawler]
[Wikipedia]
[YAHOO]
Visit our Advertisers for Kostovite :
Ask about Kostovite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in
Español
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:
|
|
| |
| |
|
| |
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.