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Kostovite

A valid IMA mineral species
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About KostoviteHide

09968680014946276374984.jpg
Ivan Kostov Nikolov
Formula:
CuAuTe4
Colour:
Grayish white
Lustre:
Metallic
Hardness:
2 - 2½
Specific Gravity:
8.43
Crystal System:
Orthorhombic
Name:
Named by Georgy Terziev in 1966 in honor of Ivan Kostov Nikolov (Иван Костов Николов) (24 December 1913, Plovdiv, Bulgaria - 31 March 2004, Sofia, Bulgaria), geologist, mineralogist and crystallographer at Sofia University and earlier at London Imperial College. He was President of the International Mineralogical Association from 1982–1986.
This page provides mineralogical data about Kostovite.


Unique IdentifiersHide

Mindat ID:
2260
Long-form identifier:
mindat:1:1:2260:2
GUID
(UUID V4):
9b5a7ae4-7f6c-4709-b28b-40252aa790b6

IMA Classification of KostoviteHide

Classification of KostoviteHide

2.EA.15

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
E : Metal Sulfides, M: S <= 1:2
A : M:S = 1:2 - With Cu, Ag, Au
2.12.13.4

2 : SULFIDES
12 : AmBnXp, with (m+n):p = 1:2
3.3.3

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
3 : Sulphides etc. of Au

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
KtvIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of KostoviteHide

Metallic
Transparency:
Opaque
Colour:
Grayish white
Hardness:
2 - 2½ on Mohs scale
Hardness:
VHN25=180 - 186 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
Distinct/Good
Distinct in one direction
Density:
8.43 g/cm3 (Measured)    7.94 g/cm3 (Calculated)

Optical Data of KostoviteHide

Type:
Biaxial (+)
Anisotropism:
Distinct: pinkish grayish brown, yellowish gray, brownish gray and reddish hues.
Reflectivity:
WavelengthR1R2
400nm38.7%54.0%
420nm41.5%55.9%
440nm44.0%57.7%
460nm46.0%59.2%
480nm47.5%60.3%
500nm48.8%61.1%
520nm49.7%61.6%
540nm50.5%61.7%
560nm51.2%61.6%
580nm51.7%61.4%
600nm52.1%61.2%
620nm52.3%61.0%
640nm52.5%60.8%
660nm52.7%60.7%
680nm52.9%60.7%
700nm53.3%60.7%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 61.7%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Pinkish creamy white
Pleochroism:
Visible
Comments:
light creamy white (lighter)
to light creamy brownish (darker)

Chemistry of KostoviteHide

Mindat Formula:
CuAuTe4
Common Impurities:
Ag,Fe,Sb,S

Crystallography of KostoviteHide

Crystal System:
Orthorhombic
Cell Parameters:
a = 16.50(5) Å, b = 8.84(2) Å, c = 4.42(2) Å
Ratio:
a:b:c = 1.867 : 1 : 0.5
Unit Cell V:
644.70 ų (Calculated from Unit Cell)
Z:
4
Morphology:
20-50 micron equant to slightly elongated grains.
Twinning:
Fine lamellar 0.1 to 20 µm thick.
Comment:
Point Group: n.d. ; Space Group: n.d.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.03 Å(100)
2.10 Å(90)
2.93 Å(60)
5.03 Å(50)
3.36 Å(50)
3.24 Å(50)
2.23 Å(40)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
High-𝑇 alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])

Type Occurrence of KostoviteHide

General Appearance of Type Material:
Small grains and short veinlets in tennantite and chalcopyrite. Equant to slightly elongated grains, 20 to 50 µm in diameter. Outlines in polished sections are usually polygonal, seldom rounded.
Place of Conservation of Type Material:
Geological Institute, Bulgarian Academy of Sciences, Bulgaria.
University of Sophia, Bulgaria.
Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry (IGEM), Moscow, Russia.
A.E. Fersman Mineralogical Museum of the Academy of Sciences, Moscow, Russia.
Geological Setting of Type Material:
Replacement copper deposit
Associated Minerals at Type Locality:
Reference:
Terziev, G. (1966) Kostovite, a gold-copper telluride from Bulgaria. American Mineralogist: 51: 29-36.

Synonyms of KostoviteHide

Other Language Names for KostoviteHide

German:Kostovit
Simplified Chinese:针碲金铜矿
Spanish:Kostovita

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Kostovite associated with GoldAu
1 photo of Kostovite associated with WeissiteCu2-xTe
1 photo of Kostovite associated with PyriteFeS2

Related Minerals - Strunz-mindat GroupingHide

2.EA.RadvaniceiteGeS2Mon. m : Pb
2.EA.05SylvaniteAgAuTe4Mon. 2/m : P2/b
2.EA.10CalaveriteAuTe2Mon.
2.EA.15KrenneriteAu3AgTe8Orth. mm2 : Pma2
2.EA.20BerndtiteSnS2Trig. 3m (3 2/m) : P3m1
2.EA.20KitkaiteNiTeSeTrig. 3m (3 2/m) : P3m1
2.EA.20MeloniteNiTe2Trig. 3m (3 2/m) : P3m1
2.EA.20MerenskyitePdTe2Trig. 3m : P3m1
2.EA.20MoncheitePt(Te,Bi)2Trig. 3m (3 2/m) : P3m1
2.EA.20ShuangfengiteIrTe2Trig. 3m : P3m1
2.EA.20SudovikovitePtSe2Trig. 3m (3 2/m) : P3m1
2.EA.20OgnititeNiBiTeTrig. 3m : P3m1
2.EA.25VerbeekitePdSe2Mon.
2.EA.30DrysdalliteMoSe2Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
2.EA.30JordisiteMoS2Amor.
2.EA.30MolybdeniteMoS2Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
2.EA.30TungsteniteWS2Trig. 3m : R3m
2.EA.40PampaloiteAuSbTeMon. 2/m : B2/b

Other InformationHide

Magnetism:
Non-Magnetic
Notes:
Tests with HNO3 (1:1), HCl (1:1), KCN, KOH, HgCl2, and FeCl3 are negative.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for KostoviteHide

References for KostoviteHide

Localities for KostoviteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Australia
 
  • Western Australia
Frank Keutsch (reflected light and SEM/EDS study)
      • Kalgoorlie-Boulder
Noble (2017)
Noble (2017)
Bulgaria (TL)
 
  • Sofia Province
    • Chelopech Municipality
Geol. Ore deposit (1966) +3 other references
China
 
  • Shandong
    • Linyi
      • Pingyi County
        • Tongshi complex
Anthony +1 other reference
Fiji
 
  • Vanua Levu
    • Wailevu
      • Yanawai Goldfield
Naden +1 other reference
Finland
 
  • Pirkanmaa
    • Orivesi
Economic Geology (1996)
Ghana
 
  • Ashanti Region
    • Obuasi Gold Project
Mineralogical Magazine 1990 54 : 617-627 +1 other reference
Greece
 
  • Eastern Macedonia and Thrace
    • Evros
      • Alexandroupoli
P. Voudouris et al. (2022)
  • South Aegean
    • Tinos
      • Tinos Island
Bonev +5 other references
Japan
 
  • Shizuoka Prefecture
    • Shimoda City
      • Rendaiji
Int Geol Congr (2008)
Nakata et al. (2011)
Mexico
 
  • Mexico
Larocque et al. (2008)
  • Sonora
    • Moctezuma Municipality
Lapis 2001 (1)
Bonev et al. (2005)
Papua New Guinea
 
  • Eastern Highlands Province
    • Kainantu
ESPI et al. (22–25 October 2006) +2 other references
Peru
 
  • Pasco
    • Pasco province
      • Tinyahuarco district
Bendezu et al. (2009)
Bendezu et al. (2009)
Romania
 
  • Hunedoara County
    • Certeju de Sus
      • Bocşa Mare
Bonev +3 other references
Russia
 
  • Chelyabinsk Oblast
    • Sosnovsky District
      • Bereznyakovskoe ore field
Lehmann et al. (1999) +1 other reference
  • Kamchatka Krai
    • Bystrinsky District
      • Central Kamchatka mining district
Bonev et al. (2005)
  • Murmansk Oblast
    • Olenegorsk
Bazai et al. (2009)
  • Sverdlovsk Oblast
    • Beryozovsky
Lehmann et al. (1999)
Sweden
 
  • Värmland County
    • Arvika
      • Glava
Bonev +3 other references
USA
 
  • Arizona
    • Cochise County
Graeme (1993)
Graeme (1993) +2 other references
  • Colorado
    • Gunnison County
      • Vulcan Mining District (Cebolla Mining District; Domingo Mining District)
        • Vulcan
Frank Keutsch collection
    • Lake County
      • Alicante
POHL et al. (1990)
Eckel et al. (1997)
Uzbekistan
 
  • Tashkent Region
    • Ohangaron District
Eleonora A. Dunin-Barkovskaya et al. (2005)
GEOCHMISTRY +3 other references
Zimbabwe
 
  • Midlands
    • Kwekwe District
Afifi et al. (1988) +1 other reference
 
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