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Nagyágite

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Formula:
Pb
 
5
Au(Te,Sb)
 
4
S
 
5-8
System:MonoclinicColour:Black-grey
Lustre:MetallicHardness:1 - 1½
Name:
After the Hungarian name (Nagyág) of the type locality (Săcărâmb, Romania).
This page provides mineralogical data about Nagyágite.

Classification of Nagyágite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:2/D.15-20
Nickel-Strunz 10th (pending) edition ID:2.HB.20a

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
B : With Cu, Ag, Fe, Sn and Pb
Dana 8th edition ID:2.11.10.1

2 : SULFIDES
11 : AmBnXp, with (m+n):p = 2:3
Hey's CIM Ref.:5.3.1

5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
3 : Sulpharsenites etc. of Au
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Type Occurrence of Nagyágite

Type Locality:Sacarîmb (Sãcãrâmb; Szekerembe; Nagyág), Deva, Hunedoara Co., Romania
Year of Discovery:1845
Associated Minerals at type locality:
TetrahedriteTellurantimonySylvaniteStütziteSphalerite
RhodochrositeProustitePetziteKrenneriteGold
ColoradoiteArsenopyriteArsenicAltaite

Occurrences of Nagyágite

Geological Setting:In Au–Te-bearing epithermal hydrothermal veins.

Physical Properties of Nagyágite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Black-grey
Streak:Blackish lead-grey
Hardness (Mohs):1 - 1½
Hardness (Vickers):VHN100=60 - 94 kg/mm2
Tenacity:Flexible
Cleavage:Perfect
Perfect on {010}, excellent on {101}.
Density (measured):7.35 - 7.49 g/cm3
Density (calculated):7.29 g/cm3

Crystallography of Nagyágite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/m
Cell Parameters:a = 4.220(1) Å, b = 4.176(1) Å, c = 15.119(3) Å
β = 95.42(3)°
Ratio:a:b:c = 1.011 : 1 : 3.62
Unit Cell Volume:V 265.25 ų (Calculated from Unit Cell)
Z:2
Morphology:Thin {010} tabular crystals, commonly bent. Also granular.
Twinning:Multiple twinning on (001).
Comment:Pseudo-tetragonal/orthorhombic
Crystal Atlas:
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Nagyagite no.2 - Goldschmidt (1913-1926)
Nagyagite no.5 - Goldschmidt (1913-1926)

About Crystal Atlas

The mindat.org Crystal Atlas allows you to view a selection of crystal drawings of real and idealised crystal forms for this mineral and, in certain cases, 3d rotating crystal objects. The 3d models and HTML5 code are kindly provided by www.smorf.nl.

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Edge Lines | Miller Indicies | Axes

Transparency
Opaque | Translucent | Transparent

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Along a-axis | Along b-axis | Along c-axis | Start rotation | Stop rotation
X-Ray Powder Diffraction:
d-spacingIntensity
3.023 (100)
2.829 (80)
2.431 (40)
2.081 (50)
1.823 (30)
1.710 (30)
1.511 (40)
1.473 (30)
Comments:Săcărâmb (Nagyág), Romania (ICDD 00-047-1755).

Optical Data of Nagyágite

Type:Anisotropic
Anisotropism:Weak but distinct
Reflectivity:
400nmR1=46.4%R2= 48.4%
420nmR1=45.4%R2= 47.4%
440nmR1=44.5%R2= 46.7%
460nmR1=43.6%R2= 45.9%
480nmR1=42.9%R2= 45.1%
500nmR1=42.1%R2= 44.2%
520nmR1=41.3%R2= 43.3%
540nmR1=40.5%R2= 42.4%
560nmR1=39.8%R2= 41.6%
580nmR1=39.2%R2= 40.9%
600nmR1=38.7%R2= 40.3%
620nmR1=38.3%R2= 39.8%
640nmR1=37.8%R2= 39.2%
660nmR1=37.2%R2= 38.6%
680nmR1=36.6%R2= 37.8%
700nmR1=36.0%R2= 37.2%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 48.4%.
R1 shown in black, R2 shown in red
Colour in reflected light:Pale grey
Pleochroism:Weak

Chemical Properties of Nagyágite

Formula:
Pb
 
5
Au(Te,Sb)
 
4
S
 
5-8
Simplified for copy/paste:Pb5Au(Te,Sb)4S5-8
Essential elements:Au, Pb, S, Te
All elements listed in formula:Au, Pb, S, Sb, Te
Analytical Data:Average of 61 electron-microprobe analyses. Sample from Săcărâmb (Nagyág), Romania.
Pb (56.76)
Au (7.47)
Ag (0.10)
Fe (0.02)
Cu (0.02)
Sb (7.68)
Te (16.97)
S (10.83)
Total (99.85)
Empirical Formula:
(Te
 
0.78
Au
 
0.22
)Pb
 
1.00
(Pb
 
0.62
Sb
 
0.37
)S
 
2.00
Common Impurities:Ag,Fe,Bi

Relationship of Nagyágite to other Species

Common Associates:
TellurobismuthitePyriteGoldGalenaCalaverite
Altaite
Related Minerals - Nickel-Strunz Grouping):

- +
2.HB.05aAikinite
PbCuBiS
 
3
2.HB.05aFriedrichite
Pb
 
5
Cu
 
5
Bi
 
7
S
 
18
2.HB.05aGladite
PbCuBi
 
5
S
 
9
2.HB.05aHammarite
Pb
 
2
Cu
 
2
Bi
 
4
S
 
9
2.HB.05cJaskólskiite
Pb
 
2+x
Cu
 
x
(Sb,Bi)
 
2-x
S
 
6
(x = 0.2)
2.HB.05aKrupkaite
PbCuBi
 
3
S
 
6
2.HB.05aLindströmite
Pb
 
3
Cu
 
3
Bi
 
7
S
 
15
2.HB.05bMeneghinite
Pb
 
13
CuSb
 
7
S
 
24
2.HB.05aPekoite
PbCuBi
 
11
(S,Se)
 
18
2.HB.05aEmilite
Pb
 
2.7
Cu
 
2.7
Bi
 
5.3
S
 
12
2.HB.05UM2000-46-S:BiCuPb
Cu
 
0.33
Pb
 
0.33
Bi
 
7.67
S
 
12
2.HB.05aSalzburgite
Pb
 
1.6
Cu
 
1.6
Bi
 
6.4
S
 
12
2.HB.05UM1990-54-Se:BiCuPb
CuPb(Ni,Co)
 
0.3
Bi
 
3
Se
 
6
2.HB.05aPaarite
Pb
 
1.7
Cu
 
1.7
Bi
 
6.3
S
 
12
2.HB.10cEclarite
(Cu,Fe)Pb
 
9
Bi
 
12
S
 
28
2.HB.10bGiessenite
Pb
 
27
Cu
 
2
(Bi,Sb)
 
19
S
 
57
2.HB.10bIzoklakeite
Pb
 
27
(Cu,Fe,Ag)
 
2
(Sb,Bi)
 
19
S
 
57
2.HB.10aKobellite
Pb
 
22
Cu
 
4
(Bi,Sb)
 
30
S
 
69
2.HB.10aTintinaite
Pb
 
22
Cu
 
4
(Sb,Bi)
 
30
S
 
69
2.HB.15Benavidesite
Pb
 
4
(Mn,Fe)Sb
 
6
S
 
14
2.HB.15Jamesonite
Pb
 
4
FeSb
 
6
S
 
14
2.HB.20dBerryite
Cu
 
3
Ag
 
2
Pb
 
3
Bi
 
7
S
 
16
2.HB.20bBuckhornite
AuPb
 
2
BiTe
 
2
S
 
3
2.HB.20eWatkinsonite
Cu
 
2
PbBi
 
4
(Se,S,Te)
 
8
2.HB.20cMuseumite
[Pb
 
2
(Pb,Sb)
 
2
S
 
8
][(Te,Au)
 
2
]
2.HB.20eLitochlebite
Ag
 
2
PbBi
 
4
Se
 
8

Other Names for Nagyágite

Synonyms:
Black TelluriumElasmose (of Beudant)Foliated Tellurium
Other Languages:
French:Or gris lamelleux
German:Nagyagit
Blättererz
Blätteriges Golderz
Blättertellur
Nagiakererz
Russian:Нагиагит
Simplified Chinese:叶碲矿
叶碲金矿
Spanish:Nagyagita
Traditional Chinese:葉碲礦
葉碲金礦

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Nagyágite

Reference List:

- +
Klaproth, M.H. (1802): Chemische Untersuchung der siebenbürgischen Golderze, D. Blättererz, Beiträge zur chemischen Kenntniss der Mineralkörper, Dritter Band, Rottmann Berlin, 26-34

Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged, 834pp.: 168-169.

Stumpfel, E.F. (1970): New electron probe and optical data on gold tellurides. American Mineralogist, 55, 808–814.

Stanley, C.J., Roberts, A.C. and Harris, D.C. (1994): New data for nagyagite. Mineralogical Magazine, 58, 479–482.

American Mineralogist (1995): 80: 188.

Lupulescu, M. (1997): Nagyagite; new data and considerations. Rev. Roum. Géol., 41, 29–36.

Effenberger, H., Paar, W.H., Topa, D., Culetto, F.J. and Giester, G. (1999): Towards the crystal structure of nagyagite, [Pb(Pb, Sb)S2][(Au,Te)]. American Mineralogist, 84, 669-676.

Internet Links for Nagyágite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Nagyagite details from Handbook of Mineralogy (PDF)
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  • Localities for Nagyágite

    The 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.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Argentina
     
    • Catamarca
      • Belen Department
        • Farallón Negro
          • Agua de Dionisio mining district (YMAD)
    Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990; Milka K. de Brodtkorb (2002) Las Especies Minerales de la Republica Argentina. Vol. 1 (elements, sulphides and sulphosalts). (Asociacion Mineralogica Argentina); DE BRODTKORB, Milka K. Precious metaltellurides and other Te-bearing minerals in different paragenesis of Argentina: A review. Rev. Asoc. Geol. Argent. [online]. 2009, vol.64, n.3, pp. 365-372.
    Armenia
     
    • Gelark'unik' Province (Geghark'unik')
      • Vardenis
    Pavel M. Kartashov analytical data (2013)
    • Kotayk' Province
      • Hrazdan
    Extra Lapis English No. 5 Gold; Kovalenker, V. A., Zalibekyan, M. A., Laputina, I. P., Malov, V. S., Sandomirskaya, S. M., Garas' ko, M. I., & Mkhitaryan, D. I. (1990). Sulfide-telluride mineralization of the Megradzor ore field, Armenia. International Geology Review, 32(7), 705-720.
    Australia
     
    • Western Australia
    reflected light and SEM/EDS study
      • Laverton Shire
        • Mount Weld Station
    Sung, Y.-H., et al., "Tellurides from the Sunrise Dam gold deposit, Yilgarn Craton, Western Australia: a new occurrence of nagyagite", Mineralogy & Petrology 91, 249-270(2007)
    Austria
     
    • Salzburg
      • Lungau
        • Murwinkel
          • Schellgaden
            • Gold mines
    C. Auer: Lapis 20(11):11-20 (1995)
    Azerbaijan
     
    • Belokan-Avar ore district
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia
    Bulgaria
     
    • Sofiya Oblast (Sofia Oblast)
      • Chelopech
    American Mineralogist (1966): 51: 29-36; Econ.Geol.: 83; 395-404
    Canada
     
    • British Columbia
      • Revelstoke Mining Division
        • Gainer Creek
          • Ophir Lade Property
    Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990; R. P Rothwell (1898) The Mineral Industry, its statistics, technology and trade. Vol. 6 Scientific Publishing Co., New York
    • Northwest Territories
      • Mackenzie District
        • Yellowknife
    RIDLAND, G. C (1941): Mineralogy of the Negus and Con Mines, Yellowknife, Northwest
    RIDLAND, G. C (1941): Mineralogy of the Negus and Con Mines, Yellowknife, Northwest
    • Ontario
      • Thunder Bay District
        • Moss Township
    Dana 7:I:169.
    Chile
     
    • Atacama Region
      • Chañaral Province
        • Diego de Almagro
          • Potrerillos
    Maksaev, V., Townley, B., Palacios, C., and Camus, F. (2007): Metallic ore deposits. In: Moreno, T., and Gibbons, W. (editors): The Geology of Chile. The Geological Society (London), pp. 414.
    China
     
    • Xinjiang Autonomous Region
      • Yili Hasake Autonomous Prefecture (Ili Kazakh Autonomous Prefecture)
        • Aletai Prefecture (Altay Prefecture)
          • Habahe Co. (Kaba Co.; Qaba Co.)
    Huiliang Xiao, Yongguan Dong, Jiyuan Zhou, Henian Wang, Junfeng Ji, and Yu Zhao (2002): Mineral Deposits 21(suppl.), 715-718
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Central Bohemia Region
        • Jílové (Eule)
          • Jílové Gold mining District
            • Bohuliby
    Lapis 2000(4), 13-30
      • Liberec Region
        • Jablonec nad Nisou
          • Jílové u Držkova
    Small and microscopical minerals, Gold Shaft, Jílové, ČGO
    Ecuador
     
    • El Oro Province
      • Zaruma Canton
    I. Vikentyev, R. Banda, A. Tsepin, V. Prokofiev, O. Vikentyeva (2005) Mineralogy and formation conditions of Portovelo-Zaruma gold-sulphide vein deposit, Ecuador. IGCP Project 486, 2005 Field Workshop, Kiten, Bulgaria, 14-19 September 2005
    Egypt
     
    • Red Sea Governorate
      • Eastern Desert
        • Qift area (Kift area; Coptos area)
    Osman A. M., Pieczonka J., Piestrzyński A. 2002: Relationships between gold and tellurides in the El Sid gold deposit, Eastern Desert, Egypt. Mineralogia Polonica, vol. 33, no 2, 15-26
    Fiji
     
    • Viti Levu
    Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
        • Vatukoula
    D. W. Pals and P. G. Spry "Telluride mineralogy of the low-sulfidation" Mineralogy and Petrology (2003) 79: 285–307
    Guyana
     
    • Upper Takutu-Upper Essequibo Region
      • Omai
        • Omai gold mine
    Gabriel Voicu (1999) Geology, Geochemistry and Metallogeny of the Omai Gold Deposit, Guiana Shield, South America. PhD Thesis University of Quebec Chicoutimi.
    Japan
     
    • Honshu Island
      • Chubu Region
        • Shizuoka Prefecture
          • Shimoda City
            • Rendaiji
    (unpublished species lists maintained by local collectors; needs confirmation)
    Mexico
     
    • Chihuahua
      • Mun. de Moris
        • Sahuayacan
    Panczner (1987): 281 & 295.
    Panczner (1987): 281, 295.
    New Zealand
     
    • North Island
      • Waikato
        • Thames-Coromandel
          • Thames
    Dana 7:I:169.
    Norway
     
    • Hordaland
      • Bømlo
        • Lykling
    Hoel, T. (1989): Bomlø (Sic!)- ein altes Goldvorkommen in Norwegen-neu entdeckt. Emser Heft. 10 (4), 45-49
    Abildgaard, N. A. (2014): Om gullet på Bømlo..og min tid som gullgraver der. Stein. 41 (1), 4-13
    Romania
     
    • Alba Co.
    Mineralogical Record 13:389-400
    • Hunedoara Co.
      • Brad
    Econ.Geol.: 83; 395-404; Singer, D.A., Berger, V.I., and Moring, B.C. (2008): US Geological Survey Open-File Report 2008-1155.
      • Deva
    Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 755; Lapis (1989): 9: 8; American Mineralogist (1995): 80: 188.; Econ.Geol.: 83; 395-404; Marcoux, E., Grancea, L., Lupulescu, M., & Milési, J. (2002). Lead isotope signatures of epithermal and porphyry-type ore deposits from the Romanian Carpathian Mountains. Mineralium Deposita, 37(2), 173-184.; Cook, N. J., Ciobanu, C. L., Capraru, N., Damian, G., & Cristea, P. (2005). Mineral assemblages from the vein salband at Sacarimb, Golden Quadrilateral, Romania: II. Tellurides. Geokhimiia, Mineralogiia i Petrologiia, 43, 56-63.; Simon, G., Alderton, D. H. M., Stumpfl, E. F., & Bleser, T. (1995). Tellurantimony in Romania: first occurrences in Europe. Mineralogy and Petrology, 53(1-3), 115-124.
    Sweden
     
    • Värmland
      • Arvika
        • Glava
    Scherbina, A. S. (1941): The gold-rich chalcocite-bornite deposit of Glava in Vermland, Sweden, and its geological setting. Neues Jahrb. Mineral., Geol., Beilage-Band, 76A, 377-458.
    Switzerland
     
    • Wallis (Valais)
      • Simplon
    Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 193.
    UK
     
    • Wales
      • Gwynedd (Merionethshire)
        • Dolgellau Gold Belt
          • Bontddu
    BMS Database; R. E. Bevins (1988) Sixth Supplementary List of British Isles Minerals (Welsh). Mineralogical Magazine 52:121-124
    USA
     
    • Alaska
      • Matanuska-Susitna Borough
        • Willow Creek District
    USGS OFR 98-598(Hawley,1998)
    USGS OFR 98-598(Hawley,1998)
    U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report 2008-1225.
    U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report 2008-1225.
    • California
      • Calaveras Co.
        • Mother Lode Belt
          • Carson Hill District (Melones District)
            • Carson Hill
    Whitney, J.D. (1865), Geological survey of California, Geology, 1, Report of progress and synopsis of the field work from 1860 to 1864: 263; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 276.
      • Trinity Co.
        • Klamath Mts
          • Preachers Peak
    Hershey, Oscar H. (1899), The upper Coffee Creek mining district, California: Mining & Scientific Press: 79: 689; Osborne, H.Z. (1903), The Dorleska gold mine: Mining and Scientific Press: 7: 252; Stines, Norman S. (1907), The geology of the Coffee Creek mining district, California: Mining and Scientific Press: 95: 25-26; Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: 7th edition, revised and enlarged, 834pp.: 169.
    • Colorado
      • Boulder Co.
        • Gold Hill District
          • Gold Hill
    Minerals of Colorado (1997) Eckel, E. B.
    Minerals of Colorado (1997)
    Minerals of Colorado (1997)
    Minerals of Colorado (1997) E.B. Eckels
    Minerals of Colorado (1997) E.B. Eckels
    Minerals of Colorado (1997) Eckels, E. B.
        • Jamestown District
    Minerals of Colorado (1997)
    Minerals of Colorado (1997)
    Minerals of Colorado (1997)
    Minerals of Colorado (1997) E.B. Eckels
      • Clear Creek Co.
        • Georgetown District
    Minerals of Colorado (1997) Eckels, E. B.
        • Idaho Springs District
    Minerals of Colorado (1997)
      • Teller Co.
    Minerals of Colorado (1997)
    • Montana
      • Fergus Co.
        • Warm Springs District (Gilt Edge District; Gold Hill District; Maiden District)
          • Cone Butte Sub-District
    Econ Geol (1994) 89:602-627
      • Madison Co.
        • Alder Gulch District (Virginia City District; Fairweather District)
          • Summit
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; USGS Bull 574
        • Norwegian District (Whitehall District)
    Mineralogical Magazine 1996 60 : 871-876
    • Nevada
      • Mineral Co.
        • Borealis District
          • Borealis mine
    NBMG Spec. Pub. 31 Minerals of Nevada
    • New Hampshire
      • Rockingham Co.
        • Newington
          • Great Bay National Wildlife Refuge
    ora K. Foley, Robert A. Ayuso, Joseph D. Ayotte, Denise L. Montgomery, and Gilpin R. Robinson, Jr. (2006): Geological Assessment of Cores from the Great Bay National Wildlife Refuge, New Hampshire (USGS Scientific Investigations Report 2006-5203).
    • New Mexico
      • Sierra Co.
        • Chloride District
          • Chloride
    Minerals of New Mexico 3rd ed.
    Northrop, Minerals of New Mexico, 3rd Rev. Ed., 1996
    • North Carolina
      • Cleveland Co.
        • Kings Mountain District
    Dana 7:I:169.
    Genth, F.A.,1891,The Minerals Of North Carolina;USGS Bulletion No.74
    Genth,F.A and Kerr, W.C. 1881, Mineral and Mineral Localities of North Carolina , Geological Survey
      • Montgomery Co.
    John E.Callahan,James R.Craig,Todd N.Solberg,Telluride Mineralization of the Southeastern United States,Southeastern Geology,V.35,No.3,Sep,1995,pg.139-151
    • Virginia
      • Spotsylvania Co.
        • Gold-Pyrite Belt
    Henwood, W.J. (1871): Transactions of the Royal Geological Society of Cornwall 8(1), 371-384
    Uzbekistan
     
    • Tashkent Viloyati (Toshkent)
      • Angren Region
        • Chatkal-Kuraminskii Range
    Eleonora A. Dunin-Barkovskaya, Umid K. Aripov, L.A. Tsoy, M.A. Kim (2005) Mineralogical features and ore-forming conditions of goldbearing deposits of Uzbekistan. GEOCHMISTRY, MINERALOGY AND PETROLOGY 43 SOFIA pp 69-74
    Rustam Koneev, Evgeniy Ignatikov, Arpay Turesebekov, Umid Aripov, Rustam Khalmatov, Obidjon Kodirov, Miraziz Usmanov (2005) Gold ore deposits of Uzbekistan: Geochemistry and nanomineralogy of tellurium and selenium. IGCP Project 486, 2005 Field Workshop, Kiten, Bulgaria, 14-19 September 2005; GEOCHMISTRY, MINERALOGY AND PETROLOGY • 4 3 • SOFIA pp 69-74
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