New data on typomorphism of tetradymite Bi2Te2S from typolocality Župkov, Slovak Republic
UDC 549.313.6 (437.6)
https://doi.org/10.15407/mineraljournal.37.01.003
O. Ponomarenko (1), L. Skakun (2), S. Jeleň (3), T. Mikuš (3), I. Kvasnytsya (4), T. Bálintová-Števková (5), S. Bondarenko (1), O. Grinchenko (4)
(1) M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of NAS of Ukraine
34, Acad. Palladina Pr., Kyiv-142, Ukraine, 03680 Е-mail: pan@igmof.gov.ua; sbond@igmof.gov.ua
(2) Ivan Franko Lviv National University
4, Hryshevsky Str., Lviv, Ukraine, 79005 Е-mail: lzskakun@gmail.com
(3) Geological Institute, Slovak Academy of Sciences
1, Ďumbierska, Banská Bystrica, Slovakia, 97401 E-mail: jelen@savbb.sk; mikus@savbb.sk
(4) Taras Shevchenko Kyiv National University
90, Vasylkivska Str., Kyiv, Ukraine, 03022 Е-mail: alexgrin@univ.kiev.ua; ikvasnytsya@gmail.com
(5) Comenius University, Bratislava
Mlynská dolina G, Bratislava, Slovakia, 84215 Е-mail: timea.balintova@gmail.com
New data on typomorphism of tetradymite Bi2Te2S from typolocality Župkov, Slovak Republic
Language: English
Mineralogical journal 2015, 37 (1): 3-11
Abstract: Complex investigations of tetradymite Bi2Te2S from Župkov area (Slovak Republic) found as museum sample in Lviv National University is carried out by methods of electronic microscopy, local microprobe analysis and X-ray diffraction. It is established, that tetradymite occur as almost perfectly shaped crystals of rhombohedral and pinacoidal habits or as crystals with habit transitive between them. The main simple forms of crystals established are {0001}, {1011} and {0112}. Tetra dymite crystals are commonly look like cutted trigonal pseudo-pyramids, lamellar crystals as well twinned formation of tetrade-crystals. Chemical composition of the mineral has established based on data of statistical distribution of atoms into crystallochemical positions and tetradymite formula is established to be similar to Bi1.86Sb0.14Te2S0.94Se0.06. Crystalline structure of the mineral is specified by using Rietveld method. The historical importance of the studied samples is also considered. Some data on tellurides of tetradymite group obtained earlier at their studying in the frame of joint international project "Comparative mineralogo-geochemical analysis Аu-Ag-Bi-Te-Se of mineralization in neovolcanites of Ukraine and Slovakia (region Carpathians)" carried out 2008—2010 years are also used.
Keywords: tetradymite, bismuth telluride, crystal morphology, crystal structure, Župkov area, Slovakia.
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