Podrobnosti záznamu

Název
    Telluronevskite, Bi3TeSe2, a new mineral
Údaj o odpovědnosti
    Tomáš Řídkošil, Roman Skála, Zdeněk Johan, Vladimír Šrein
Autor
    Johan, Zdeněk, 1935-
    Řídkošil, Tomáš
    Skála, Roman
    Šrein, Vladimír
Jazyk
    anglicky
Zdrojový dokument - seriál
    European journal of mineralogy
Svazek/č.
    Vol. 13, no. 1
Strany
    p. 177-185
Rok
    2001
Poznámky
    3 obr., 7 tab., 2 s. bibl.
    il.
    Zkr. název ser.: Eur. J. Mineral.
Předmětová skupina
    bizmut
    chemismus minerálů
    hydrotermální alterace
    krystalová struktura
    kvarcit
    metasomatity
    mřížkové parametry
    neogén
    nový minerál
    telluridy
    tetradymit
    vulkanismus
    Západní Karpaty
Geografické jméno
    Slovensko
Klíčové slovo
    Bi3TeSe2
    Mineral
    New
    Telluronevskite
Abstrakt (anglicky)
   The new mineral telluronevskite, ideally Bi3TeSe2, has been found as irregular grains disseminated in quartzite from the volcanic Vihorlat Mts near Košice in eastern Slovakia, Slovak Republic. The mineral forms massive aggregates up to 2 mm in diameter and/or individual disseminated tabular crystals flattened along (0001). Telluronevskite is megascopically steel grey in colour, with a metallic lustre and black streak. In reflected light, it is white with a yellow tint, very weak pleochroism and moderate anisotrophy. Maximum and minimum values of reflectance measured in air for 470, 546, 589 and 650 nm are (R max/R min in) : 48.5/46.6; 51.1/48.5; 51.9/49.5; 52.8/50.5. Vickers micro-hardness (VHN 10 in kp.mm-ř) varied in the range 63-137 with mean value of 100. Microprobe analyses yield the empirical formula (Bi 2.92 Pb 0.02) Te 1.01 (Se 1.73 S 0.32). it is trigonal with space group P3m1.
   The unit-cell dimnesions refined from X-ray powder microdiffracton data are g.cm-3, measured density Dm = 8.1 (2) g.cm-3. The five stringest lines in the diffraction patern are (d (A), I/I0, hkl): 4.66, 19, 005; 3.12, 100, 104; 2.28, 33, 108; 2.13, 36, 110, 109; 1.355, 18, 1.016, 214. Constrained structure refinement from combined powder and precession data revealed ordering of te and Se atoms within the telluronevskite crystal structure. Telluronevskite belongs to the tsumoite subgroup of the tetradymite groupThe new mineral telluronevskite, ideally Bi3TeSe2, has been found as irregular grains disseminated in quartzite from the volcanic Vihorlat Mts near Košice in eastern Slovakia, Slovak Republic. The mineral forms massive aggregates up to 2 mm in diameter and/or individual disseminated tabular crystals flattened along (0001). Telluronevskite is megascopically steel grey in colour, with a metallic lustre and black streak.
   In reflected light, it is white with a yellow tint, very weak pleochroism and moderate anisotrophy. Maximum and minimum values of reflectance measured in air for 470, 546, 589 and 650 nm are (R max/R min in %) : 48.5/46.6; 51.1/48.5; 51.9/49.5; 52.8/50.5. Vickers micro-hardness (VHN 10 in kp.mm-ř) varied in the range 63-137 with mean value of 100. Microprobe analyses yield the empirical formula (Bi 2.92 Pb 0.02) Te 1.01 (Se 1.73 S 0.32). it is trigonal with space group P3m1. The unit-cell dimnesions refined from X-ray powder microdiffracton data are g.cm-3, measured
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
    U
Datum vložení
    12. 9. 2007
Datum importu
    8. 8. 2012