Anomální výskyt metazeuneritu na hořícím uhelném odvalu v Bečkově u Trutnova (Česká republika)

Pages 177-182
Citation KOŤÁTKO, Luboš, ŠKODA, Radek, RUS, Petr, PAULIŠ, Petr a SEJKORA, Jiří. Anomální výskyt metazeuneritu na hořícím uhelném odvalu v Bečkově u Trutnova (Česká republika). Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze. Prague: National Museum, 2012, 20(2), 177-182. ISSN 1211-0329 (print), 1804-6495 (online). Also available from: https://publikace.nm.cz/en/periodicals/bmpholnrhmvp/20-2/anomalni-vyskyt-metazeuneritu-na-horicim-uhelnem-odvalu-v-beckove-u-trutnova-ceska-republika
Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze | 2012/20/2

A hydrated uranyl copper arsenate, mineral metazeunerite, was found in the material from burned coal mine dump at the abandoned uranium and coal deposit Bečkov near Trutnov, north-eastern Bohemia, Czech Republic. Metazeunerite forms very light green irregular aggregates up to 1 mm composed by tiny (2 - 20 μm) tabular crystals in association with white anglesite aggregates and white gypsum crystals at fragments of caustic metamorphosed rocks. Metazeunerite is tetragonal, space group P4/n, the unit-cell parameters refined from X-ray powder diffraction data are: a 7.090(1), c 17.439(3) Å and V 876.6(3) Å3. Chemical analyses correspond to the empirical formula (Cu0.78Al0.21K0.12 Na0.05Pb0.05Zn0.03Ca0.01)Σ1.25(UO2)2.00 [(AsO4)1.42(PO4)0.34(SO4)0.18(SiO4)0.06]Σ2.00 . 8H2O on the basis (As+P+S+Si) = 2 apfu. A possibility that metazeunerite formed from hot gases in conditions of burning coal mine dump is discussed in the paper.

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