Publication details
Anomální výskyt metazeuneritu na hořícím uhelném odvalu v Bečkově u Trutnova (Česká republika)
| Title in English | An anomalous occurrence of metazeunerite at the burning coal mine dump at Bečkov near Trutnov (Czech Republic) |
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| Authors | |
| Year of publication | 2012 |
| Type | Article in Periodical |
| Magazine / Source | Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze |
| MU Faculty or unit | |
| Citation | |
| Field | Geology and mineralogy |
| Keywords | metazeunerite; burning coal mine dump; transport of uranium in hot gasses; Bečkov near Trutnov |
| Description | 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. Meta-zeunerite forms very light green irregular aggregates up to 1 mm composed by tiny (2 - 20 microns) 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) and V 876.6(3). Chemical analyses correspond to the empirical formula (Cu0.78Al0.21K0.12 Na0.05Pb0.05Zn0.03Ca0.01)1.25(UO2)2.00 [(AsO4)1.42(PO4)0.34(SO4)0.18(SiO4)0.06]2.00 . 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. |