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Opornyi pegmatite, Zunshibir' valley, Ermakovskoe Be Deposit, Buriatia (Buryatia) Republic, Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia
1x1 cm grain of greenish metamict and high-hydrous barian betafite from granitic pegmatite near famous Ermakovskoe beryllium deposit. Empyrical formula of the mineral according to XRF data is (U.31Ba.19Ca.18Pb.04Th.03Y.02Sr.01Dy.01)0.79(Nb.96Ti.86Fe.11Ta.06W.01)2.00(O4.22(OH)2.78)7.00. Radioactivity of the specimen is 850 μR/h. Associating ... |
| © Pavel M. Kartashov | Photo ID: 143947 View Count: 185 |
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Opornyi pegmatite, Zunshibir' valley, Ermakovskoe Be Deposit, Buriatia (Buryatia) Republic, Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia
1.5x1 cm grain of greenish metamict and high-hydrous barian betafite from granitic pegmatite near famous Ermakovskoe beryllium deposit. Empyrical formula of the mineral according to XRF data is (U.31Ba.19Ca.18Pb.04Th.03Y.02Sr.01Dy.01)0.79(Nb.96Ti.86Fe.11Ta.06W.01)2.00O4.22(OH)2.78. Radioactivity of the specimen is 850 μR/h. Associating minerals ... |
| © Pavel M. Kartashov | Photo ID: 143946 View Count: 134 |
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Opornyi pegmatite, Zunshibir' valley, Ermakovskoe Be Deposit, Buriatia (Buryatia) Republic, Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia
3x2 cm grain of greenish metamict and high-hydrous unusually Ba- (up to 12.2 wt.% BaO)and Ti-rich betafite from granitic pegmatite near famous Ermakovskoe beryllium deposit. Empyrical formula of the mineral according to microprobe data is (U.42Ba.39Ca.21Sr.06)1.08(Ti1.20Nb.64Fe.12Ta.04)2.00(O6.18(OH).82)7.00. Radioactivity of the specimen is 510 ... |
| © Pavel M. Kartashov | Photo ID: 145762 View Count: 120 |
