Browsing by Subject "U4+ silicate"

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THE CRYSTAL STRUCTURE OF ARAPOVITE, U4+ (CA, NA)2 (K1-X↔X) [SI8 O20], X ≈ 0.5, A NEW MINERAL SPECIES OF THE STEACYITE GROUP FROM THE DARA-I-PIOZ MORAINE, TIEN-SHAN MOUNTAINS, TAJIKISTAN

Uvarova Y.A.; Sokolova E.; Hawthorne F.C.; Agakhanov A.A.; Pautov L.A. (2004)

The crystal structure of arapovite, ideally U4+ (Ca,Na)2 (K1– x □ x ) [Si8 O20], x ≈ 0.5, tetragonal, a 7.5505(4), c 14.7104(9) A, V 838.6(1) A3, space group P 4 /mcc , Z = 2, D calc. 3.365 g/cm3, was refined to an R 1 ...

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