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Arapovite |
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Uvarova Y A, Sokolova E V, Hawthorne F C, Agakhanov A A, Pautov L A |
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The Canadian Mineralogist 42 (2004) 1005-1011 |
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The crystal structure of arapovite, U4+(Ca,Na)2(K1-x_x)[Si8O20],x~0.5, |
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a new mineral species of the steacyite group from the Dara-i-Pioz moraine, |
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Tien-Shan Mountains, Tajikistan |
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Locality: Dara-i-Pioz moraine, Tien-Shan Mountains, Tajikistan |
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_database_code_amcsd 0005955 |
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7.5505 7.5505 14.7104 90 90 90 P4/mcc |
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atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) |
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U4+A 0 0 .25 .59 .0097 .0071 .0071 .0149 0 0 0 |
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ThA 0 0 .25 .26 .0097 .0071 .0071 .0149 0 0 0 |
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CaA 0 0 .25 .10 .0097 .0071 .0071 .0149 0 0 0 |
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DyA 0 0 .25 .02 .0097 .0071 .0071 .0149 0 0 0 |
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SmA 0 0 .25 .01 .0097 .0071 .0071 .0149 0 0 0 |
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PrA 0 0 .25 .01 .0097 .0071 .0071 .0149 0 0 0 |
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CaB 0 .5 .25 .62 .0141 .0134 .0124 .0165 0 0 0 |
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NaB 0 .5 .25 .34 .0141 .0134 .0124 .0165 0 0 0 |
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NdB 0 .5 .25 .02 .0141 .0134 .0124 .0165 0 0 0 |
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CeB 0 .5 .25 .01 .0141 .0134 .0124 .0165 0 0 0 |
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BaB 0 .5 .25 .01 .0141 .0134 .0124 .0165 0 0 0 |
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KC 0 0 0 .52 .0339 .0288 .0288 .0442 0 0 0 |
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Si .2594 .3354 .10846 .0107 .0093 .0097 .0132 .0001 .0008 .0001 |
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O1 -.2362 .6845 0 .0229 .0263 .0295 .0129 .0000 0 0 |
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O2 .4538 .2567 .1361 .0172 .0105 .0191 .0221 .0005 .0004 .0036 |
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O3 -.1026 .2508 .3357 .0157 .0130 .0138 .0202 -.0001 .0037 -.0026 |
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View JMOL 3-D Structure (permalink) |
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