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American Mineralogist Crystal Structure Database

1 matching records for this search.

Arapovite
  
Uvarova Y A, Sokolova E V, Hawthorne F C, Agakhanov A A, Pautov L A
Download cm/vol42/CM42_1005.pdf 
The Canadian Mineralogist 42 (2004) 1005-1011
The crystal structure of arapovite, U4+(Ca,Na)2(K1-x_x)[Si8O20],x~0.5,
a new mineral species of the steacyite group from the Dara-i-Pioz moraine,
Tien-Shan Mountains, Tajikistan
Locality: Dara-i-Pioz moraine, Tien-Shan Mountains, Tajikistan
_database_code_amcsd 0005955
7.5505 7.5505 14.7104 90 90 90 P4/mcc
atom      x     y      z occ  Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
U4+A      0     0    .25 .59 .0097  .0071  .0071  .0149      0      0      0
ThA       0     0    .25 .26 .0097  .0071  .0071  .0149      0      0      0
CaA       0     0    .25 .10 .0097  .0071  .0071  .0149      0      0      0
DyA       0     0    .25 .02 .0097  .0071  .0071  .0149      0      0      0
SmA       0     0    .25 .01 .0097  .0071  .0071  .0149      0      0      0
PrA       0     0    .25 .01 .0097  .0071  .0071  .0149      0      0      0
CaB       0    .5    .25 .62 .0141  .0134  .0124  .0165      0      0      0
NaB       0    .5    .25 .34 .0141  .0134  .0124  .0165      0      0      0
NdB       0    .5    .25 .02 .0141  .0134  .0124  .0165      0      0      0
CeB       0    .5    .25 .01 .0141  .0134  .0124  .0165      0      0      0
BaB       0    .5    .25 .01 .0141  .0134  .0124  .0165      0      0      0
KC        0     0      0 .52 .0339  .0288  .0288  .0442      0      0      0
Si    .2594 .3354 .10846     .0107  .0093  .0097  .0132  .0001  .0008  .0001
O1   -.2362 .6845      0     .0229  .0263  .0295  .0129  .0000      0      0
O2    .4538 .2567  .1361     .0172  .0105  .0191  .0221  .0005  .0004  .0036
O3   -.1026 .2508  .3357     .0157  .0130  .0138  .0202 -.0001  .0037 -.0026


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