Moskvinite-(Y)
Sokolova E V, Hawthorne F C, Agakhanov A A, Pautov L A
The Canadian Mineralogist 41 (2003) 513-520
The crystal structure of moskvinite-(Y), Na2K(Y,REE)[Si6O15], a new silicate
mineral with [Si6O15] three-membered double-rings from the Dara-I-Pioz Moraine,
Tien-Shan mountains, Tajikistan
Locality: Dara-I-Pioz Moraine, Tien-Shan mountains, Tajikistan
_database_code_amcsd 0005835
10.623 14.970 8.553 90 90 90 Ibmm
atom       x      y       z occ   Uiso U(1,1) U(2,2) U(3,3)  U(1,2) U(1,3) U(2,3)
Na       1/2 .25636       0      .0178  .0168  .0167  .0197       0  .0051      0
K     .43056      0     1/4      .0254  .0234  .0373  .0154       0      0      0
Y        1/4    1/4     1/4 .77 .00679 .00714 .00699 .00624 -.00077      0      0
Dy       1/4    1/4     1/4 .09 .00679 .00714 .00699 .00624 -.00077      0      0
Gd       1/4    1/4     1/4 .04 .00679 .00714 .00699 .00624 -.00077      0      0
Er       1/4    1/4     1/4 .04 .00679 .00714 .00699 .00624 -.00077      0      0
Ho       1/4    1/4     1/4 .02 .00679 .00714 .00699 .00624 -.00077      0      0
Sm       1/4    1/4     1/4 .02 .00679 .00714 .00699 .00624 -.00077      0      0
Nd       1/4    1/4     1/4 .01 .00679 .00714 .00699 .00624 -.00077      0      0
Tb       1/4    1/4     1/4 .01 .00679 .00714 .00699 .00624 -.00077      0      0
Si1   .53384 .40003     1/4     .00943  .0083  .0093  .0108  -.0013      0      0
Si2   .22002 .39603 -.07776     .00934  .0100  .0091  .0089  .00008 .00047 .00111
O1    .15917 .37118    -1/4      .0138  .0116  .0192  .0107  -.0025      0      0
O2    .43311 .32256     1/4      .0129  .0109  .0123  .0154  -.0038      0      0
O3    .37260 .38915 -.09771      .0129  .0101  .0173  .0114   .0000  .0003  .0011
O4    .18101    1/2  -.0448      .0155  .0170  .0086  .0211       0  .0034      0
O5    .16655 .33667  .05854      .0136  .0139  .0143  .0127  -.0012 -.0010  .0050
O6     .4751    1/2     1/4      .0140  .0139  .0097  .0184       0      0      0