Keiviite-(Yb)
Yakubovich O V, Simonov M A, Voloshin A V, Pakhomovsky Y A
Soviet Physics Doklady 31 (1986) 930-932
Crystal structure of keivite Yb2[Si2O7]
Locality: Kola Peninsula, Russia
_database_code_amcsd 0015614
4.715 8.870 6.805 90 102.01 90 A2/m
atom     x      y     z occ Biso  B(1,1)  B(2,2)  B(3,3)  B(1,2)  B(1,3)  B(2,3)
Yb       0 .80653    .5 .71  .53 .007523 .001938 .003442       0 .001059       0
Lu       0 .80653    .5 .11  .53 .007523 .001938 .003442       0 .001059       0
Er       0 .80653    .5 .08  .53 .007523 .001938 .003442       0 .001059       0
Tm       0 .80653    .5 .04  .53 .007523 .001938 .003442       0 .001059       0
Y        0 .80653    .5 .03  .53 .007523 .001938 .003442       0 .001059       0
Dy       0 .80653    .5 .02  .53 .007523 .001938 .003442       0 .001059       0
Ho       0 .80653    .5 .01  .53 .007523 .001938 .003442       0 .001059       0
Si   .4127     .5 .7188      .76 .007875 .002320 .005079       0 .003095       0
O1      .5     .5    .5      1.5 .018807 .006673 .003386       0 .002443       0
O2    .716     .5  .881       .9 .011754 .002224 .006772       0 .003258       0
O3    .220  .6506  .735      1.1 .015281 .002542 .007900 .001833 .004887 .000423