Perrierite-(La)
Calvo C, Faggiani R
American Mineralogist 59 (1974) 1277-1285
A re-investigation of the crystal structures of chevkinite and perrierite
Locality: synthetic
_database_code_amcsd 0000435
13.818 5.677 11.787 90 113.85 90 P2_1/a
atom       x      y      z  occ  Uiso
La1   .23756  .0198 .26687      .0078
La2   .04897  .0265 .74320      .0087
Si1    .4123 -.0001  .7322      .0057
Si2    .1624  .0027  .5489      .0069
Mg         0     .5     .5      .0047
Ti1   -.0039  .2385  .0004 .616 .0105
Mg1   -.0039  .2385  .0004 .384 .0105
Ti2    .2749  .0071   .017 .884 .0068
Mg2    .2749  .0071   .017 .116 .0068
O1     .0794 -.2597  .1864      .0091
O11    .0652  .2556  .1858      .0103
O2     .2899  .2606  .1229      .0128
O21    .2875 -.2401  .1225      .0105
O3     .3736 -.2511  .4058      .0123
O31    .3920  .2862  .4066      .0139
O4     .0957  .0077  .9894      .0114
O5     .4067 -.0041  .0089      .0110
O6     .4932  .0328  .6667      .0150
O7     .2884 -.0337  .6366      .0176
O8     .1384 -.0036  .4042      .0115