Gittinsite
Roelofsen-Ahl J N, Peterson R C
The Canadian Mineralogist 27 (1989) 703-708
Gittinsite: A modification of the thortveitite structure
_database_code_amcsd 0005233
6.852 8.659 4.686 90 101.69 90 C2
atom     x     y     z U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Zr       0 .3140    .5  .0103  .0099  .0096      0  .0015      0
Ca       0 .7063    .5  .0179  .0104   .027      0  -.014      0
Si   .2123 .9920 .9187  .0128  .0126  .0086   .002  -.001  -.001
O1       0 .9387     0   .013   .029   .027      0   .007      0
O2   .3734     0 .2196   .016   .016   .012   .001  -.008   .002
O3   .1885 .1549 .7405   .030   .012   .015   .001  -.006   .001
O4   .2640 .8539 .7103   .021   .016   .013  -.004   .005  -.009