Rankinite
Kusachi I, Henmi C, Kawahara A, Henmi K
Mineralogical Journal 8 (1975) 38-47
The structure of rankinite
_database_code_amcsd 0014416
10.60 8.92 7.89 90 119.6 90 P2_1/a
atom     x     y     z Biso
Ca1  .0071 .0552 .2893 1.46
Ca2  .1677 .5745 .2083 1.42
Ca3  .3403 .9034 .2839 1.41
Si1  .2948 .2357 .4314  1.1
Si2  .0903 .2145 .9843  .95
O1   .3579 .4038 .4229  .89
O2   .1782 .2344 .5033 1.12
O3   .4105 .1016 .5523  .78
O4   .2007 .1629 .2120  .63
O5   .0970 .3857 .9810  .51
O6   .1451 .1487 .8437  .55
O7   .9299 .1536 .9394  .17