Stokesite
Vorma A
Mineralogical Magazine 33 (1963) 615-617
Crystal structure of stokesite, CaSnSi3O9*2H2O
_database_code_amcsd 0014440
14.465 11.625 5.235 90 90 90 Pnna
atom     x     y     z
Ca      .4   .25   .75
Sn       0     0    .5
Si1  .0648   .25   .75
Si2  .1415 .0317     0
O1   .1175 .0090 .2950
O2   .1315 .1668 .9190
O3   .4235 .0480 .8130
O4   .0010 .1720 .5705
Wat  .2870 .1770 .4780
O5     .25     0 .9520