Coesite
Levien L, Prewitt C T
American Mineralogist 66 (1981) 324-333
High-pressure crystal structure and compressibility of coesite
P = 51.9 kbar
_database_code_amcsd 0000822
6.9897 12.233 7.1112 90 120.74 90 C2/c
atom     x     y     z  Biso
Si1  .1369 .1101 .0704  0.41
Si2  .5087 .1574 .5446  0.38
O1       0     0     0  0.94
O2      .5 .1085   .75  0.55
O3   .2540 .1298 .9282  0.62
O4   .3187 .1005 .3251  0.74
O5   .0275 .2126 .4714  0.80