Cristobalite
Lee S, Xu H
Acta Crystallographica B75 (2019) https://doi.org/10.1107/S2052520619000933
Using powder XRD and pair distribution function to determine anisotropic
atomic displacement parameters of orthorhombic tridymite and
tetragonal cristobalite
Locality: rhyolitic rock, New Mexico, USA
_database_code_amcsd 0020745
4.9727 4.9727 6.9257 90 90 90 P4_12_12
atom     x     y     z  Biso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Si   .3007 .3007     0 2.729  .0089  .0086  .0088  -.001   .002  -.002
O    .2390 .1041 .1787 1.476  .0289  .0094  .0178  -.002   .006   .001