Wadeite
Xu H, Navrotsky A, Balmer M L, Su Y
Physics and Chemistry of Minerals 32 (2005) 426-435
Crystal-chemical and energetic systematics of wadeite-type phases
A2BSi3O9 (A = K, Cs; B = Si, Ti, Zr)
_database_code_amcsd 0008975
6.9360 6.9360 10.1822 90 90 120 P6_3/m
atom     x     y     z  Uiso
KA     1/3   2/3 .0584 .0198
ZrB      0     0     0 .0070
Si   .3892 .2584   .25 .0058
O1   .4880 .0900   .25 .0112
O2   .2585 .2429 .1177 .0112