Leucite
Dove M T, Cool T, Palmer D C, Putnis A, Salje E K H, Winkler B
American Mineralogist 78 (1993) 486-492
On the role of Al-Si ordering in the cubic-tetragonal phase transition of
leucite
Sample is Disordered
_database_code_amcsd 0001556
12.988 12.988 13.800 90 90 90 *I4_1/a
0 .25 .125
atom     x     y     z occ
K    .3660 .3631 .1073
Si1  .0563 .3971 .1671 2/3
Al1  .0563 .3971 .1671 1/3
Si2  .1668 .6115 .1269 2/3
Al2  .1668 .6115 .1269 1/3
Si3  .3929 .6407 .0848 2/3
Al3  .3929 .6407 .0848 1/3
O1   .1327 .3162 .1097
O2   .0881 .5135 .1329
O3   .1459 .6819 .2257
O4   .1325 .6857 .0359
O5   .2894 .5733 .1183
O6   .4839 .6161 .1659