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 Order model 2
_database_code_amcsd 0001558
13.005 13.005 13.765 90 90 90 *I4_1/a
0 .25 .125
atom     x     y     z occ
K    .3618 .3619 .1197
Si1  .0564 .3982 .1672  .5
Al1  .0564 .3982 .1672  .5
Si2  .1671 .6134 .1283 .75
Al2  .1671 .6134 .1283 .25
Si3  .3926 .6413 .0861 .75
Al3  .3926 .6413 .0861 .25
O1   .1352 .3168 .1117
O2   .0902 .5159 .1330
O3   .1471 .6816 .2284
O4   .1352 .6887 .0388
O5   .2898 .5758 .1209
O6   .4838 .6175 .1663