Nepheline
Buerger M J, Klein G E, Donnay G
American Mineralogist 39 (1954) 805-818
Determination of the crystal structure of nepheline
_database_code_amcsd 0000067
10.01 10.01 8.405 90 90 120 P6_3
atom     x     y   z
K        0     0   0
Na   .0080 .4320   0
Si1    1/3   2/3 .82
Al1    1/3   2/3 .18
Si2  .0920 .3300 1/3
Al2  .0920 .3300 2/3
O1     1/3   2/3   0
O2   .0200 .3300  .5
O3   .1800    .5 .75
O4   .1700 .5300 .25
O5   .2300 .2800 .25
O6   .2300 .2800 .75