Nepheline
Gatta G D, Angel R J
American Mineralogist 92 (2007) 1446-1455
Elastic behavior and pressure-induced structural evolution of nepheline:
Implications for the nature of the modulated superstructure
Locality: intrusive aplite of Snipe River, Tambani, Nyasaland, Malawi
Sample: P = 6.108 GPa
_database_code_amcsd 0004426
9.6189 9.6189 8.1423 90 90 120 P6_3
atom      x      y      z occ  Uiso
K         0      0 -.0073 .54 .0171
NaK       0      0 -.0073 .24 .0171
CaK       0      0 -.0073 .03 .0171
Na   .55850 .00022  .5027     .0169
AlT1    2/3    1/3 .70282     .0085
SiT2    2/3    1/3 .29904     .0089
SiT3 .92093 .67173 .81891     .0081
AlT4 .92279 .67442 .18671     .0073
O1      2/3    1/3  .4957     .0355
O2   .00916 .70138 -.0036     .0138
O3    .8360 .47420  .2237     .0172
O4    .8486 .48610  .7632     .0175
O5   .77757 .71312  .8327     .0107
O6    .7868  .7399  .1798     .0135