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 = 7.462 GPa
_database_code_amcsd 0004427
9.5587 9.5587 8.1051 90 90 120 P6_3
atom      x      y      z occ  Uiso
K         0      0  .0028 .54 .0220
NaK       0      0  .0028 .24 .0220
CaK       0      0  .0028 .03 .0220
Na   .56008 .00140  .5064     .0195
AlT1    2/3    1/3 .71012     .0108
SiT2    2/3    1/3 .30483     .0101
SiT3 .92358 .67276 .82528     .0100
AlT4 .92423 .67448 .19201     .0114
O1      2/3    1/3  .5018     .0299
O2   .01431 .70341  .0017     .0143
O3    .8408  .4758  .2446     .0202
O4    .8457  .4826  .7859     .0164
O5    .7801  .7144  .8417     .0077
O6    .7866  .7396  .1862     .0197