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 = .0001 GPa, in air
_database_code_amcsd 0004422
9.9995 9.9995 8.3766 90 90 120 P6_3
atom      x      y      z occ   Uiso
K         0      0 .00410 .54 .03296
NaK       0      0 .00410 .24 .03296
CaK       0      0 .00410 .03 .03296
Na   .55412 .99724 .50845     .02537
AlT1    2/3    1/3 .70194     .01271
SiT2    2/3    1/3 .31362     .01423
SiT3 .90568 .66614 .82276     .01378
AlT4 .90645 .66759 .19630     .01235
O1    .6619  .2891 .50178 1/3  .0335
O2   .97288 .68347 .00309     .03350
O3   .82649 .47750 .25170     .03807
O4   .83665 .48973 .76444     .03390
O5   .77365 .71475 .82462     .02064
O6   .77607 .73287 .20149     .02315