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 after decompression
_database_code_amcsd 0004428
9.9907 9.9907 8.3695 90 90 120 P6_3
atom      x      y      z occ   Uiso
K         0      0 .00350 .54 .03448
NaK       0      0 .00350 .24 .03448
CaK       0      0 .00350 .03 .03448
Na   .55414 .99762 .50785     .02594
AlT1    2/3    1/3 .70209     .01355
SiT2    2/3    1/3 .31353     .01392
SiT3 .90606 .66644 .82291     .01334
AlT4 .90620 .66767 .19635     .01306
O1    .6708  .2957  .5008 1/3  .0348
O2   .97316 .68409 .00228     .03106
O3   .82600 .47725 .25143      .0360
O4   .83662 .48965 .76565      .0328
O5   .77305 .71396 .82379     .01929
O6   .77664 .73391 .20013      .0230