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 = 1.967 GPa
_database_code_amcsd 0004424
9.8499 9.8499 8.2838 90 90 120 P6_3
atom      x      y      z occ  Uiso
K         0      0  .0029 .54 .0268
NaK       0      0  .0029 .24 .0268
CaK       0      0  .0029 .03 .0268
Na   .55578 .99782  .5066     .0217
AlT1    2/3    1/3  .7049     .0096
SiT2    2/3    1/3  .3107     .0113
SiT3 .91197 .66799 .82507     .0092
AlT4 .91316 .67064 .19626     .0114
O1    .6621  .2962  .5011 1/3 .0238
O2   .98771 .69126  .0055     .0205
O3    .8293 .47474  .2310     .0222
O4    .8432 .48988  .7551     .0244
O5   .77506 .71427  .8302     .0138
O6    .7815  .7375  .1941     .0212