Na.7K.3GaSiO4
Barbier J, Liu B, Weber J
European Journal of Mineralogy 5 (1993) 297-305
Crystal chemistry of the (Na,K)GaSiO4 system
Note: kalsilite structure
_database_code_amcsd 0006479
8.8169 8.8169 8.3873 90 90 120 P6_3
atom    x     y    z occ Biso
NaM1    0     0  .75  .3  2.7
KM1     0     0  .75  .7  2.7
NaM2  2/3   1/3 .791      4.7
NaM3  1/3   2/3 .728  .8  2.8
KM3   1/3   2/3 .728  .2  2.8
GaT1 .683  .657 .547 .95  2.9
SiT1 .683  .657 .547 .05  2.9
GaT2 .655 -.022 .434 .05  2.9
SiT2 .655 -.022 .434 .95  2.9
O1   .744  .878 .525      3.2
O2   .471  .918 .524      3.2
O3   .777  .190 .433      3.2
O4   .727  .636 .744      5.3