Na1.55K.45Si2O5
Rakic S, Kahlenberg V
European Journal of Mineralogy 13 (2001) 1215-1221
The crystal structure of a mixed alkali phyllosilicate with
composition Na1.55K0.45Si2O5
_database_code_amcsd 0006920
4.845 8.647 11.992 90 90.31 90 P2_1/c
atom     x     y      z occ  Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
NaM1 .7474 .8594 -.5369 .55 .0227   .019   .023   .026   .000  -.004  -.001
KM1  .7474 .8594 -.5369 .45 .0227   .019   .023   .026   .000  -.004  -.001
NaM2 .7531 .3991 -.4486     .0237   .015   .031   .025  -.003   .002  -.005
Si1  .8016 .3255 -.1748     .0163   .013   .019   .017  -.001   .001   .001
Si2  .2976 .4758 -.2840     .0147   .011   .017   .016   .001   .003   .001
O1   .2408 .4221 -.4089     .0313   .022   .046   .026   .008  -.003  -.002
O2   .7313 .3305 -.0461     .0230   .018   .026   .025  -.003   .006   .006
O3   .2381 .6595 -.2614     .0250   .024   .030   .021   .015   .000   .000
O4   .6251 .4503 -.2503     .0270   .028   .022   .031  -.004  -.001  -.003
O5   .1227 .3789 -.1895     .0263   .026   .031   .022  -.002  -.002  -.003