Nanpingite
Ni Y, Hughes J M
American Mineralogist 81 (1996) 105-110
The crystal structure of nanpingite-2M2, the Cs end-member of muscovite
_database_code_amcsd 0001774
9.076 5.226 21.41 90 99.48 90 C2/c
atom     x     y     z occ Biso
Cs       0 .0961   .25 .88 1.83
K        0 .0961   .25 .06 1.83
Rb       0 .0961   .25 .01 1.83
Al2  .0837 .2503 .0000 .75  .91
Mg2  .0837 .2503 .0000 .10  .91
Fe2  .0837 .2503 .0000 .08  .91
Li2  .0837 .2503 .0000 .07  .91
Si1  .1197 .5884 .1272 .79 1.09
Al1  .1197 .5884 .1272 .21 1.09
Si2  .2901 .1009 .1271 .79 1.09
Al2  .2901 .1009 .1271 .21 1.09
O1   .0763 .5610 .0505      1.6
O2   .2672 .1320 .0504      1.5
O3   .2053 .3320 .1581      1.3
O4   .4670 .1210 .1591      1.5
O5   .2319 .8250 .1489      1.9
OH6  .9545 .0620 .0468 .90  1.5
F6   .9545 .0620 .0468 .10  1.5