Polylithionite
Sartori F
Tschermaks Mineralogische und Petrographische Mitteilungen 24 (1977) 23-37
The crystal structure of a 2M_1 lepidolite
Note: This sample is about halfway along the trilithionite-polylithionite join
Locality: Biskupice, Moravia, Czech Republic
Note: Lepidolite series
_database_code_amcsd 0015663
5.209 9.053 20.185 90 99.125 90 C2/c
atom     x     y     z   occ Biso
K        0 .0906   .25  .775 1.18
Rb       0 .0906   .25   .06 1.18
Cs       0 .0906   .25   .02 1.18
Na       0 .0906   .25  .035 1.18
Ca       0 .0906   .25   .01 1.18
H3O      0 .0906   .25   .10 1.18
LiM2   .25   .75     0   .92  .98
AlM1 .2550 .0851 .0001  .585  .67
LiM1 .2550 .0851 .0001  .345  .67
MgM1 .2550 .0851 .0001  .033  .67
MnM1 .2550 .0851 .0001  .025  .67
FeM1 .2550 .0851 .0001  .012  .67
SiT1 .4614 .9244 .1340   .85  .23
AlT1 .4614 .9244 .1340   .15  .23
SiT2 .4558 .2554 .1341   .94  .24
AlT2 .4558 .2554 .1341   .06  .24
O1   .4417 .9281 .0524        .75
O2   .4153 .2517 .0529        .90
O3   .4396 .0898 .1658        .78
O4   .2353 .8217 .1629       1.06
O5   .2394 .3546 .1670       1.02
OH   .4435 .5701 .0498 .2425 1.31
F    .4435 .5701 .0498 .7575 1.31