Phengite-2M1
Ivaldi G, Ferraris G, Curetti N, Compagnoni R
European Journal of Mineralogy 13 (2001) 1025-1034
Coexisting 3T and 2M_1 polytypes of phengite from Cima Pal (Val Savenca, western Alps):
Chemical and polytypic zoning and structural characterisation
Sample: 2M1Y
Locality: Cima Pal, Val Savenca, western Alps
_database_code_amcsd 0006914
5.2132 9.051 19.937 90 95.76 90 C2/c
atom      x      y      z  occ   Uiso
KI        0 .09634    1/4  .98  .0237
NaI       0 .09634    1/4  .02  .0237
AlM2 .24717 .08247 .00002 .775 .00824
MgM2 .24717 .08247 .00002  .12 .00824
FeM2 .24717 .08247 .00002 .105 .00824
TiM2 .24717 .08247 .00002  .01 .00824
SiT1 .46378 .92929 .13547 .845  .0071
AlT1 .46378 .92929 .13547 .155  .0071
SiT2 .45205 .25865 .13551 .845  .0073
AlT2 .45205 .25865 .13551 .155  .0073
O1    .4416  .0933 .16885       .0153
O2    .2363  .8251 .16046       .0169
O3    .2362  .3579 .16927       .0153
O4    .4576  .9393 .05396       .0123
O5    .3928 .25151 .05397       .0124
O6    .4559  .5641 .05222       .0154
H      .380   .635   .056        .039