Phengite Mookherjee M, Redfern S A T, Zhang M European Journal of Mineralogy 13 (2001) 545-555 Thermal response of structure and hydroxyl ion of phengite-2M_1: an in situ neutron diffraction and FTIR study Sample: T = 20 C _database_code_amcsd 0006872 5.2173 9.0493 19.989 90 95.734 90 C2/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) K 0 .087 .25 .475 .022 Na 0 .087 .25 .025 .022 Al .242 .0834 .0009 .76 .005 Mg .242 .0834 .0009 .10 .005 Fe .242 .0934 .0009 .14 .005 SiT1 .462 .925 .1350 .81 .015 AlT1 .462 .925 .1350 .19 .015 SiT2 .452 .260 .1377 .81 .006 AlT2 .452 .260 .1377 .19 .006 O1 .457 .9398 .0513 .013 O2 .394 .2536 .0521 .011 O3 .454 .5620 .0520 .98 .012 F3 .454 .5620 .0520 .02 .012 O4 .429 .0955 .1688 .019 O5 .231 .8205 .1591 .028 O6 .248 .3644 .1693 .016 H1 .350 .656 .052 .98 .061 .047 .043 .048 .053 .035