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 = 600 C _database_code_amcsd 0006881 5.2356 9.0893 20.177 90 95.707 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 .093 .25 .475 .056 Na 0 .093 .25 .025 .056 Al .236 .0805 -.0009 .76 .021 Mg .236 .0805 -.0009 .10 .021 Fe .236 .0805 -.0009 .14 .021 SiT1 .455 .922 .1316 .81 .036 AlT1 .455 .922 .1316 .19 .036 SiT2 .450 .264 .1339 .81 .012 AlT2 .450 .264 .1339 .19 .012 O1 .459 .9447 .0534 .029 O2 .394 .2560 .0545 .019 O3 .459 .5608 .0505 .98 .029 F3 .459 .5608 .0505 .02 .029 O4 .446 .0969 .1687 .031 O5 .226 .8268 .1577 .034 O6 .241 .3548 .1710 .028 H1 .344 .641 .059 .98 .133 .044 .180 .060 .037 .002