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 = 650 C _database_code_amcsd 0006882 5.2412 9.0983 20.242 90 95.690 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 .090 .25 .475 .063 Na 0 .090 .25 .025 .063 Al .235 .0807 -.0009 .76 .022 Mg .235 .0807 -.0009 .10 .022 Fe .235 .0807 -.0009 .14 .022 SiT1 .455 .921 .1320 .81 .036 AlT1 .455 .921 .1320 .19 .036 SiT2 .451 .265 .1335 .81 .014 AlT2 .451 .265 .1335 .19 .014 O1 .460 .9443 .0531 .032 O2 .394 .2571 .0540 .020 O3 .459 .5610 .0499 .98 .031 F3 .459 .5610 .0499 .02 .031 O4 .450 .0979 .1687 .037 O5 .224 .8282 .1578 .037 O6 .239 .3537 .1700 .033 H1 .341 .642 .057 .98 .177 .037 .220 .069 .103 .019