Phengite Pavese A, Ferraris G, Pischedda V, Ibberson R European Journal of Mineralogy 11 (1999) 309-320 Tetrahedral order in phengite 2M_1 upon heating, from powder neutron diffraction, and thermodynamic consequences Sample: T = 293 K Note: O5 z-coordinate altered. _database_code_amcsd 0006768 5.21397 9.0521 19.9968 90 95.736 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 .0932 1/4 .94 .022 Na 0 .0932 1/4 .03 .022 AlM2 .2471 .0827 .0007 .835 .0252 MgM2 .2471 .0827 .0007 .02 .0252 FeM2 .2471 .0827 .0007 .17 .0252 SiT1 .4649 .9299 .1351 .79 .018 AlT1 .4649 .9299 .1351 .21 .018 SiT2 .4543 .2581 .1366 .83 .015 AlT2 .4543 .2581 .1366 .17 .015 O1 .4310 .0931 .1680 .0257 O2 .2415 .8180 .1599 .0358 O3 .2406 .3623 .1692 .031 O4 .4578 .9426 .0530 .026 O5 .3917 .2519 .0540 .0169 O6 .4604 .5645 .0511 .94 .026 F6 .4604 .5645 .0511 .06 .026 H .360 .652 .0569 .94 .079 .056 .083 .012 -.008 .000