Muscovite Catti M, Ferraris G, Hull S, Pavese A European Journal of Mineralogy 6 (1994) 171-178 Powder neutron diffraction study of 2M_1 muscovite at room pressure and at 2 GPa Sample: P = 2 GPa _database_code_amcsd 0006534 5.187 8.995 19.502 90 95.78 90 C2/c atom x y z occ Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) K 0 .0949 1/4 .90 2.1 Na 0 .0949 1/4 .07 2.1 Al .2489 .0834 -.0010 .80 .61 Fe .2489 .0834 -.0010 .11 .61 Mg .2489 .0834 -.0010 .08 .61 Ti .2489 .0834 -.0010 .01 .61 Si1 .4636 .9267 .1375 .80 .8 Al1 .4636 .9267 .1375 .20 .8 Si2 .4544 .2586 .1365 .80 1.2 Al2 .4544 .2586 .1365 .20 1.2 O1 .4284 .0934 .1717 1.20 O2 .2453 .8154 .1642 1.34 O3 .2475 .3663 .1746 1.48 O4 .4638 .9419 .0537 .69 O5 .3906 .2505 .0535 .82 O6 .4648 .5693 .0501 1.48 H .374 .661 .065 4.2 .0042 .0035 .0006 .0000 .0018 .0002