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 = 1 bar _database_code_amcsd 0006533 5.2108 9.0399 20.021 90 95.76 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 .1687 1.20 O2 .2453 .8154 .1580 1.34 O3 .2475 .3663 .1695 1.48 O4 .4638 .9419 .0537 .69 O5 .3906 .2505 .0535 .82 O6 .4539 .5625 .0515 1.48 H .3642 .6525 .0559 4.2 .0042 .0035 .0006 .0000 .0018 .0002