Vermiculite Shirozu H, Bailey S W American Mineralogist 51 (1966) 1124-1143 Crystal structure of a two-layer Mg-vermiculite _database_code_amcsd 0000150 5.349 9.255 28.89 90 97.12 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) Mg1 0 .1638 .25 .96 Mg2 0 .4997 .25 .82 Mg3 0 .8332 .25 .86 Mg4 0 0 0 .41 2.30 Si1 .1042 .9997 .1545 .715 1.23 Al1 .1042 .9997 .1545 .285 1.23 Si2 .1026 .6647 .1547 .715 .83 Al2 .1026 .6647 .1547 .285 .83 O1 .1424 .0039 .2132 .83 O2 .1410 .6683 .2113 1.05 O3 .3579 .0697 .1338 2.09 O4 .3529 .5964 .1346 2.01 O5 .5593 .3316 .1339 1.94 OH .1420 .3380 .2129 1.21 Wat1 .3363 .9736 .0397 .62 .0601 .0242 .0006 -.0024 .0036 -.0036 Wat2 .3515 .3274 .0412 .62 .0768 .0226 .0007 -.0187 .0011 -.0037 Wat3 .3832 .6520 .0414 .62 .0686 .0276 .0006 -.0181 .0067 -.0034