Chamosite Walker J R, Bish D L Clays and Clay Minerals 40 (1992) 319-322 Application of Rietveld refinement techniques to a disordered IIb Mg-chamosite Locality: Lebanon, New Hampshire, USA _database_code_amcsd 0012235 5.36982 9.3031 14.2610 90.315 97.234 90.022 C-1 atom x y z occ Uiso MgM1 0 0 0 .538 .002 FeM1 0 0 0 .462 .002 MgM2 .0141 .3348 .0027 .496 .002 FeM2 .0141 .3348 .0027 .504 .002 MgM3 .0032 .1683 .5004 .494 .002 FeM3 .0032 .1683 .5004 .506 .002 AlM4 0 .5 .5 .003 SiT1 .24 .170 .1941 .95 .001 AlT1 .24 .170 .1941 .05 .001 SiT2 .73 .998 .1945 .95 .001 AlT2 .73 .998 .1945 .05 .001 O1 .191 .1635 .0789 .011 O2 .705 .998 .0756 .011 O3 .231 .336 .2374 .011 O4 .528 .118 .2302 .011 OH5 .018 .061 .2306 .011 OH6 .689 .3312 .0742 .011 OH7 .144 .9990 .4300 .011 OH8 .143 .3361 .4286 .011 OH9 .643 .1627 .4311 .011