Muscovite Tomita K, Shiraki K, Kawano M Clay Science 10 (1998) 423-441 Crystal structure of dehydroxylated 2M1 sericite and its relationship with mixed-layer mica/smectite Sample: unheated _database_code_amcsd 0012229 5.1909 9.0048 20.1170 90 95.773 90 C2/c atom x y z occ Biso K1 0 .104 .25 .727 3.35 NaK1 0 .104 .25 .170 3.35 CaK1 0 .104 .25 .010 3.35 AlM2 .249 .085 .0001 .933 .61 FeM2 .249 .085 .0001 .015 .61 MgM2 .249 .085 .0001 .011 .61 SiT1 .459 .929 .1348 .777 2.13 AlT1 .459 .929 .1348 .220 2.13 TiT1 .459 .929 .1348 .005 2.13 SiT2 .455 .259 .1348 .787 2.13 AlT2 .455 .259 .1348 .223 2.13 TiT2 .455 .259 .1348 .005 2.13 O1 .468 .946 .0554 1.83 O2 .385 .249 .0550 1.83 O3 .416 .098 .1674 1.83 O4 .255 .808 .1571 1.83 O5 .251 .369 .1694 1.83 OH6 .444 .568 .0484 1.83