Mica Comodi P, Drabek M, Montagnoli M, Rieder M, Weiss Z, Zanazzi P F Physics and Chemistry of Minerals 30 (2003) 198-205 Pressure-induced phase transition in synthetic trioctahedral Rb-mica Sample: P = 4.75 GPa _database_code_amcsd 0008761 5.420 9.383 9.846 90 100.8 90 C2/m atom x y z occ Uiso Rb 0 .5 0 .99 .153 FeM1 0 0 .5 .011 FeM2 0 .3327 .5 .011 FeT .076 .1663 .227 .2675 .022 SiT .076 .1663 .227 .74 .022 O1 .11 0 .18 .149 O2 .273 .263 .155 .064 O3 .144 .158 .417 .033 OH .127 .5 .366 .000