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 = 7.2 GPa _database_code_amcsd 0008762 5.410 9.325 9.645 90 100.7 90 C2/m atom x y z occ Uiso Rb 0 .5 0 .99 .146 FeM1 0 0 .5 .015 FeM2 0 .334 .5 .012 FeT .068 .167 .211 .2675 .027 SiT .068 .167 .211 .74 .027 O1 .09 0 .17 .096 O2 .276 .271 .16 .076 O3 .129 .164 .39 .014 OH .131 .5 .372 .000