Phase-F Kudoh Y, Nagase T, Sasaki S, Tanaka M, Kanzaki M Physics and Chemistry of Minerals 22 (1995) 295-299 Phase F, a new hydrous magnesium silicate synthesized at 1000 C and 17 GPa: Crystal structure and estimated bulk modulus Note: The authors withdrew this structure, it is not Phase-F See PCM 24 (1997) 610 _database_code_amcsd 0007918 5.073 5.073 14.013 90 90 120 P6_3cm atom x y z occ Biso MgM1 .634 0 .321 .29 1.8 SiM1 .634 0 .321 .29 1.8 MgM2 .688 0 .176 .16 4.0 SiM2 .688 0 .176 .16 4.0 MgM3 0 0 -.026 .09 2.4 SiM3 0 0 -.026 .09 2.4 MgM4 1/3 2/3 -.001 .45 2.4 SiM4 1/3 2/3 -.001 .45 2.4 SiT1 0 0 .134 .48 1.9 SiT2 2/3 1/3 .369 .18 .1 O1 .357 0 .081 3.2 O2 .661 0 -.088 4.3 O3 1/3 2/3 .246 2.9 O4 0 0 .2500 7.8