data_global _chemical_name Diopside loop_ _publ_author_name 'Downs R T' 'Thompson R M' _journal_name_full "Crystallography Open Database, 7 March 2003" _publ_section_title ; The crystal structure of diopside to 10 GPa Sample at P = 9.50 GPa ; _cell_length_a 9.52700 _cell_length_b 8.65870 _cell_length_c 5.13060 _cell_angle_alpha 90.00000 _cell_angle_beta 105.06700 _cell_angle_gamma 90.00000 _symmetry_space_group_name_H-M C2/c loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_Uiso_or_equiv MgM1 0.00000 0.91060 0.25000 0.00494 CaM2 0.00000 0.30588 0.25000 0.00887 Si 0.28614 0.09547 0.22733 0.00633 O1 0.11520 0.08809 0.14222 0.00823 O2 0.35914 0.25645 0.32137 0.00861 O3 0.35342 0.02336 0.98756 0.00823