data_global _chemical_name_mineral 'Dozyite' loop_ _publ_author_name 'Banfield J F' 'Bailey S W' _journal_name_full 'American Mineralogist' _journal_volume 81 _journal_year 1996 _journal_page_first 79 _journal_page_last 91 _publ_section_title ; Formation of regularly interstatified serpentine-chlorite minerals by tetrahedral inversion in long-period serpentine polytypes ; _database_code_amcsd 0001773 _chemical_formula_sum 'Mg3 O9 Si2' _cell_length_a 5.323 _cell_length_b 9.214 _cell_length_c 21.381 _cell_angle_alpha 90 _cell_angle_beta 90.00 _cell_angle_gamma 90 _cell_volume 1048.655 _exptl_crystal_density_diffrn 2.595 _symmetry_space_group_name_H-M 'C 1 m 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,z' 'x,-y,z' '1/2+x,1/2-y,z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Mg 0.00000 0.00000 0.00000 Mg 0.00000 0.33330 0.00000 O 0.33330 0.00000 0.04930 O 0.33330 0.33330 0.05130 Si 0.33330 0.33330 0.12780 O 0.83330 0.00000 0.15540 O 0.08330 0.25000 0.15540 O 0.66670 0.00000 0.28650 O 0.66670 0.33330 0.28650 Mg 0.00000 0.00000 0.33330 Mg 0.00000 0.33330 0.33330 O 0.00000 0.00000 0.38010 O 0.33330 0.33330 0.38010 O 0.16670 0.00000 0.51120 O 0.41670 0.25000 0.51120 Si 0.66670 0.33330 0.53880 O 0.66670 0.00000 0.61730 O 0.66670 0.33330 0.61530 Mg 0.00000 0.00000 0.66670 Mg 0.00000 0.33330 0.66670 O 0.33330 0.00000 0.71350 O 0.33330 0.33330 0.71350 O 0.16670 0.00000 0.84460 O 0.41670 0.25000 0.84460 Si 0.66670 0.33330 0.87220 O 0.66670 0.00000 0.95070 O 0.66670 0.33330 0.94870