#------------------------------------------------------------------------------ #$Date: 2009-11-18 16:56:34 +0200 (Wed, 18 Nov 2009) $ #$Revision: 858 $ #$URL: file:///home/coder/svn-repositories/cod/cif/9/9006821.cif $ #------------------------------------------------------------------------------ # # This file is available in the Crystallography Open Database (COD), # http://www.crystallography.net/ # # All data on this site have been placed in the public domain by the # contributors. # data_9006821 loop_ _publ_author_name 'Millard R L' 'Peterson R C' 'Swainson I P' _publ_section_title ; Synthetic MgGa2O4-Mg2GeO4 spinel solid solution and beta-Mg3Ga2GeO8: chemistry, crystal structures, cation ordering, and comparison to Mg2GeO4 olivine Sample: RLM812, beta-Mg3Ga2GeO8 spinelloid, quenched from T = 1350 C Locality: synthetic ; _journal_name_full 'Physics and Chemistry of Minerals' _journal_page_first 179 _journal_page_last 193 _journal_volume 27 _journal_year 2000 _chemical_formula_sum 'Ga Ge0.5 Mg1.5 O4' _[local]_cod_chemical_formula_sum_orig 'Mg1.5 Ga Ge.5 O4' _chemical_name_mineral Mg3Ga2GeO8 _symmetry_space_group_name_H-M 'I m m a' _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_length_a 5.8236 _cell_length_b 11.8162 _cell_length_c 8.3304 _cell_volume 573.238 loop_ _symmetry_equiv_pos_as_xyz x,y,z 1/2+x,1/2+y,1/2+z x,1/2-y,z 1/2+x,-y,1/2+z -x,1/2+y,-z 1/2-x,+y,1/2-z -x,y,z 1/2-x,1/2+y,1/2+z x,-y,-z 1/2+x,1/2-y,1/2-z x,1/2+y,-z 1/2+x,+y,1/2-z -x,1/2-y,z 1/2-x,-y,1/2+z -x,-y,-z 1/2-x,1/2-y,1/2-z loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy _atom_site_U_iso_or_equiv MgM1 0.00000 0.00000 0.00000 0.50000 0.00355 GaM1 0.00000 0.00000 0.00000 0.50000 0.00355 MgM2 0.00000 0.25000 0.97600 0.96000 0.00355 GaM2 0.00000 0.25000 0.97600 0.04000 0.00355 MgM3 0.25000 0.12910 0.25000 0.77000 0.00355 GaM3 0.25000 0.12910 0.25000 0.23000 0.00355 GaT 0.00000 0.11620 0.61860 0.50000 0.00380 GeT 0.00000 0.11620 0.61860 0.50000 0.00380 O1 0.00000 0.25000 0.22650 1.00000 0.00583 O2 0.00000 0.25000 0.73490 1.00000 0.00583 O3 0.00000 0.00590 0.24910 1.00000 0.00583 O4 0.24230 0.12270 0.00270 1.00000 0.00583