data_global _chemical_name_mineral 'Montroseite' loop_ _publ_author_name 'Evans H T' 'Block S' _journal_name_full 'American Mineralogist' _journal_volume 38 _journal_year 1953 _journal_page_first 1242 _journal_page_last 1250 _publ_section_title ; The crystal structure of montroseite, a vanadium member of the diaspore group ; _database_code_amcsd 0000062 _chemical_formula_sum '(Fe.125 V.875) (O2 H)' _cell_length_a 4.54 _cell_length_b 9.97 _cell_length_c 3.03 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 137.149 _exptl_crystal_density_diffrn 4.095 _symmetry_space_group_name_H-M 'P b n m' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,y,1/2-z' '-x,-y,1/2+z' '1/2+x,1/2-y,1/2+z' '1/2-x,1/2+y,1/2-z' '1/2-x,1/2+y,z' '1/2+x,1/2-y,-z' '-x,-y,-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 Fe -0.05100 0.14500 0.25000 0.12500 0.00507 V -0.05100 0.14500 0.25000 0.87500 0.00507 O-H1 0.29700 -0.19700 0.25000 1.00000 0.00507 O2 -0.19700 -0.05100 0.25000 1.00000 0.00507