data_global _chemical_name_mineral 'Fernandinite' loop_ _publ_author_name 'Evans H T' 'Post J E' 'Ross D R' 'Nelen J A' _journal_name_full 'The Canadian Mineralogist' _journal_volume 32 _journal_year 1994 _journal_page_first 339 _journal_page_last 351 _publ_section_title ; The crystal structure and crystal chemistry of fernandinite and corvusite Minasragu, Peru, with general formula (Ca,Na,K)x(V,Fe,Ti)8O20.4H2O ; _database_code_amcsd 0005363 _chemical_compound_source 'Minasragu, Peru' _chemical_formula_sum 'V2 Ca.72 O5' _cell_length_a 11.680 _cell_length_b 3.6537 _cell_length_c 11.023 _cell_angle_alpha 90 _cell_angle_beta 105.00 _cell_angle_gamma 90 _cell_volume 454.380 _exptl_crystal_density_diffrn 3.081 _symmetry_space_group_name_H-M 'C 1 2/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' '-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 _atom_site_occupancy _atom_site_U_iso_or_equiv V1 0.80180 0.00000 0.13700 1.00000 0.01000 V2 0.09820 0.00000 0.13780 1.00000 0.01000 Ca1 0.06100 0.00000 0.50600 0.46000 0.02000 Ca2 0.56800 0.00000 0.47800 0.26000 0.02000 O1 0.94600 0.00000 0.09600 1.00000 0.01000 O2 0.84900 0.00000 0.28300 1.00000 0.01000 O3 0.62900 0.00000 0.12000 1.00000 0.01000 O4 0.27400 0.00000 0.10000 1.00000 0.01000 O5 0.11000 0.00000 0.28600 1.00000 0.01000