data_global _chemical_name_mineral 'Epidote' loop_ _publ_author_name 'Ito T' _journal_name_full 'American Mineralogist' _journal_volume 32 _journal_year 1947 _journal_page_first 309 _journal_page_last 321 _publ_section_title ; The structure of epidote (HCa2(Al,Fe)Al2Si3O13) ; _database_code_amcsd 0000041 _chemical_formula_sum 'Ca2 Al2 Fe Si3 O13 H' _cell_length_a 8.96 _cell_length_b 5.63 _cell_length_c 10.20 _cell_angle_alpha 90 _cell_angle_beta 115.40 _cell_angle_gamma 90 _cell_volume 464.799 _exptl_crystal_density_diffrn 3.453 _symmetry_space_group_name_H-M 'P 1 21/m 1' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,1/2-y,z' '-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 Ca1 0.96300 0.25000 0.64100 1.00000 Ca2 0.96300 0.75000 0.64100 1.00000 Al 0.78900 0.25000 0.81400 1.00000 Fe 0.00000 0.00000 0.00000 1.00000 Si1 0.39400 0.25000 0.71100 0.75000 Al1 0.39400 0.25000 0.71100 0.25000 Si2 0.60400 0.75000 0.69500 0.75000 Al2 0.60400 0.75000 0.69500 0.25000 Si3 0.58200 0.25000 0.55300 0.75000 Al3 0.58200 0.25000 0.55300 0.25000 Si4 0.37500 0.75000 0.94000 0.75000 Al4 0.37500 0.75000 0.94000 0.25000 O1 0.04200 0.00000 0.84300 1.00000 O2 0.30100 0.00000 0.74200 1.00000 O3 0.78300 0.00000 0.69400 1.00000 O4 0.53500 0.25000 0.82100 1.00000 O5 0.53500 0.75000 0.82100 1.00000 O6 0.42000 0.25000 0.58200 1.00000 O7 0.42000 0.75000 0.58200 1.00000 O8 0.00000 0.00000 0.50000 1.00000 O9 0.17900 0.75000 0.03300 1.00000 O-H10 0.17900 0.25000 0.03300 1.00000