data_global _chemical_name_mineral 'Epidote' loop_ _publ_author_name 'Nagashima M' 'Akasada M' _journal_name_full 'American Mineralogist' _journal_volume 95 _journal_year 2010 _journal_page_first 1237 _journal_page_last 1246 _publ_section_title ; X-ray Rietveld and 57Fe Mossbauer studies of epidote and piemontite on the join Ca2Al2FeSi3O12(OH) - Ca2Al2MnSi3O12(OH) formed by hydrothermal synthesis Sample: q=1.0, run 41 ; _database_code_amcsd 0016949 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'Ca2 Al2.09 Fe.91 Si3 O13 H' _cell_length_a 8.8902 _cell_length_b 5.6366 _cell_length_c 10.1600 _cell_angle_alpha 90 _cell_angle_beta 115.432 _cell_angle_gamma 90 _cell_volume 459.786 _exptl_crystal_density_diffrn 3.472 _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 Ca 0.75280 0.75000 0.14980 1.00000 Ca 0.60920 0.75000 0.42220 1.00000 AlM1 0.00000 0.00000 0.00000 0.84000 FeM1 0.00000 0.00000 0.00000 0.16000 AlM2 0.00000 0.00000 0.50000 1.00000 AlM3 0.29590 0.25000 0.22620 0.25000 FeM3 0.29590 0.25000 0.22620 0.75000 Si 0.33800 0.75000 0.04610 1.00000 Si 0.68140 0.25000 0.27660 1.00000 Si 0.18850 0.75000 0.32400 1.00000 O1 0.23500 0.99300 0.04100 1.00000 O2 0.30500 0.97700 0.35500 1.00000 O3 0.79800 0.01500 0.34200 1.00000 O4 0.05200 0.25000 0.12900 1.00000 O5 0.03600 0.75000 0.15100 1.00000 O6 0.06200 0.75000 0.41100 1.00000 O7 0.51600 0.75000 0.17300 1.00000 O8 0.52400 0.25000 0.30900 1.00000 O9 0.64600 0.25000 0.10400 1.00000 O-H10 0.07100 0.25000 0.42500 1.00000