data_global _chemical_name_mineral 'Celadonite' loop_ _publ_author_name 'Zhukhlistov A P' 'Zvyagin B B' 'Lazarenko E K' 'Pavlishin V I' _journal_name_full 'Kristallografiya' _journal_volume 22 _journal_year 1977 _journal_page_first 498 _journal_page_last 504 _publ_section_title ; Refinement of the crystal structure of ferrous celadonite ; _database_code_amcsd 0014183 _chemical_compound_source 'Krivoi mine, Khibiny Massif, Kola Peninsula, Russia' _chemical_formula_sum 'K.78 Ca.04 Mg.61 Fe1.39 (Si3.67 Al.33) O12 H2' _cell_length_a 5.20 _cell_length_b 9.00 _cell_length_c 10.25 _cell_angle_alpha 90 _cell_angle_beta 100.1 _cell_angle_gamma 90 _cell_volume 472.266 _exptl_crystal_density_diffrn 3.028 _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 K 0.50000 0.00000 0.50000 0.78000 Ca 0.50000 0.00000 0.50000 0.04000 Mg 0.50000 0.16480 0.00000 0.30500 Fe3+ 0.50000 0.16480 0.00000 0.54000 Fe2+ 0.50000 0.16480 0.00000 0.15500 Si 0.42100 0.33260 0.27500 0.91750 Al 0.42100 0.33260 0.27500 0.08250 O1 0.36700 0.32400 0.11100 1.00000 O2 0.18700 0.25400 0.33800 1.00000 O3 0.44500 0.50000 0.33800 1.00000 O-H 0.38600 0.00000 0.11600 1.00000