data_global _chemical_name_mineral 'Murmanite' loop_ _publ_author_name 'Khalilov A D' 'Mamedov K S' 'Makarov E S' 'Pyanzina L A' _journal_name_full 'Doklady Akademii Nauk SSSR' _journal_volume 161 _journal_year 1965 _journal_page_first 1409 _journal_page_last 1411 _publ_section_title ; Crystal structure of murmanite ; _database_code_amcsd 0012444 _chemical_formula_sum 'Na2 Mn Ti3 (O22 Si4) H12' _cell_length_a 5.50 _cell_length_b 7.00 _cell_length_c 11.94 _cell_angle_alpha 96.00 _cell_angle_beta 100.433 _cell_angle_gamma 88.916 _cell_volume 449.613 _exptl_crystal_density_diffrn 2.663 _symmetry_space_group_name_H-M 'P 1' loop_ _space_group_symop_operation_xyz 'x,y,z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Na1 0.99000 0.51000 0.00000 Na2 0.49200 0.77500 0.00000 Mn 0.96600 0.00500 0.00200 Ti1 0.51200 0.26000 0.01000 Ti2 0.92500 0.79500 0.25300 Ti3 0.52500 0.94500 0.72000 O-H3 0.86200 0.22000 0.09100 O-H4 0.86200 0.78700 0.10000 Si1 0.42500 0.09700 0.23300 Si2 0.42500 0.55500 0.23000 Si3 0.07500 0.21000 0.75000 Si4 0.08500 0.72500 0.74500 O1 0.35000 0.06000 0.08500 O2 0.35000 0.54200 0.08400 O5 0.42500 0.27000 0.25000 O6 0.17500 0.00000 0.27500 O7 0.17500 0.60500 0.27100 O8 0.65200 0.00000 0.29900 O9 0.66200 0.60000 0.27500 Wat10 0.94500 0.30000 0.43900 Wat11 0.98500 0.80800 0.45500 Wat12 0.51000 0.45000 0.54300 Wat13 0.50000 0.95000 0.51700 O14 0.30300 0.21000 0.70400 O15 0.31500 0.75500 0.71600 O18 0.83500 0.20000 0.72700 O17 0.82300 0.71000 0.69500 O1? 0.06500 0.47500 0.75000 O19 0.11000 0.20000 0.89500 O20 0.12500 0.76300 0.90000 O-H21 0.62300 0.49700 0.89300 O-H22 0.62500 0.00000 0.90500