data_global _chemical_name_mineral 'Sitinakite' loop_ _publ_author_name 'Sokolova E V' 'Rastsvetaeva R K' 'Andrianov V I' 'Egorov-Tismenko Y K' 'Men'shikov Y P' _journal_name_full 'Soviet Physics Doklady' _journal_volume 34 _journal_year 1989 _journal_page_first 583 _journal_page_last 585 _publ_section_title ; The crystal structure of a new sodium titanosilicate ; _database_code_amcsd 0015618 _chemical_compound_source 'Khibinskii alkaline massif, Russia' _chemical_formula_sum 'Na2.11 K.69 (Ti3.8 Nb.2) Si2 O17.69 H7.381' _cell_length_a 7.819 _cell_length_b 7.819 _cell_length_c 12.099 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 739.694 _exptl_crystal_density_diffrn 2.796 _symmetry_space_group_name_H-M 'P 42/m c m' loop_ _space_group_symop_operation_xyz 'x,y,z' '-y,-x,z' 'y,x,-z' 'y,-x,1/2-z' '-y,x,1/2+z' 'x,-y,1/2+z' '-x,y,1/2-z' 'x,y,-z' '-x,-y,z' 'y,x,z' '-y,-x,-z' '-y,x,1/2-z' 'y,-x,1/2+z' '-x,y,1/2+z' 'x,-y,1/2-z' '-x,-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 Na 0.00000 0.50000 0.00000 1.00000 0.04179 K1 0.39800 0.39800 0.50000 0.19250 0.06459 K2 0.46300 0.46300 0.37200 0.07630 0.08486 Ti 0.13870 0.13870 0.65350 0.95000 0.00785 NbTi 0.13870 0.13870 0.65350 0.05000 0.00785 Si 0.00000 0.50000 0.25000 1.00000 0.01317 O2 0.14260 0.14260 0.50000 1.00000 0.01267 O3 0.11420 0.11420 0.17230 1.00000 0.01520 O4 0.11950 0.38280 0.67000 1.00000 0.01646 Wat1 0.26900 0.26900 0.00000 1.00000 0.04306 Wat5 0.50000 0.50000 0.25000 0.82000 0.05953 Wat6 0.50000 0.50000 0.31000 0.10000 0.08359 Wat7 0.47800 0.47800 0.42100 0.09880 0.08106 Wat8 0.42000 0.42000 0.16100 0.06880 0.05573 Na8 0.42000 0.42000 0.16100 0.02750 0.05573