data_global _chemical_name_mineral 'Barytolamprophyllite' loop_ _publ_author_name 'Rastsvetaeva R K' 'Dorfman M D' _journal_name_full 'Crystallography Reports' _journal_volume 40 _journal_year 1995 _journal_page_first 951 _journal_page_last 954 _publ_section_title ; Crystal structure of Ba-lamprophyllite in the isomorphous lamprophyllite- baritolamprophyllite series ; _database_code_amcsd 0012348 _chemical_compound_source 'Khibiny Massif' _chemical_formula_sum '(Sr1.1 Ba.9) Na2.8 Mn.2 (Ti2.1 Fe.6) Mg.3 Si4 (O18 H2)' _cell_length_a 19.744 _cell_length_b 7.099 _cell_length_c 5.409 _cell_angle_alpha 90 _cell_angle_beta 96.77 _cell_angle_gamma 90 _cell_volume 752.854 _exptl_crystal_density_diffrn 3.701 _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 _atom_site_U_iso_or_equiv SrM1 0.28350 0.00000 0.26330 0.55000 0.01507 BaM1 0.28350 0.00000 0.26330 0.45000 0.01507 Na 0.00000 0.00000 0.00000 1.00000 0.01900 NaM2 0.00000 0.26130 0.50000 0.90000 0.01203 MnM2 0.00000 0.26130 0.50000 0.10000 0.01203 Ti1 0.14690 0.00000 0.70570 0.70000 0.01039 Fe1 0.14690 0.00000 0.70570 0.30000 0.01039 Ti2 0.00000 0.50000 0.00000 0.70000 0.01950 Mg2 0.00000 0.50000 0.00000 0.30000 0.01950 Si 0.14030 0.28420 0.20200 1.00000 0.00887 O-H1 0.44290 0.00000 0.26730 1.00000 0.01773 O2 0.17150 0.18910 0.46350 1.00000 0.01317 O3 0.17220 0.18810 0.97030 1.00000 0.01381 O4 0.17300 0.50000 0.21730 1.00000 0.01178 O5 0.05810 0.29570 0.16960 1.00000 0.01267 O6 0.06220 0.00000 0.67020 1.00000 0.01773