data_global _chemical_name_mineral 'Lamprophyllite' loop_ _publ_author_name 'Krivovichev S V' 'Armbruster T' 'Yakovenchuk V N' 'Pakhomovsky Y A' 'Men'shikov Y P' _journal_name_full 'European Journal of Mineralogy' _journal_volume 15 _journal_year 2003 _journal_page_first 711 _journal_page_last 718 _publ_section_title ; Crystal structures of lamprophyllite-2M and lamprophyllite-2O from the Lovozero alkaline massif, Kola peninsula, Russia Note: displacement factors have been altered by Krivovichev, November 2003 ; _database_code_amcsd 0007012 _chemical_compound_source 'Lovozero alkaline massif, Kola peninsula, Russia' _chemical_formula_sum 'Ti3 Si4 Na3 Sr2 (O18 H2)' _cell_length_a 19.215 _cell_length_b 7.061 _cell_length_c 5.3719 _cell_angle_alpha 90 _cell_angle_beta 96.797 _cell_angle_gamma 90 _cell_volume 723.721 _exptl_crystal_density_diffrn 3.626 _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_U_iso_or_equiv Ti1 0.15057 0.00000 0.70775 0.00560 Ti2 0.00000 0.50000 0.00000 0.02460 Si 0.14390 0.28459 0.20490 0.00780 Na1 0.00000 0.25900 0.50000 0.01020 Na2 0.00000 0.00000 0.00000 0.01740 Sr 0.28418 0.00000 0.26213 0.01530 O-H1 0.44250 0.00000 0.27580 0.01690 O2 0.17480 0.18890 0.46740 0.01550 O3 0.17532 0.18750 0.97120 0.01430 O4 0.17770 0.50000 0.22000 0.01130 O5 0.05951 0.29650 0.17250 0.01270 O6 0.06230 0.00000 0.66770 0.02000 loop_ _atom_site_aniso_label _atom_site_aniso_U_11 _atom_site_aniso_U_22 _atom_site_aniso_U_33 _atom_site_aniso_U_12 _atom_site_aniso_U_13 _atom_site_aniso_U_23 Ti1 0.00740 0.00460 0.00450 0.00000 0.00000 0.00000 Ti2 0.02880 0.00500 0.03390 0.00000 -0.02220 0.00000 Si 0.01030 0.00510 0.00780 0.00100 0.00000 0.00040 Na1 0.01460 0.00770 0.00850 0.00000 0.00270 0.00000 Na2 0.01900 0.01700 0.01720 0.00000 0.00620 0.00000 Sr 0.02140 0.01280 0.01160 0.00000 0.00090 0.00000 O-H1 0.01600 0.01400 0.02200 0.00000 0.00500 0.00000 O2 0.01550 0.01580 0.01460 -0.00280 -0.00050 0.00610 O3 0.01270 0.01380 0.01660 -0.00210 0.00280 -0.00540 O4 0.01300 0.00500 0.01500 0.00000 -0.00130 0.00000 O5 0.00920 0.00870 0.01980 0.00050 -0.00010 -0.00180 O6 0.01200 0.03500 0.01300 0.00000 0.00020 0.00000