data_global _chemical_name_mineral 'Saamite' loop_ _publ_author_name 'Camara F' 'Sokolova E' 'Abdu Y A' 'Hawthorne F C' _journal_name_full 'The Canadian Mineralogist' _journal_volume 52 _journal_year 2014 _journal_page_first 745 _journal_page_last 761 _publ_section_title ; Saamite, Ba[]TiNbNa3Ti(Si2O7)2O2(OH)2(H2O)2, a group-III Ti-disilicate mineral from the Khibiny alkaline massif, Kola Peninsula, Russia: description and crystal structure ; _database_code_amcsd 0020471 _chemical_compound_source 'Kirovskii mine, Khibiny alkaline massif, Kola Peninsula, Russia' _chemical_formula_sum 'Ba.61 Sr.2 K.13 Na2.22 Mn.68 Fe.04 Nb.76 Ti2.09 Al.01 Mg.01 Ca.26 Si4 O19.26 F.74 H5.26' _cell_length_a 5.437 _cell_length_b 7.141 _cell_length_c 21.69 _cell_angle_alpha 92.97 _cell_angle_beta 96.07 _cell_angle_gamma 90.01 _cell_volume 836.268 _exptl_crystal_density_diffrn 3.250 _symmetry_space_group_name_H-M 'P -1' loop_ _space_group_symop_operation_xyz 'x,y,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 Ba1 0.76170 0.75515 0.03112 0.61000 0.00900 Sr1 0.76170 0.75515 0.03112 0.20000 0.00900 K1 0.76170 0.75515 0.03112 0.13000 0.00900 Na1 0.49670 0.28730 0.23030 0.81000 0.02200 Na2 -0.00110 0.02980 0.23020 0.72000 0.02080 Mn2 -0.00110 0.02980 0.23020 0.26000 0.02080 Fe1 -0.00110 0.02980 0.23020 0.02000 0.02080 Na3 -0.00170 0.54310 0.23030 0.69000 0.02110 Mn3 -0.00170 0.54310 0.23030 0.29000 0.02110 Fe2 -0.00170 0.54310 0.23030 0.02000 0.02110 Nb1 0.19810 0.30800 0.37000 0.55000 0.01410 Ti1 0.19810 0.30800 0.37000 0.45000 0.01410 Ti2 0.79060 0.26590 0.09441 0.87000 0.00790 Nb2 0.79060 0.26590 0.09441 0.12000 0.00790 Al1 0.79060 0.26590 0.09441 0.01000 0.00790 Ti3 0.50740 0.78570 0.22492 0.77000 0.02040 Mn1 0.50740 0.78570 0.22492 0.13000 0.02040 Nb3 0.50740 0.78570 0.22492 0.09000 0.02040 Mg1 0.50740 0.78570 0.22492 0.01000 0.02040 Ca1 0.20900 0.81900 0.39060 0.26000 0.02100 Si1 0.69080 0.01890 0.35550 1.00000 0.01900 Si2 0.69130 0.59350 0.35550 1.00000 0.01920 Si3 0.29370 0.98280 0.10040 1.00000 0.00770 Si4 0.29310 0.55190 0.10030 1.00000 0.00850 O1 0.66000 -0.00240 0.28050 1.00000 0.01600 O2 0.45800 0.11900 0.38430 1.00000 0.03500 O3 0.70700 0.80800 0.38520 1.00000 0.03000 O4 0.95300 0.12000 0.38240 1.00000 0.03700 O5 0.65900 0.59130 0.28100 1.00000 0.01700 O6 0.45900 0.50000 0.38310 1.00000 0.04100 O7 0.95300 0.50300 0.38120 1.00000 0.04000 O8 0.32200 0.98350 0.17450 1.00000 0.01400 O9 0.52770 0.07320 0.07150 1.00000 0.01100 O10 0.03590 0.07370 0.07170 1.00000 0.01100 O11 0.27900 0.76230 0.07050 1.00000 0.01200 O12 0.32400 0.57180 0.17470 1.00000 0.01600 O13 0.03500 0.45130 0.07170 1.00000 0.01000 O14 0.52480 0.44570 0.07170 1.00000 0.01000 O15 0.16700 0.29100 0.28710 1.00000 0.03100 O16 0.82900 0.27890 0.17300 1.00000 0.01800 O-H17 0.76200 0.77830 0.17540 0.63000 0.02100 F1 0.76200 0.77830 0.17540 0.37000 0.02100 O-H18 0.21500 0.79000 0.27830 0.63000 0.02500 F2 0.21500 0.79000 0.27830 0.37000 0.02500 Wat19 0.23800 0.33000 0.47920 1.00000 0.05600 Wat20 0.24900 0.74200 0.49560 0.75000 0.05300 Wat21 0.25000 0.86000 0.43200 0.25000 0.05000