data_global _chemical_name_mineral 'Shafranovskite' loop_ _publ_author_name 'Krivovichev S V' 'Yakovenchuk V N' 'Armbruster T' 'Pakhomovsky Y A' 'Weber H-P' 'Depmeier W' _journal_name_full 'American Mineralogist' _journal_volume 89 _journal_year 2004 _journal_page_first 1816 _journal_page_last 1821 _publ_section_title ; Synchrotron X-ray diffraction study of the structure of shafranovskite, K2Na3(Mn,Fe,Na)4[Si9(O,OH)27].nH2O, a rare manganese silicate from Kola peninsula, Russia ; _database_code_amcsd 0003660 _chemical_compound_source 'Kola peninsula, Russia' _chemical_formula_sum 'Na9 K5.7 Mn10.86 Si26.72 O87.72 H35.72' _cell_length_a 14.519 _cell_length_b 14.519 _cell_length_c 21.062 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 3845.065 _exptl_crystal_density_diffrn 2.778 _symmetry_space_group_name_H-M 'P 3 1 c' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x-y,-y,1/2+z' '-y,x-y,z' 'y,x,1/2+z' '-x+y,-x,z' '-x,-x+y,1/2+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 Na1 0.06810 0.56020 0.70520 1.00000 0.04300 Na2 0.22520 0.82300 0.72480 1.00000 0.04300 Na3 0.92060 0.43950 0.44980 1.00000 0.09600 K1 0.19090 0.74940 0.45610 1.00000 0.08100 K2 0.14640 0.91660 0.98650 0.90000 0.06800 Mn1 0.96290 0.71690 0.71758 1.00000 0.03300 Mn2 0.91500 0.29780 0.71055 1.00000 0.03000 Mn3 0.85630 0.87670 0.73760 0.82000 0.04100 Mn4 0.80920 0.45690 0.69027 0.80000 0.02800 Si1 0.95270 0.62710 0.57340 1.00000 0.03530 Si2 0.00000 0.00000 0.60800 1.00000 0.03300 Si3 0.95110 0.80830 0.86250 1.00000 0.05100 Si4 0.05460 0.67030 0.84640 1.00000 0.04110 Si5 0.09960 0.86210 0.59780 1.00000 0.03530 Si6 0.70820 0.52290 0.56760 1.00000 0.03530 Si7 0.99160 0.29230 0.85470 1.00000 0.04300 Si8 0.89780 0.43200 0.82880 1.00000 0.03930 Si9 0.05630 0.39640 0.58490 1.00000 0.03430 Si10 0.66667 0.33333 0.81970 1.00000 0.03800 Si11 0.66667 0.33333 0.49230 0.72000 0.03500 O1 0.09640 0.84460 0.67370 1.00000 0.04100 O2 0.94960 0.60040 0.64520 1.00000 0.04300 O3 0.04640 0.39890 0.65720 1.00000 0.04400 O-H4 0.84080 0.74110 0.67390 1.00000 0.05100 O5 0.88240 0.92400 0.57750 1.00000 0.03300 O6 0.66270 0.60020 0.55060 1.00000 0.05000 O-H7 0.81560 0.58690 0.75180 1.00000 0.04300 O-H8 0.13140 0.51100 0.55210 1.00000 0.06000 O9 0.21250 0.89240 0.56510 1.00000 0.03700 O-H10 0.08930 0.36680 0.89740 1.00000 0.07500 O11 0.06550 0.69290 0.77220 1.00000 0.03900 O12 0.79800 0.30950 0.63950 1.00000 0.06700 O13 0.82620 0.75040 0.88250 1.00000 0.06000 O-H14 0.15700 0.70870 0.88440 1.00000 0.06500 O-H15 0.66667 0.33333 0.41640 0.72000 0.05500 O16 0.97450 0.84560 0.78910 1.00000 0.06800 O17 0.71490 0.72770 0.78020 1.00000 0.04400 O18 0.00000 0.00000 0.68260 1.00000 0.04100 O-H19 0.01000 0.90450 0.91100 1.00000 0.06900 O-H20 0.00760 0.58500 0.52320 1.00000 0.04500 O21 0.08920 0.43070 0.36460 1.00000 0.04600 O22 0.64710 0.42330 0.51960 1.00000 0.04800 O23 0.98560 0.72030 0.87850 1.00000 0.05900 O24 0.75460 0.16950 0.54810 1.00000 0.04600 Wat25 0.45690 0.78110 0.63850 1.00000 0.08600 O26 0.00960 0.75360 0.56160 1.00000 0.04000 O27 0.66667 0.33333 0.74250 1.00000 0.04400 O28 0.90870 0.42670 0.75570 1.00000 0.04000 O29 0.98530 0.54500 0.86380 1.00000 0.04500 Wat30 0.35000 0.79670 0.78530 1.00000 0.08000 O31 0.78110 0.41290 0.84910 1.00000 0.04900 Wat32 0.33333 0.66667 0.49320 1.00000 0.17400