data_global _chemical_name_mineral 'Yegorovite' loop_ _publ_author_name 'Zubkova N V' 'Pekov I V' 'Pushcharovskii D Y' 'Kazantsev S S' _journal_name_full 'Doklady Earth Sciences' _journal_volume 427 _journal_year 2009 _journal_page_first 814 _journal_page_last 818 _publ_section_title ; Crystal structure of yegorovite Na4[Si4O8(OH)4]*7H2O ; _database_code_amcsd 0012513 _chemical_compound_source 'Lovozero alkaline complex, Kola Peninsula, Russia' _chemical_formula_sum 'Na4 Si4 O19 H18' _cell_length_a 9.8744 _cell_length_b 12.3981 _cell_length_c 14.8973 _cell_angle_alpha 90 _cell_angle_beta 104.675 _cell_angle_gamma 90 _cell_volume 1764.289 _exptl_crystal_density_diffrn 1.982 _symmetry_space_group_name_H-M 'P 1 21/c 1' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,1/2-y,1/2+z' '-x,1/2+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_U_iso_or_equiv Na1 0.05320 0.61840 0.06992 0.02750 Na2 0.76350 0.86080 0.05829 0.02860 Na3 0.30450 0.89230 0.07159 0.03110 Na4 0.49020 0.62510 0.05502 0.02980 Si1 0.59375 0.82135 0.22737 0.01380 Si2 0.85409 0.68222 0.23240 0.01250 Si3 0.34122 0.67253 0.23305 0.01380 Si4 0.10049 0.83149 0.23761 0.01520 O1 0.06650 0.42650 0.08590 0.02790 H1a 0.03300 0.41200 0.12500 0.00500 H1b 0.13400 0.46300 0.10600 0.04000 O2 0.67510 0.69000 0.00020 0.02820 H2a 0.67300 0.67500 -0.05600 0.03000 H2b 0.69000 0.64000 0.04600 0.15000 O3 0.97830 0.79370 0.00890 0.03880 H3a 0.02700 0.85100 0.04500 0.05000 H3b 0.95800 0.80900 -0.05900 0.03400 O4 0.33370 0.75440 -0.02830 0.03650 H4a 0.25200 0.72400 -0.06200 0.08000 H4b 0.38900 0.78300 -0.06400 0.10000 O5 0.39590 0.61840 0.33210 0.01950 O6 0.90240 0.62740 0.33120 0.01650 O7 0.15490 0.88390 0.33760 0.02230 O8 0.65070 0.87880 0.32480 0.02490 O9 0.86970 0.60080 0.14810 0.01700 H9 0.86700 0.54000 0.15700 0.00300 O10 0.93850 0.79130 0.21610 0.01990 O11 0.43690 0.77110 0.21090 0.02180 O12 0.57960 0.90350 0.13850 0.02340 H12 0.62900 0.94700 0.17000 0.10000 O13 0.68760 0.71880 0.20820 0.01810 O14 0.18330 0.72190 0.21850 0.01850 O15 0.82700 0.04190 0.09220 0.02900 H15a 0.90800 0.07300 0.12000 0.00500 H15b 0.74600 0.05800 0.10700 0.08000 O16 0.32410 0.58910 0.14580 0.02010 H16 0.34600 0.53120 0.14800 0.01800 O17 0.11860 0.91360 0.15620 0.02100 H17 0.12300 0.97100 0.17200 0.09000 O18 0.57690 0.45850 0.10600 0.03030 H18a 0.65800 0.45200 0.11000 0.04000 H18b 0.53500 0.42800 0.13700 0.01800 O19 0.32820 0.07560 0.09440 0.02540 H19a 0.40500 0.09500 0.12300 0.03000 H19b 0.26100 0.11700 0.11700 0.10000