data_global _chemical_name_mineral 'Holtite' loop_ _publ_author_name 'Kazantsev S S' 'Zubkova N V' 'Voloshin A V' _journal_name_full 'Crystallography Reports' _journal_volume 51 _journal_year 2006 _journal_page_first 412 _journal_page_last 413 _publ_section_title ; Refinement of composition and structure of holtite I ; _database_code_amcsd 0019738 _chemical_compound_source 'Voroni Tundry deposit, Kola Peninsula, Russia' _chemical_formula_sum 'Al6.24 Ta.248 Si2.499 Sb.343 As.13 B O17.499 H.52' _cell_length_a 4.695 _cell_length_b 11.906 _cell_length_c 20.38 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 1139.215 _exptl_crystal_density_diffrn 3.651 _symmetry_space_group_name_H-M 'P n m a' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,1/2-y,z' '-x,1/2+y,-z' '1/2-x,1/2+y,1/2+z' '1/2+x,1/2-y,1/2-z' '1/2+x,y,1/2-z' '1/2-x,-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_occupancy _atom_site_U_iso_or_equiv Al1 0.40140 0.75000 0.24989 0.60600 0.01420 Ta1 0.40140 0.75000 0.24989 0.24800 0.01420 Al2 0.55760 0.61046 0.47309 0.95500 0.00900 Al3 0.05930 0.49050 0.43184 0.96300 0.01030 Al4 0.05990 0.35970 0.29009 0.89900 0.01130 Si1 0.08890 0.75000 0.40642 0.83100 0.00970 Sb1* 0.11400 0.75000 0.38530 0.09300 0.01300 As1* 0.11400 0.75000 0.38530 0.06800 0.01300 Si2 0.58880 0.52312 0.32877 0.83400 0.01130 Sb2* 0.60920 0.56360 0.31676 0.12500 0.01190 As2* 0.60920 0.56360 0.31676 0.03100 0.01190 B 0.23100 0.25000 0.46650 1.00000 0.01300 O1 0.37840 0.75000 0.45640 1.00000 0.01250 O2 0.15690 0.75000 0.33040 0.83100 0.02000 O3 0.89280 0.63890 0.45510 1.00000 0.01400 O4 0.40290 0.43410 0.28220 1.00000 0.01380 O5 0.39570 0.55090 0.39440 1.00000 0.01250 O6 0.88310 0.45090 0.35120 1.00000 0.01390 O7 0.65930 0.63310 0.28860 0.83400 0.01850 O8 0.17150 0.25000 0.34930 1.00000 0.01740 O9 0.25360 0.35060 0.44760 1.00000 0.01050 O-H10 0.75670 0.25000 0.27390 0.52000 0.01630 O10 0.75670 0.25000 0.27390 0.48000 0.01630 O11 0.75110 0.46690 0.48870 1.00000 0.01140