data_global _chemical_name_mineral 'Holtite' loop_ _publ_author_name 'Groat L A' 'Grew E S' 'Evans R J' 'Pieczka A' 'Ercit T S' _journal_name_full 'Mineralogical Magazine' _journal_volume 73 _journal_year 2009 _journal_page_first 1033 _journal_page_last 1050 _publ_section_title ; The crystal chemistry of holtite Sample: H3 ; _database_code_amcsd 0019927 _chemical_compound_source 'Greenbushes tinfield, Bridgetown-Greenbushes Shire, Australia' _chemical_formula_sum 'Al6.374 Ta.26 Si2.156 Sb.792 As.052 B O17.156' _cell_length_a 4.6900 _cell_length_b 11.897 _cell_length_c 20.385 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 1137.421 _exptl_crystal_density_diffrn 3.885 _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 0.40563 0.75000 0.24991 0.46000 0.00500 Ta1 0.40563 0.75000 0.24991 0.26000 0.00500 Al2 0.55710 0.61078 0.47353 0.99400 0.00390 Al3 0.05860 0.48992 0.43149 0.99200 0.00410 Al4 0.05980 0.35925 0.29023 0.97100 0.00610 Si1 0.08740 0.75000 0.40790 0.71800 0.00330 Sb1 0.11350 0.75000 0.38349 0.24000 0.00670 As1 0.11350 0.75000 0.38349 0.04200 0.00670 Si2 0.58780 0.52090 0.32970 0.71900 0.00410 Sb2 0.61080 0.56190 0.31676 0.27600 0.00600 As2 0.61080 0.56190 0.31676 0.00500 0.00600 B 0.22650 0.25000 0.41600 1.00000 0.00470 O1 0.37900 0.75000 0.45730 1.00000 0.00570 O2 0.16220 0.75000 0.33030 0.71800 0.00860 O3 0.89140 0.63800 0.42427 1.00000 0.00550 O4 0.40170 0.43490 0.28166 1.00000 0.00620 O5 0.39180 0.55070 0.39412 1.00000 0.00500 O6 0.88280 0.45060 0.35194 1.00000 0.00600 O7 0.66070 0.63310 0.28848 0.71900 0.00860 O8 0.17370 0.25000 0.35013 1.00000 0.00710 O9 0.25400 0.35060 0.44791 1.00000 0.00570 O10 0.76110 0.25000 0.27320 1.00000 0.00800 O11 0.75000 0.46730 0.48840 1.00000 0.00370