data_global _chemical_name_mineral 'Trolleite' loop_ _publ_author_name 'Moore P B' 'Araki T' _journal_name_full 'American Mineralogist' _journal_volume 59 _journal_year 1974 _journal_page_first 974 _journal_page_last 984 _publ_section_title ; Trolleite, Al4(OH)3[PO4]3: A very dense structure with octahedral face-sharing dimers ; _database_code_amcsd 0000415 _chemical_formula_sum 'Al4 P3 O15 H3' _cell_length_a 18.894 _cell_length_b 7.161 _cell_length_c 7.162 _cell_angle_alpha 90 _cell_angle_beta 99.99 _cell_angle_gamma 90 _cell_volume 954.326 _exptl_crystal_density_diffrn 3.089 _symmetry_space_group_name_H-M 'I 1 2/c 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,1/2+z' 'x,-y,1/2+z' '1/2+x,1/2-y,+z' '-x,y,1/2-z' '1/2-x,1/2+y,-z' '-x,-y,-z' '1/2-x,1/2-y,1/2-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Al1 0.16778 -0.00654 0.32059 0.00481 Al2 0.07570 0.27118 0.41714 0.00545 P1 0.00000 0.88269 0.25000 0.00443 P2 0.16844 0.36728 0.08109 0.00456 O1 0.06458 0.01173 0.32611 0.00760 O2 0.02064 0.76272 0.09579 0.00937 O3 0.23738 0.46488 0.16861 0.00925 O4 0.11114 0.50844 0.00803 0.00925 O5 0.14191 0.24551 0.23708 0.00709 O6 0.18216 0.23516 -0.07554 0.00950 O-h1 0.00000 0.36428 0.25000 0.00785 O-h2 0.16141 0.87900 0.06966 0.00671 H1 0.00000 0.48400 0.25000 ? H2 0.19000 0.80900 0.07200 ?