data_global _chemical_name_mineral 'Amblygonite' loop_ _publ_author_name 'Groat L A' 'Raudsepp M' 'Hawthorne F C' 'Ercit T S' 'Sherriff B L' 'Hartman J S' _journal_name_full 'American Mineralogist' _journal_volume 75 _journal_year 1990 _journal_page_first 992 _journal_page_last 1008 _publ_section_title ; The amblygonite-montebrasite series: Characterization by single-crystal structure refinement, infrared spectroscopy and multinuclear MAS-NMR spectroscopy sample AF-65 ; _database_code_amcsd 0001326 _chemical_formula_sum 'P Al O4.119 (F.881 Li) H.119' _cell_length_a 6.6452 _cell_length_b 7.733 _cell_length_c 6.9193 _cell_angle_alpha 90.35 _cell_angle_beta 117.44 _cell_angle_gamma 91.20 _cell_volume 315.442 _exptl_crystal_density_diffrn 3.109 _symmetry_space_group_name_H-M 'C -1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,z' '-x,-y,-z' '1/2-x,1/2-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 P -0.01328 0.33910 0.25586 1.00000 0.00560 Al1 0.00000 0.00000 0.00000 1.00000 0.00610 Al2 0.00000 0.00000 0.50000 1.00000 0.00570 O1 -0.31520 0.01880 -0.14250 1.00000 0.00870 O2 0.29880 0.06060 0.58820 1.00000 0.00900 O3 0.09950 -0.22100 -0.38270 1.00000 0.00820 O4 0.02850 0.23170 0.09240 1.00000 0.00970 F 0.01940 0.08280 -0.24100 0.88100 0.01020 O-H 0.01940 0.08280 -0.24100 0.11900 0.01020 Li1 0.03760 -0.32300 0.24200 0.50000 0.01970 Li2 0.05100 -0.32400 0.30100 0.50000 0.01970