data_global _chemical_name_mineral 'Amblygonite' loop_ _publ_author_name 'Groat L A' 'Chakoumakos B C' 'Brouwer D H' 'Hoffman C M' 'Fyfe C A' 'Morell H' 'Schultz A J' _journal_name_full 'American Mineralogist' _journal_volume 88 _journal_year 2003 _journal_page_first 195 _journal_page_last 210 _publ_section_title ; The amblygonite (LiAlPO4F) - montebrasite (LiAlPO4OH) solid solution: A combined powder and single-crystal neutron diffraction and solid-state Li MAS, CP MAS, and REDOR NMR study Sample: from Chursdorf, near Penig, Saxony, Germany at T = 20 K ; _database_code_amcsd 0002970 _chemical_formula_sum 'P Al O4.23 F.05 H.23 Li' _cell_length_a 6.678 _cell_length_b 7.717 _cell_length_c 6.931 _cell_angle_alpha 90.59 _cell_angle_beta 117.65 _cell_angle_gamma 91.08 _cell_volume 316.263 _exptl_crystal_density_diffrn 2.809 _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 -0.01540 0.34040 0.25680 1.00000 0.00750 Al1 0.00000 0.00000 0.00000 1.00000 0.00970 Al2 0.00000 0.00000 0.50000 1.00000 0.00650 O1 -0.31600 0.01630 -0.14790 1.00000 0.00910 O2 0.29870 0.06100 0.58670 1.00000 0.00910 O3 0.09990 -0.22230 -0.38450 1.00000 0.00870 O4 0.02350 0.23260 0.09150 1.00000 0.00960 O 0.02360 0.08360 -0.23900 0.23000 0.01020 F 0.02360 0.08360 -0.23900 0.05000 0.01020 H 0.19700 0.14000 0.83800 0.23000 0.02000 Li1 0.04300 -0.32310 0.25300 0.64000 0.01700 Li2 0.06900 -0.32500 0.30700 0.36000 0.01000