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 AF-46: from Karibib, South Africa at T = 100 K
 Natural Museum of Natural History, Washington D.C. #105914
;
_database_code_amcsd 0002967
_chemical_formula_sum 'P Al O4.44 F.54 H.44 Li1.02'
_cell_length_a 6.6774
_cell_length_b 7.7086
_cell_length_c 6.9513
_cell_angle_alpha 90.812
_cell_angle_beta 117.697
_cell_angle_gamma 91.294
_cell_volume 316.605
_exptl_crystal_density_diffrn      3.079
_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   0.98440   0.34098   0.26080   1.00000   0.00430
Al1   0.00000   0.00000   0.00000   1.00000   0.00400
Al2   0.00000   0.00000   0.50000   1.00000   0.00340
O1  -0.31670   0.01539  -0.15260   1.00000   0.00590
O2   0.29810   0.06028   0.58140   1.00000   0.00650
O3   0.10070  -0.22271  -0.38700   1.00000   0.00540
O4   0.02370   0.23331   0.09570   1.00000   0.00660
O   0.03310   0.08558  -0.23410   0.44000   0.00670
F   0.03310   0.08558  -0.23410   0.54000   0.00670
H   0.20280   0.13710   0.84450   0.44000   0.01800
Li1   0.05000  -0.32220   0.25300   0.35000   0.00800
Li2   0.06660  -0.32270   0.31300   0.67000   0.01100