data_global
_chemical_name_mineral 'Apatite-(CaOH)'
loop_
_publ_author_name
'Hughes J M'
'Cameron M'
'Mariano A N'
_journal_name_full 'American Mineralogist'
_journal_volume 76 
_journal_year 1991
_journal_page_first 1165
_journal_page_last 1173
_publ_section_title
;
 Rare-earth-element ordering and structural variations in natural
 rare-earth-bearing apatites
 sample B from the Oka carbonatite
;
_database_code_amcsd 0001376
_chemical_formula_sum 'Ca4.557 Na.02 Ce.423 (P2.595 Si.405) O12.664 F.335 H.664'
_cell_length_a 9.4202
_cell_length_b 9.4202
_cell_length_c 6.9157
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 531.480
_exptl_crystal_density_diffrn      3.398
_symmetry_space_group_name_H-M 'P 63/m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x+y,-x,1/2-z'
  'x-y,x,1/2+z'
  'y,-x+y,-z'
  '-y,x-y,z'
  'x,y,1/2-z'
  '-x,-y,1/2+z'
  'x-y,x,-z'
  '-x+y,-x,z'
  '-y,x-y,1/2-z'
  'y,-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
Ca1   0.66667   0.33333   0.00040   0.93900   0.01394
Na1   0.66667   0.33333   0.00040   0.01000   0.01394
Ce1   0.66667   0.33333   0.00040   0.05100   0.01394
Ca2   0.99088   0.24301   0.25000   0.89300   0.01267
Ce2   0.99088   0.24301   0.25000   0.10700   0.01267
P   0.36896   0.39824   0.25000   0.86500   0.00925
Si   0.36896   0.39824   0.25000   0.13500   0.00925
O1   0.48420   0.32610   0.25000   1.00000   0.01368
O2   0.46590   0.58740   0.25000   1.00000   0.01710
O3   0.25670   0.34210   0.07080   1.00000   0.02178
F   0.00000   0.00000   0.25000   0.33500   0.02406
O-H   0.00000   0.00000   0.30400   0.33200   0.02913