data_1010647
_chemical_name_systematic          'Pentacalcium fluoride tris(phosphate)'
_chemical_formula_structural       'Ca5 F (P O4)3'
_chemical_formula_sum              'Ca5 F O12 P3'
_publ_section_title
;
A comparative Roentgen-ray diffraction study of several natural
apatites and the apatite-like constituent of bone and tooth
substance
;
_publ_author_name                  'Bale, W F'
_journal_name_full                 'American Journal of Roentgenology'
_journal_coden_ASTM                AJROAM
_journal_volume                    43
_journal_year                      1940
_journal_page_first                735
_journal_page_last                 747
_cell_length_a                     9.37(2)
_cell_length_b                     9.37
_cell_length_c                     6.88(2)
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  120
_cell_volume                       523.1
_cell_formula_units_Z              2
_symmetry_space_group_name_H-M     'P 63/m'
_symmetry_Int_Tables_number        176
_symmetry_cell_setting             hexagonal
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '-y,x-y,z'
  'y-x,-x,z'
  '-x,-y,1/2+z'
  'y,y-x,1/2+z'
  'x-y,x,1/2+z'
  '-x,-y,-z'
  'y,y-x,-z'
  'x-y,x,-z'
  'x,y,1/2-z'
  '-y,x-y,1/2-z'
  'y-x,-x,1/2-z'
loop_
_atom_type_symbol
_atom_type_oxidation_number
  F1-   -1.000
  Ca2+   2.000
  P5+    5.000
  O2-   -2.000
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_symmetry_multiplicity
_atom_site_Wyckoff_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_attached_hydrogens
_atom_site_calc_flag
  F1    F1-    2 a 0. 0. 0.25 1.  0 d
  Ca1   Ca2+   4 f 0.3333 0.6667 0. 1.  0 d
  Ca2   Ca2+   6 h 0.237 -0.015 0.25 1.  0 d
  P1    P5+    6 h 0.416 0.361 0.25 1.  0 d
  O1    O2-    6 h 0.333 0.5 0.25 1.  0 d
  O2    O2-    6 h 0.6 0.467 0.25 1.  0 d
  O3    O2-   12 i 0.333 0.25 0.062 1.  0 d