data_global
_chemical_name_mineral 'Fluorbritholite-(Ce)'
loop_
_publ_author_name
'Oberti R'
'Ottolini L'
'Della Ventura G'
'Parodi G C'
_journal_name_full 'American Mineralogist'
_journal_volume 86 
_journal_year 2001
_journal_page_first 1066
_journal_page_last 1075
_publ_section_title
;
 On the symmetry and crystal chemistry of britholite:
 New structural and microanalytical data
 Sample: CAPR in volcanic ejectum from Capranica, Latium, Italy
;
_database_code_amcsd 0002669
_chemical_formula_sum '(Si2.79 B.09 P.12) (Ca2.45 Y.1 La.55 Ce1.05 Pr.1 Nd.3 Sm.05 Th.35 U.05) O12.12 (F.88 H.12)'
_cell_length_a 9.547
_cell_length_b 9.547
_cell_length_c 6.991
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 551.828
_exptl_crystal_density_diffrn      4.709
_symmetry_space_group_name_H-M 'P 63'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x-y,x,1/2+z'
  '-y,x-y,z'
  '-x,-y,1/2+z'
  '-x+y,-x,z'
  'y,-x+y,1/2+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
Si1   0.39900   0.37180   0.25130   0.93000   0.00861
B1   0.39900   0.37180   0.25130   0.03000   0.00861
P1   0.39900   0.37180   0.25130   0.04000   0.00861
Ca1   0.33333   0.66667  -0.00480   0.49000   0.01077
Y1   0.33333   0.66667  -0.00480   0.02000   0.01077
La1   0.33333   0.66667  -0.00480   0.11000   0.01077
Ce1   0.33333   0.66667  -0.00480   0.21000   0.01077
Pr1   0.33333   0.66667  -0.00480   0.02000   0.01077
Nd1   0.33333   0.66667  -0.00480   0.06000   0.01077
Sm1   0.33333   0.66667  -0.00480   0.01000   0.01077
Th1   0.33333   0.66667  -0.00480   0.07000   0.01077
U1   0.33333   0.66667  -0.00480   0.01000   0.01077
Ca1a   0.66667   0.33333   0.00010   0.49000   0.01039
Y1a   0.66667   0.33333   0.00010   0.02000   0.01039
La1a   0.66667   0.33333   0.00010   0.11000   0.01039
Ce1a   0.66667   0.33333   0.00010   0.21000   0.01039
Pr1a   0.66667   0.33333   0.00010   0.02000   0.01039
Nd1a   0.66667   0.33333   0.00010   0.06000   0.01039
Sm1a   0.66667   0.33333   0.00010   0.01000   0.01039
Th1a   0.66667   0.33333   0.00010   0.07000   0.01039
U1a   0.66667   0.33333   0.00010   0.01000   0.01039
Ca2   0.23780  -0.01160   0.25000   0.49000   0.01102
Y2   0.23780  -0.01160   0.25000   0.02000   0.01102
La2   0.23780  -0.01160   0.25000   0.11000   0.01102
Ce2   0.23780  -0.01160   0.25000   0.21000   0.01102
Pr2   0.23780  -0.01160   0.25000   0.02000   0.01102
Nd2   0.23780  -0.01160   0.25000   0.06000   0.01102
Sm2   0.23780  -0.01160   0.25000   0.01000   0.01102
Th2   0.23780  -0.01160   0.25000   0.07000   0.01102
U2   0.23780  -0.01160   0.25000   0.01000   0.01102
O1   0.32290   0.48860   0.25320   1.00000   0.01836
O2   0.59400   0.46950   0.25690   1.00000   0.02254
O3   0.31680   0.24310   0.42180   1.00000   0.02672
O3a   0.35800   0.26040   0.05950   1.00000   0.01710
O-H4   0.00000   0.00000   0.23590   0.12000   0.06814
F4   0.00000   0.00000   0.23590   0.88000   0.06814