data_global
_chemical_name_mineral 'Mottanaite-(Ce)'
loop_
_publ_author_name
'Della Ventura G'
'Bonazzi P'
'Oberti R'
'Ottolini L'
_journal_name_full 'American Mineralogist'
_journal_volume 87 
_journal_year 2002
_journal_page_first 739
_journal_page_last 744
_publ_section_title
;
 Ciprianiite and mottanaite-(Ce), two new minerals
 of the hellandite group from Latium (Italy)
;
_database_code_amcsd 0002818
_chemical_formula_sum 'B4 Si4 Be1.18 Li.026 Al.497 Fe.384 Ti.07 Mg.035 Ca4.372 La.456 Ce.772 Y.006 Pr.068 Nd.142 Sm.008 Eu.002 Gd.006 Th.152 U.016 O22.544 F.49 H.544'
_cell_length_a 19.032
_cell_length_b 4.746
_cell_length_c 10.248
_cell_angle_alpha 90
_cell_angle_beta 110.97
_cell_angle_gamma 90
_cell_volume 864.351
_exptl_crystal_density_diffrn      3.823
_symmetry_space_group_name_H-M 'P 1 2/a 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2-x,y,-z'
  '1/2+x,-y,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
B1   0.17320   0.53160   0.45130   1.00000   0.00709
B2   0.25420   0.46700   0.13310   1.00000   0.00557
Si1   0.10390   0.48340   0.65080   1.00000   0.00633
Si2   0.11260   0.49920   0.16120   1.00000   0.00697
BeT   0.03930   0.54240   0.86680   0.59000   0.01165
LiT   0.03930   0.54240   0.86680   0.01300   0.01165
AlM1   0.00000   0.00000   0.00000   0.49700   0.00937
FeM1   0.00000   0.00000   0.00000   0.38400   0.00937
TiM1   0.00000   0.00000   0.00000   0.07000   0.00937
MgM1   0.00000   0.00000   0.00000   0.03500   0.00937
CaM2   0.04240   0.01490   0.36120   0.18600   0.00709
LaM2   0.04240   0.01490   0.36120   0.22800   0.00709
CeM2   0.04240   0.01490   0.36120   0.38600   0.00709
YM2   0.04240   0.01490   0.36120   0.00300   0.00709
PrM2   0.04240   0.01490   0.36120   0.03400   0.00709
NdM2   0.04240   0.01490   0.36120   0.07100   0.00709
SmM2   0.04240   0.01490   0.36120   0.00400   0.00709
EuM2   0.04240   0.01490   0.36120   0.00100   0.00709
GdM2   0.04240   0.01490   0.36120   0.00300   0.00709
ThM2   0.04240   0.01490   0.36120   0.07600   0.00709
UM2   0.04240   0.01490   0.36120   0.00800   0.00709
CaM3   0.24710   0.00320   0.66140   1.00000   0.00912
CaM4   0.15700  -0.02850   0.93140   1.00000   0.01077
O1   0.04430   0.24100   0.56740   1.00000   0.00925
O2   0.17780   0.31910   0.75460   1.00000   0.00887
O3   0.06970  -0.31000   0.74100   1.00000   0.01925
O4   0.13200  -0.32960   0.54160   1.00000   0.00950
F5   0.03670   0.19670   0.87160   0.24500   0.01418
O-H5   0.03670   0.19670   0.87160   0.27200   0.01418
O6   0.24660  -0.24160   0.85820   1.00000   0.01229
O7   0.16660   0.23320   0.44430   1.00000   0.00747
O8   0.13240   0.67560   0.30710   1.00000   0.01330
O9   0.18610   0.32590   0.15840   1.00000   0.01077
O10   0.08520   0.72370   0.03690   1.00000   0.01963
O11   0.05060   0.26080   0.15660   1.00000   0.02140
O12   0.25000   0.33690   0.00000   1.00000   0.00747
O13   0.25000   0.64950   0.50000   1.00000   0.00785