data_global
_chemical_name_mineral 'Mieite-(Y)'
loop_
_publ_author_name
'Balko V P'
'Bakakin V V'
_journal_name_full 'Zhurnal Strukturnoi Khimii'
_journal_volume 16 
_journal_year 1975
_journal_page_first 837
_journal_page_last 842
_publ_section_title
;
 Crystal-structure of natural yttrium and rare-earth fluorotitano-silicate
 (Y,Ree)4(F,OH)6TiO[SiO4]2 (yftisite)
;
_database_code_amcsd 0015895
_chemical_formula_sum 'Y4 Ti Si2 O9 F6'
_cell_length_a 14.949
_cell_length_b 10.626
_cell_length_c 7.043
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1118.767
_exptl_crystal_density_diffrn      4.261
_symmetry_space_group_name_H-M 'C m c m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,1/2+z'
  '1/2+x,1/2-y,1/2+z'
  '-x,y,1/2-z'
  '1/2-x,1/2+y,1/2-z'
  '-x,y,z'
  '1/2-x,1/2+y,z'
  'x,-y,-z'
  '1/2+x,1/2-y,-z'
  'x,y,1/2-z'
  '1/2+x,1/2+y,1/2-z'
  '-x,-y,1/2+z'
  '1/2-x,1/2-y,1/2+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_U_iso_or_equiv
Y1   0.14640   0.43680   0.25000   0.01520
Y2   0.13130   0.79330   0.25000   0.01267
Ti   0.00000   0.00000   0.50000   0.01646
Si   0.15590   0.12000   0.25000   0.00253
O1   0.09540   0.12620   0.05530   0.01267
O2   0.29520   0.48540   0.25000   0.00887
O3   0.22010   0.24870   0.25000   0.00887
O4   0.50000   0.43370   0.25000   0.00887
F1   0.35820   0.11810   0.06100   0.01140
F2   0.00000   0.42040   0.25000   0.05319
F3   0.00000   0.69870   0.25000   0.02406