data_global
_amcsd_formula_title 'Ca(Ti,Zr)OGeO4'
loop_
_publ_author_name
'Ellemann-Olesen R'
'Malcherek T'
_journal_name_full 'American Mineralogist'
_journal_volume 90 
_journal_year 2005
_journal_page_first 687
_journal_page_last 694
_publ_section_title
;
 Temperature and composition dependence of structural phase transitions in
 Ca(TixZr1-x)OGeO4.
 Sample: Ti50, hi-T titanite structure
;
_database_code_amcsd 0003764
_chemical_formula_sum 'Ca Ti.507 Zr.492 Ge O5'
_cell_length_a 7.25821
_cell_length_b 9.01791
_cell_length_c 6.72200
_cell_angle_alpha 90
_cell_angle_beta 113.351
_cell_angle_gamma 90
_cell_volume 403.944
_exptl_crystal_density_diffrn      4.306
_symmetry_space_group_name_H-M 'A 1 2/a 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2+y,1/2+z'
  '1/2+x,-y,z'
  '1/2+x,1/2-y,1/2+z'
  '1/2-x,y,-z'
  '1/2-x,1/2+y,1/2-z'
  '-x,-y,-z'
  '-x,1/2-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
Ca   0.25000   0.67120   0.50000   1.00000   0.01400
Ti   0.50000   0.50000   0.00000   0.50700   0.01000
Zr   0.50000   0.50000   0.00000   0.49200   0.01000
Ge   0.75000   0.68160   0.50000   1.00000   0.01300
O1   0.75000   0.56950   0.00000   1.00000   0.00900
O2   0.91940   0.55390   0.67950   1.00000   0.00900
O3   0.39920   0.72040   0.89660   1.00000   0.00900