data_[Ca2V2Si4O14]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ca  1.0000  1.8000  1.1400
  V  1.6300  1.3500  0.7775
  Si  1.9000  1.1000  0.5400
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2]
_cell_length_a [6.7198]
_cell_length_b [8.4070]
_cell_length_c [4.6190]
_cell_angle_alpha [90.0000]
_cell_angle_beta [99.9578]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [5]
_chemical_formula_structural [CaVSi2O7]
_chemical_formula_sum '[Ca2 V2 Si4 O14]'
_cell_volume [257.0087]
_cell_formula_units_Z [2]
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
[
  Ca  Ca0  2  0.0000  0.2866  0.5000  1.0
  V  V1  2  0.0000  0.6791  0.5000  1.0
  Si  Si2  4  0.2154  0.0072  0.9221  1.0
  O  O3  4  0.1242  0.4989  0.7719  1.0
  O  O4  4  0.1767  0.8409  0.7387  1.0
  O  O5  4  0.2164  0.6492  0.2926  1.0
  O  O6  2  0.0000  0.0814  0.0000  1.0
]