The material structure described by Ca4CoZn(Si2O7)2 crystallizes in the tetragonal P-4 space group. Ca(1) is bonded in a 8-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), and three equivalent O(4) atoms. Co(1) is bonded to four equivalent O(3) atoms to form CoO4 tetrahedra that share corners with four equivalent Si(1)O4 tetrahedra. Zn(1) is bonded to four equivalent O(2) atoms to form ZnO4 tetrahedra that share corners with four equivalent Si(1)O4 tetrahedra. Si(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SiO4 tetrahedra that share  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Zn(1)O4 tetrahedra, and  a cornercorner with one Si(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted tetrahedral geometry to two equivalent Ca(1) and two equivalent Si(1) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Ca(1), one Zn(1), and one Si(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Ca(1), one Co(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to three equivalent Ca(1) and one Si(1) atom. is represented by the CIF file [CIF]
data_Ca4ZnCo(Si2O7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.063
_cell_length_b   7.909
_cell_length_c   7.908
_cell_angle_alpha   89.998
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   316.662
_cell_formula_units_Z   1
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  1  0.497  0.670  0.169  1.0
  Ca  Ca1  1  0.503  0.831  0.670  1.0
  Ca  Ca2  1  0.497  0.330  0.831  1.0
  Ca  Ca3  1  0.503  0.169  0.330  1.0
  Co  Co4  1  1.000  1.000  0.000  1.0
  O  O5  1  0.815  0.500  0.000  1.0
  O  O6  1  0.185  0.000  0.500  1.0
  O  O7  1  0.221  0.686  0.418  1.0
  O  O8  1  0.221  0.314  0.582  1.0
  O  O9  1  0.779  0.418  0.314  1.0
  O  O10  1  0.779  0.582  0.686  1.0
  O  O11  1  0.779  0.814  0.917  1.0
  O  O12  1  0.779  0.186  0.083  1.0
  O  O13  1  0.221  0.083  0.814  1.0
  O  O14  1  0.221  0.917  0.186  1.0
  O  O15  1  0.747  0.859  0.358  1.0
  O  O16  1  0.253  0.642  0.859  1.0
  O  O17  1  0.747  0.141  0.642  1.0
  O  O18  1  0.253  0.358  0.141  1.0
  Si  Si19  1  0.066  0.859  0.359  1.0
  Si  Si20  1  0.934  0.641  0.859  1.0
  Si  Si21  1  0.066  0.141  0.641  1.0
  Si  Si22  1  0.934  0.359  0.141  1.0
  Zn  Zn23  1  0.000  0.500  0.500  1.0
[/CIF]
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The material structure described by Ca4CoZn(Si2O7)2 crystallizes in the tetragonal P-4 space group. Ca(1) is bonded in a 8-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), and three equivalent O(4) atoms. Co(1) is bonded to four equivalent O(3) atoms to form CoO4 tetrahedra that share corners with four equivalent Si(1)O4 tetrahedra. Zn(1) is bonded to four equivalent O(2) atoms to form ZnO4 tetrahedra that share corners with four equivalent Si(1)O4 tetrahedra. Si(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SiO4 tetrahedra that share  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Zn(1)O4 tetrahedra, and  a cornercorner with one Si(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted tetrahedral geometry to two equivalent Ca(1) and two equivalent Si(1) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Ca(1), one Zn(1), and one Si(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Ca(1), one Co(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to three equivalent Ca(1) and one Si(1) atom. is represented by the CIF file [CIF]
data_Ca4ZnCo(Si2O7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.063
_cell_length_b   7.909
_cell_length_c   7.908
_cell_angle_alpha   89.998
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   316.662
_cell_formula_units_Z   1
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  1  0.497  0.670  0.169  1.0
  Ca  Ca1  1  0.503  0.831  0.670  1.0
  Ca  Ca2  1  0.497  0.330  0.831  1.0
  Ca  Ca3  1  0.503  0.169  0.330  1.0
  Co  Co4  1  1.000  1.000  0.000  1.0
  O  O5  1  0.815  0.500  0.000  1.0
  O  O6  1  0.185  0.000  0.500  1.0
  O  O7  1  0.221  0.686  0.418  1.0
  O  O8  1  0.221  0.314  0.582  1.0
  O  O9  1  0.779  0.418  0.314  1.0
  O  O10  1  0.779  0.582  0.686  1.0
  O  O11  1  0.779  0.814  0.917  1.0
  O  O12  1  0.779  0.186  0.083  1.0
  O  O13  1  0.221  0.083  0.814  1.0
  O  O14  1  0.221  0.917  0.186  1.0
  O  O15  1  0.747  0.859  0.358  1.0
  O  O16  1  0.253  0.642  0.859  1.0
  O  O17  1  0.747  0.141  0.642  1.0
  O  O18  1  0.253  0.358  0.141  1.0
  Si  Si19  1  0.066  0.859  0.359  1.0
  Si  Si20  1  0.934  0.641  0.859  1.0
  Si  Si21  1  0.066  0.141  0.641  1.0
  Si  Si22  1  0.934  0.359  0.141  1.0
  Zn  Zn23  1  0.000  0.500  0.500  1.0
[/CIF]
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