The material described by Ca8Co3Zn(Si2O7)4 crystallizes in the tetragonal P-4 space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 8-coordinate geometry to one O(1); one O(3,5); one O(4); two equivalent O(2); and three equivalent O(6,7) atoms. In the second Ca site, Ca(2) is bonded in a 8-coordinate geometry to one O(1); one O(4); three equivalent O(3,5); and three equivalent O(6,7) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to four equivalent O(3,5) atoms to form CoO4 tetrahedra that share corners with four equivalent Si(2)O4 tetrahedra. In the second Co site, Co(2) is bonded to two equivalent O(3,5) and two equivalent O(4) atoms to form CoO4 tetrahedra that share corners with two equivalent Si(1)O4 tetrahedra and corners with two equivalent Si(2)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. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1); one O(2); one O(4); and one O(6,7) atom to form SiO4 tetrahedra that share  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Zn(1)O4 tetrahedra, and  a cornercorner with one Si(2)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(1); one O(6,7); and two equivalent O(3,5) atoms to form SiO4 tetrahedra that share  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(2)O4 tetrahedra, and  a cornercorner with one Si(1)O4 tetrahedra. There are five inequivalent O sites. In the first O site, O(6,7) is bonded in a 4-coordinate geometry to one Ca(2), two equivalent Ca(1), and one Si(1) atom. In the second O site, O(1) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Si(1), and one Si(2) atom. In the third 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 fourth O site, O(3,5) is bonded in a 4-coordinate geometry to two equivalent Ca(2), one Co(1), and one Si(2) atom. In the fifth O site, O(4) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Co(2), and one Si(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ca8ZnCo3(Si2O7)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.192
_cell_length_b   11.192
_cell_length_c   5.062
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   634.133
_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  0.250  0.581  0.504  1.0
  Ca  Ca1  1  0.750  0.081  0.504  1.0
  Ca  Ca2  1  0.419  0.250  0.496  1.0
  Ca  Ca3  1  0.919  0.750  0.496  1.0
  Ca  Ca4  1  0.750  0.419  0.504  1.0
  Ca  Ca5  1  0.250  0.919  0.504  1.0
  Ca  Ca6  1  0.581  0.750  0.496  1.0
  Ca  Ca7  1  0.081  0.250  0.496  1.0
  Zn  Zn8  1  0.500  0.500  0.000  1.0
  Co  Co9  1  0.000  0.000  0.000  1.0
  Co  Co10  1  0.000  0.500  1.000  1.0
  Co  Co11  1  0.500  0.000  0.000  1.0
  Si  Si12  1  0.250  0.391  0.938  1.0
  Si  Si13  1  0.750  0.891  0.937  1.0
  Si  Si14  1  0.609  0.250  0.062  1.0
  Si  Si15  1  0.109  0.750  0.063  1.0
  Si  Si16  1  0.750  0.609  0.938  1.0
  Si  Si17  1  0.250  0.109  0.937  1.0
  Si  Si18  1  0.391  0.750  0.062  1.0
  Si  Si19  1  0.891  0.250  0.063  1.0
  O  O20  1  0.250  0.750  0.178  1.0
  O  O21  1  0.750  0.250  0.178  1.0
  O  O22  1  0.750  0.750  0.822  1.0
  O  O23  1  0.250  0.250  0.822  1.0
  O  O24  1  0.366  0.449  0.782  1.0
  O  O25  1  0.865  0.948  0.781  1.0
  O  O26  1  0.551  0.135  0.219  1.0
  O  O27  1  0.052  0.635  0.219  1.0
  O  O28  1  0.634  0.551  0.782  1.0
  O  O29  1  0.135  0.052  0.781  1.0
  O  O30  1  0.449  0.865  0.219  1.0
  O  O31  1  0.948  0.365  0.219  1.0
  O  O32  1  0.449  0.634  0.218  1.0
  O  O33  1  0.948  0.135  0.219  1.0
  O  O34  1  0.865  0.551  0.781  1.0
  O  O35  1  0.365  0.052  0.781  1.0
  O  O36  1  0.551  0.366  0.218  1.0
  O  O37  1  0.052  0.865  0.219  1.0
  O  O38  1  0.135  0.449  0.781  1.0
  O  O39  1  0.635  0.948  0.781  1.0
  O  O40  1  0.250  0.393  0.256  1.0
  O  O41  1  0.750  0.893  0.256  1.0
  O  O42  1  0.607  0.250  0.744  1.0
  O  O43  1  0.107  0.750  0.744  1.0
  O  O44  1  0.750  0.607  0.256  1.0
  O  O45  1  0.250  0.107  0.256  1.0
  O  O46  1  0.393  0.750  0.744  1.0
  O  O47  1  0.893  0.250  0.744  1.0
[/CIF]
.
The material described by Ca8Co3Zn(Si2O7)4 crystallizes in the tetragonal P-4 space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 8-coordinate geometry to one O(1); one O(3,5); one O(4); two equivalent O(2); and three equivalent O(6,7) atoms. In the second Ca site, Ca(2) is bonded in a 8-coordinate geometry to one O(1); one O(4); three equivalent O(3,5); and three equivalent O(6,7) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to four equivalent O(3,5) atoms to form CoO4 tetrahedra that share corners with four equivalent Si(2)O4 tetrahedra. In the second Co site, Co(2) is bonded to two equivalent O(3,5) and two equivalent O(4) atoms to form CoO4 tetrahedra that share corners with two equivalent Si(1)O4 tetrahedra and corners with two equivalent Si(2)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. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1); one O(2); one O(4); and one O(6,7) atom to form SiO4 tetrahedra that share  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Zn(1)O4 tetrahedra, and  a cornercorner with one Si(2)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(1); one O(6,7); and two equivalent O(3,5) atoms to form SiO4 tetrahedra that share  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(2)O4 tetrahedra, and  a cornercorner with one Si(1)O4 tetrahedra. There are five inequivalent O sites. In the first O site, O(6,7) is bonded in a 4-coordinate geometry to one Ca(2), two equivalent Ca(1), and one Si(1) atom. In the second O site, O(1) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Si(1), and one Si(2) atom. In the third 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 fourth O site, O(3,5) is bonded in a 4-coordinate geometry to two equivalent Ca(2), one Co(1), and one Si(2) atom. In the fifth O site, O(4) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Co(2), and one Si(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ca8ZnCo3(Si2O7)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.192
_cell_length_b   11.192
_cell_length_c   5.062
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   634.133
_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  0.250  0.581  0.504  1.0
  Ca  Ca1  1  0.750  0.081  0.504  1.0
  Ca  Ca2  1  0.419  0.250  0.496  1.0
  Ca  Ca3  1  0.919  0.750  0.496  1.0
  Ca  Ca4  1  0.750  0.419  0.504  1.0
  Ca  Ca5  1  0.250  0.919  0.504  1.0
  Ca  Ca6  1  0.581  0.750  0.496  1.0
  Ca  Ca7  1  0.081  0.250  0.496  1.0
  Zn  Zn8  1  0.500  0.500  0.000  1.0
  Co  Co9  1  0.000  0.000  0.000  1.0
  Co  Co10  1  0.000  0.500  1.000  1.0
  Co  Co11  1  0.500  0.000  0.000  1.0
  Si  Si12  1  0.250  0.391  0.938  1.0
  Si  Si13  1  0.750  0.891  0.937  1.0
  Si  Si14  1  0.609  0.250  0.062  1.0
  Si  Si15  1  0.109  0.750  0.063  1.0
  Si  Si16  1  0.750  0.609  0.938  1.0
  Si  Si17  1  0.250  0.109  0.937  1.0
  Si  Si18  1  0.391  0.750  0.062  1.0
  Si  Si19  1  0.891  0.250  0.063  1.0
  O  O20  1  0.250  0.750  0.178  1.0
  O  O21  1  0.750  0.250  0.178  1.0
  O  O22  1  0.750  0.750  0.822  1.0
  O  O23  1  0.250  0.250  0.822  1.0
  O  O24  1  0.366  0.449  0.782  1.0
  O  O25  1  0.865  0.948  0.781  1.0
  O  O26  1  0.551  0.135  0.219  1.0
  O  O27  1  0.052  0.635  0.219  1.0
  O  O28  1  0.634  0.551  0.782  1.0
  O  O29  1  0.135  0.052  0.781  1.0
  O  O30  1  0.449  0.865  0.219  1.0
  O  O31  1  0.948  0.365  0.219  1.0
  O  O32  1  0.449  0.634  0.218  1.0
  O  O33  1  0.948  0.135  0.219  1.0
  O  O34  1  0.865  0.551  0.781  1.0
  O  O35  1  0.365  0.052  0.781  1.0
  O  O36  1  0.551  0.366  0.218  1.0
  O  O37  1  0.052  0.865  0.219  1.0
  O  O38  1  0.135  0.449  0.781  1.0
  O  O39  1  0.635  0.948  0.781  1.0
  O  O40  1  0.250  0.393  0.256  1.0
  O  O41  1  0.750  0.893  0.256  1.0
  O  O42  1  0.607  0.250  0.744  1.0
  O  O43  1  0.107  0.750  0.744  1.0
  O  O44  1  0.750  0.607  0.256  1.0
  O  O45  1  0.250  0.107  0.256  1.0
  O  O46  1  0.393  0.750  0.744  1.0
  O  O47  1  0.893  0.250  0.744  1.0
[/CIF]
.