The compound described by Ag7Ca2 crystallizes in the orthorhombic Cmcm space group. Ca(1) is bonded in a 14-coordinate geometry to two equivalent Ag(1), four equivalent Ag(2), and eight equivalent Ag(3) atoms. There are three inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to four equivalent Ca(1), four equivalent Ag(2), and four equivalent Ag(3) atoms to form a mixture of edge, face, and corner-sharing AgCa4Ag8 cuboctahedra. In the second Ag site, Ag(2) is bonded to four equivalent Ca(1), two equivalent Ag(1), two equivalent Ag(2), and four equivalent Ag(3) atoms to form a mixture of edge, face, and corner-sharing AgCa4Ag8 cuboctahedra. In the third Ag site, Ag(3) is bonded in a 12-coordinate geometry to four equivalent Ca(1), one Ag(1), two equivalent Ag(2), and five equivalent Ag(3) atoms. is represented by the CIF file [CIF]
data_Ca2Ag7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.484
_cell_length_b   5.484
_cell_length_c   14.090
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.428
_symmetry_Int_Tables_number   1
_cell_volume   369.009
_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  1  0.323  0.323  0.114  1.0
  Ca  Ca1  1  0.677  0.677  0.614  1.0
  Ca  Ca2  1  0.323  0.323  0.386  1.0
  Ca  Ca3  1  0.677  0.677  0.886  1.0
  Ag  Ag4  1  0.829  0.829  0.250  1.0
  Ag  Ag5  1  0.171  0.171  0.750  1.0
  Ag  Ag6  1  0.329  0.827  0.250  1.0
  Ag  Ag7  1  0.671  0.173  0.750  1.0
  Ag  Ag8  1  0.827  0.329  0.250  1.0
  Ag  Ag9  1  0.173  0.671  0.750  1.0
  Ag  Ag10  1  0.665  0.994  0.076  1.0
  Ag  Ag11  1  0.335  0.006  0.576  1.0
  Ag  Ag12  1  0.994  0.665  0.424  1.0
  Ag  Ag13  1  0.006  0.335  0.924  1.0
  Ag  Ag14  1  0.335  0.006  0.924  1.0
  Ag  Ag15  1  0.665  0.994  0.424  1.0
  Ag  Ag16  1  0.006  0.335  0.576  1.0
  Ag  Ag17  1  0.994  0.665  0.076  1.0
[/CIF]
.
The compound described by Ag7Ca2 crystallizes in the orthorhombic Cmcm space group. Ca(1) is bonded in a 14-coordinate geometry to two equivalent Ag(1), four equivalent Ag(2), and eight equivalent Ag(3) atoms. There are three inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to four equivalent Ca(1), four equivalent Ag(2), and four equivalent Ag(3) atoms to form a mixture of edge, face, and corner-sharing AgCa4Ag8 cuboctahedra. In the second Ag site, Ag(2) is bonded to four equivalent Ca(1), two equivalent Ag(1), two equivalent Ag(2), and four equivalent Ag(3) atoms to form a mixture of edge, face, and corner-sharing AgCa4Ag8 cuboctahedra. In the third Ag site, Ag(3) is bonded in a 12-coordinate geometry to four equivalent Ca(1), one Ag(1), two equivalent Ag(2), and five equivalent Ag(3) atoms. is represented by the CIF file [CIF]
data_Ca2Ag7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.484
_cell_length_b   5.484
_cell_length_c   14.090
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.428
_symmetry_Int_Tables_number   1
_cell_volume   369.009
_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  1  0.323  0.323  0.114  1.0
  Ca  Ca1  1  0.677  0.677  0.614  1.0
  Ca  Ca2  1  0.323  0.323  0.386  1.0
  Ca  Ca3  1  0.677  0.677  0.886  1.0
  Ag  Ag4  1  0.829  0.829  0.250  1.0
  Ag  Ag5  1  0.171  0.171  0.750  1.0
  Ag  Ag6  1  0.329  0.827  0.250  1.0
  Ag  Ag7  1  0.671  0.173  0.750  1.0
  Ag  Ag8  1  0.827  0.329  0.250  1.0
  Ag  Ag9  1  0.173  0.671  0.750  1.0
  Ag  Ag10  1  0.665  0.994  0.076  1.0
  Ag  Ag11  1  0.335  0.006  0.576  1.0
  Ag  Ag12  1  0.994  0.665  0.424  1.0
  Ag  Ag13  1  0.006  0.335  0.924  1.0
  Ag  Ag14  1  0.335  0.006  0.924  1.0
  Ag  Ag15  1  0.665  0.994  0.424  1.0
  Ag  Ag16  1  0.006  0.335  0.576  1.0
  Ag  Ag17  1  0.994  0.665  0.076  1.0
[/CIF]
.