The compound described by Er2Co12P7 crystallizes in the hexagonal P-6 space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 12-coordinate geometry to six equivalent Co(4) and six equivalent P(3) atoms. In the second Er site, Er(2) is bonded in a 18-coordinate geometry to three equivalent Co(1), three equivalent Co(4), six equivalent Co(2), and six equivalent P(2) atoms. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to one Er(2), one P(1), one P(3), and two equivalent P(2) atoms to form distorted CoErP4 tetrahedra that share corners with two equivalent Co(2)Er2P4 tetrahedra, corners with six equivalent Co(1)ErP4 tetrahedra, edges with two equivalent Co(2)Er2P4 tetrahedra, and faces with two equivalent Co(2)Er2P4 tetrahedra. In the second Co site, Co(2) is bonded to two equivalent Er(2), two equivalent P(2), and two equivalent P(3) atoms to form distorted CoEr2P4 tetrahedra that share corners with two equivalent Co(1)ErP4 tetrahedra, corners with four equivalent Co(2)Er2P4 tetrahedra, edges with two equivalent Co(2)Er2P4 tetrahedra, edges with two equivalent Co(1)ErP4 tetrahedra, faces with two equivalent Co(2)Er2P4 tetrahedra, and faces with two equivalent Co(1)ErP4 tetrahedra. In the third Co site, Co(3) is bonded in a 5-coordinate geometry to one P(2), two equivalent P(1), and two equivalent P(3) atoms. In the fourth Co site, Co(4) is bonded in a 4-coordinate geometry to one Er(2), two equivalent Er(1), two equivalent P(2), and two equivalent P(3) atoms. There are three inequivalent P sites. In the first P site, P(1) is bonded in a 9-coordinate geometry to three equivalent Co(1) and six equivalent Co(3) atoms. In the second P site, P(2) is bonded in a 9-coordinate geometry to two equivalent Er(2), one Co(3), two equivalent Co(1), two equivalent Co(2), and two equivalent Co(4) atoms. In the third P site, P(3) is bonded in a 9-coordinate geometry to two equivalent Er(1), one Co(1), two equivalent Co(2), two equivalent Co(3), and two equivalent Co(4) atoms. is represented by the CIF file [CIF]
data_Er2Co12P7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.911
_cell_length_b   8.911
_cell_length_c   3.565
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.999
_symmetry_Int_Tables_number   1
_cell_volume   245.166
_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
  Er  Er0  1  0.667  0.333  0.500  1.0
  Er  Er1  1  0.333  0.667  0.000  1.0
  Co  Co2  1  0.119  0.846  1.000  1.0
  Co  Co3  1  0.382  0.434  0.500  1.0
  Co  Co4  1  0.727  0.881  1.000  1.0
  Co  Co5  1  0.566  0.948  0.500  1.0
  Co  Co6  1  0.229  0.100  0.500  1.0
  Co  Co7  1  0.871  0.771  0.500  1.0
  Co  Co8  1  0.900  0.129  0.500  1.0
  Co  Co9  1  0.940  0.373  1.000  1.0
  Co  Co10  1  0.627  0.567  0.000  1.0
  Co  Co11  1  0.433  0.060  1.000  1.0
  Co  Co12  1  0.052  0.618  0.500  1.0
  Co  Co13  1  0.154  0.273  1.000  1.0
  P  P14  1  1.000  1.000  1.000  1.0
  P  P15  1  0.596  0.708  0.500  1.0
  P  P16  1  0.704  0.113  1.000  1.0
  P  P17  1  0.887  0.591  0.000  1.0
  P  P18  1  0.409  0.296  0.000  1.0
  P  P19  1  0.292  0.888  0.500  1.0
  P  P20  1  0.112  0.404  0.500  1.0
[/CIF]
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The compound described by Er2Co12P7 crystallizes in the hexagonal P-6 space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 12-coordinate geometry to six equivalent Co(4) and six equivalent P(3) atoms. In the second Er site, Er(2) is bonded in a 18-coordinate geometry to three equivalent Co(1), three equivalent Co(4), six equivalent Co(2), and six equivalent P(2) atoms. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to one Er(2), one P(1), one P(3), and two equivalent P(2) atoms to form distorted CoErP4 tetrahedra that share corners with two equivalent Co(2)Er2P4 tetrahedra, corners with six equivalent Co(1)ErP4 tetrahedra, edges with two equivalent Co(2)Er2P4 tetrahedra, and faces with two equivalent Co(2)Er2P4 tetrahedra. In the second Co site, Co(2) is bonded to two equivalent Er(2), two equivalent P(2), and two equivalent P(3) atoms to form distorted CoEr2P4 tetrahedra that share corners with two equivalent Co(1)ErP4 tetrahedra, corners with four equivalent Co(2)Er2P4 tetrahedra, edges with two equivalent Co(2)Er2P4 tetrahedra, edges with two equivalent Co(1)ErP4 tetrahedra, faces with two equivalent Co(2)Er2P4 tetrahedra, and faces with two equivalent Co(1)ErP4 tetrahedra. In the third Co site, Co(3) is bonded in a 5-coordinate geometry to one P(2), two equivalent P(1), and two equivalent P(3) atoms. In the fourth Co site, Co(4) is bonded in a 4-coordinate geometry to one Er(2), two equivalent Er(1), two equivalent P(2), and two equivalent P(3) atoms. There are three inequivalent P sites. In the first P site, P(1) is bonded in a 9-coordinate geometry to three equivalent Co(1) and six equivalent Co(3) atoms. In the second P site, P(2) is bonded in a 9-coordinate geometry to two equivalent Er(2), one Co(3), two equivalent Co(1), two equivalent Co(2), and two equivalent Co(4) atoms. In the third P site, P(3) is bonded in a 9-coordinate geometry to two equivalent Er(1), one Co(1), two equivalent Co(2), two equivalent Co(3), and two equivalent Co(4) atoms. is represented by the CIF file [CIF]
data_Er2Co12P7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.911
_cell_length_b   8.911
_cell_length_c   3.565
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.999
_symmetry_Int_Tables_number   1
_cell_volume   245.166
_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
  Er  Er0  1  0.667  0.333  0.500  1.0
  Er  Er1  1  0.333  0.667  0.000  1.0
  Co  Co2  1  0.119  0.846  1.000  1.0
  Co  Co3  1  0.382  0.434  0.500  1.0
  Co  Co4  1  0.727  0.881  1.000  1.0
  Co  Co5  1  0.566  0.948  0.500  1.0
  Co  Co6  1  0.229  0.100  0.500  1.0
  Co  Co7  1  0.871  0.771  0.500  1.0
  Co  Co8  1  0.900  0.129  0.500  1.0
  Co  Co9  1  0.940  0.373  1.000  1.0
  Co  Co10  1  0.627  0.567  0.000  1.0
  Co  Co11  1  0.433  0.060  1.000  1.0
  Co  Co12  1  0.052  0.618  0.500  1.0
  Co  Co13  1  0.154  0.273  1.000  1.0
  P  P14  1  1.000  1.000  1.000  1.0
  P  P15  1  0.596  0.708  0.500  1.0
  P  P16  1  0.704  0.113  1.000  1.0
  P  P17  1  0.887  0.591  0.000  1.0
  P  P18  1  0.409  0.296  0.000  1.0
  P  P19  1  0.292  0.888  0.500  1.0
  P  P20  1  0.112  0.404  0.500  1.0
[/CIF]
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