The compound described by MgBe2(CoO2)4 is Aluminum carbonitride-derived structured and crystallizes in the orthorhombic Imm2 space group. Mg(1) is bonded in a 4-coordinate geometry to two equivalent O(2) and two equivalent O(4) atoms. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form BeO4 tetrahedra that share corners with six equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-64°. In the second Be site, Be(2) is bonded to two equivalent O(1) and two equivalent O(4) atoms to form BeO4 tetrahedra that share corners with six equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-64°. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms to form CoO6 octahedra that share corners with three equivalent Be(1)O4 tetrahedra, corners with three equivalent Be(2)O4 tetrahedra, and edges with two equivalent Co(1)O6 octahedra. In the second Co site, Co(2) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(3), and two equivalent O(4) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Be(2), one Co(2), and two equivalent Co(1) atoms. In the second O site, O(2) is bonded to one Mg(1), one Be(1), and two equivalent Co(1) atoms to form distorted OMgBeCo2 tetrahedra that share corners with four equivalent O(3)BeCo3 tetrahedra and edges with two equivalent O(2)MgBeCo2 tetrahedra. In the third O site, O(3) is bonded to one Be(1), one Co(1), and two equivalent Co(2) atoms to form distorted OBeCo3 tetrahedra that share  a cornercorner with one O(3)BeCo3 tetrahedra, corners with four equivalent O(2)MgBeCo2 tetrahedra, and  an edgeedge with one O(3)BeCo3 tetrahedra. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Mg(1), one Be(2), one Co(1), and two equivalent Co(2) atoms. is represented by the CIF card [CIF]
data_MgBe2(CoO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.662
_cell_length_b   6.055
_cell_length_c   5.569
_cell_angle_alpha   62.621
_cell_angle_beta   90.000
_cell_angle_gamma   117.876
_symmetry_Int_Tables_number   1
_cell_volume   144.138
_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
  Mg  Mg0  1  0.221  0.442  0.779  1.0
  Be  Be1  1  0.959  0.919  0.041  1.0
  Be  Be2  1  0.286  0.572  0.214  1.0
  Co  Co3  1  0.628  0.256  0.112  1.0
  Co  Co4  1  0.628  0.256  0.633  1.0
  Co  Co5  1  0.723  0.908  0.546  1.0
  Co  Co6  1  0.185  0.908  0.546  1.0
  O  O7  1  0.923  0.319  0.340  1.0
  O  O8  1  0.838  0.164  0.918  1.0
  O  O9  1  0.880  0.760  0.385  1.0
  O  O10  1  0.396  0.319  0.340  1.0
  O  O11  1  0.379  0.759  0.385  1.0
  O  O12  1  0.326  0.164  0.918  1.0
  O  O13  1  0.880  0.760  0.855  1.0
  O  O14  1  0.379  0.759  0.856  1.0
[/CIF]
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The compound described by MgBe2(CoO2)4 is Aluminum carbonitride-derived structured and crystallizes in the orthorhombic Imm2 space group. Mg(1) is bonded in a 4-coordinate geometry to two equivalent O(2) and two equivalent O(4) atoms. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form BeO4 tetrahedra that share corners with six equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-64°. In the second Be site, Be(2) is bonded to two equivalent O(1) and two equivalent O(4) atoms to form BeO4 tetrahedra that share corners with six equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-64°. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms to form CoO6 octahedra that share corners with three equivalent Be(1)O4 tetrahedra, corners with three equivalent Be(2)O4 tetrahedra, and edges with two equivalent Co(1)O6 octahedra. In the second Co site, Co(2) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(3), and two equivalent O(4) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Be(2), one Co(2), and two equivalent Co(1) atoms. In the second O site, O(2) is bonded to one Mg(1), one Be(1), and two equivalent Co(1) atoms to form distorted OMgBeCo2 tetrahedra that share corners with four equivalent O(3)BeCo3 tetrahedra and edges with two equivalent O(2)MgBeCo2 tetrahedra. In the third O site, O(3) is bonded to one Be(1), one Co(1), and two equivalent Co(2) atoms to form distorted OBeCo3 tetrahedra that share  a cornercorner with one O(3)BeCo3 tetrahedra, corners with four equivalent O(2)MgBeCo2 tetrahedra, and  an edgeedge with one O(3)BeCo3 tetrahedra. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Mg(1), one Be(2), one Co(1), and two equivalent Co(2) atoms. is represented by the CIF card [CIF]
data_MgBe2(CoO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.662
_cell_length_b   6.055
_cell_length_c   5.569
_cell_angle_alpha   62.621
_cell_angle_beta   90.000
_cell_angle_gamma   117.876
_symmetry_Int_Tables_number   1
_cell_volume   144.138
_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
  Mg  Mg0  1  0.221  0.442  0.779  1.0
  Be  Be1  1  0.959  0.919  0.041  1.0
  Be  Be2  1  0.286  0.572  0.214  1.0
  Co  Co3  1  0.628  0.256  0.112  1.0
  Co  Co4  1  0.628  0.256  0.633  1.0
  Co  Co5  1  0.723  0.908  0.546  1.0
  Co  Co6  1  0.185  0.908  0.546  1.0
  O  O7  1  0.923  0.319  0.340  1.0
  O  O8  1  0.838  0.164  0.918  1.0
  O  O9  1  0.880  0.760  0.385  1.0
  O  O10  1  0.396  0.319  0.340  1.0
  O  O11  1  0.379  0.759  0.385  1.0
  O  O12  1  0.326  0.164  0.918  1.0
  O  O13  1  0.880  0.760  0.855  1.0
  O  O14  1  0.379  0.759  0.856  1.0
[/CIF]
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