The crystal structure described by Sr2MgCoO4 crystallizes in the triclinic P1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(4), and two equivalent O(2) atoms. In the second Sr site, Sr(2) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), and two equivalent O(1) atoms. Mg(1) is bonded in a 4-coordinate geometry to one O(2), one O(3), and two equivalent O(4) atoms. Co(1) is bonded in a 3-coordinate geometry to one O(1), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), two equivalent Sr(2), and one Co(1) atom to form distorted OSr3Co trigonal pyramids that share corners with two equivalent O(4)Sr2Mg2Co trigonal bipyramids, corners with two equivalent O(1)Sr3Co trigonal pyramids, and  an edgeedge with one O(4)Sr2Mg2Co trigonal bipyramid. In the second O site, O(2) is bonded in a distorted see-saw-like geometry to one Sr(2), two equivalent Sr(1), and one Mg(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Sr(1), one Sr(2), one Mg(1), and one Co(1) atom. In the fourth O site, O(4) is bonded to one Sr(1), one Sr(2), two equivalent Mg(1), and one Co(1) atom to form distorted OSr2Mg2Co trigonal bipyramids that share corners with two equivalent O(4)Sr2Mg2Co trigonal bipyramids, corners with two equivalent O(1)Sr3Co trigonal pyramids, and  an edgeedge with one O(1)Sr3Co trigonal pyramid. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2MgCoO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.853
_cell_length_b   5.131
_cell_length_c   8.192
_cell_angle_alpha   116.744
_cell_angle_beta   109.531
_cell_angle_gamma   84.866
_symmetry_Int_Tables_number   1
_cell_volume   135.954
_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
  Sr  Sr0  1  0.579  0.469  0.316  1.0
  Sr  Sr1  1  0.370  0.476  0.730  1.0
  Mg  Mg2  1  0.994  0.901  0.125  1.0
  Co  Co3  1  0.019  0.085  0.877  1.0
  O  O4  1  0.800  0.746  0.672  1.0
  O  O5  1  0.151  0.229  0.381  1.0
  O  O6  1  0.979  0.472  0.018  1.0
  O  O7  1  0.429  0.956  0.038  1.0
[/CIF]
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The crystal structure described by Sr2MgCoO4 crystallizes in the triclinic P1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(4), and two equivalent O(2) atoms. In the second Sr site, Sr(2) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), and two equivalent O(1) atoms. Mg(1) is bonded in a 4-coordinate geometry to one O(2), one O(3), and two equivalent O(4) atoms. Co(1) is bonded in a 3-coordinate geometry to one O(1), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), two equivalent Sr(2), and one Co(1) atom to form distorted OSr3Co trigonal pyramids that share corners with two equivalent O(4)Sr2Mg2Co trigonal bipyramids, corners with two equivalent O(1)Sr3Co trigonal pyramids, and  an edgeedge with one O(4)Sr2Mg2Co trigonal bipyramid. In the second O site, O(2) is bonded in a distorted see-saw-like geometry to one Sr(2), two equivalent Sr(1), and one Mg(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Sr(1), one Sr(2), one Mg(1), and one Co(1) atom. In the fourth O site, O(4) is bonded to one Sr(1), one Sr(2), two equivalent Mg(1), and one Co(1) atom to form distorted OSr2Mg2Co trigonal bipyramids that share corners with two equivalent O(4)Sr2Mg2Co trigonal bipyramids, corners with two equivalent O(1)Sr3Co trigonal pyramids, and  an edgeedge with one O(1)Sr3Co trigonal pyramid. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2MgCoO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.853
_cell_length_b   5.131
_cell_length_c   8.192
_cell_angle_alpha   116.744
_cell_angle_beta   109.531
_cell_angle_gamma   84.866
_symmetry_Int_Tables_number   1
_cell_volume   135.954
_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
  Sr  Sr0  1  0.579  0.469  0.316  1.0
  Sr  Sr1  1  0.370  0.476  0.730  1.0
  Mg  Mg2  1  0.994  0.901  0.125  1.0
  Co  Co3  1  0.019  0.085  0.877  1.0
  O  O4  1  0.800  0.746  0.672  1.0
  O  O5  1  0.151  0.229  0.381  1.0
  O  O6  1  0.979  0.472  0.018  1.0
  O  O7  1  0.429  0.956  0.038  1.0
[/CIF]
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