The material described by SrMg6C crystallizes in the orthorhombic Amm2 space group. Sr(1) is bonded in a 6-coordinate geometry to two equivalent Mg(3), four equivalent Mg(2), and four equivalent Mg(4) atoms. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a single-bond geometry to two equivalent Mg(3), two equivalent Mg(4), and one C(1) atom. In the second Mg site, Mg(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Sr(1), one Mg(4), and two equivalent C(1) atoms. In the third Mg site, Mg(3) is bonded in a 8-coordinate geometry to two equivalent Sr(1), two equivalent Mg(4), and four equivalent Mg(1) atoms. In the fourth Mg site, Mg(4) is bonded in a 12-coordinate geometry to four equivalent Sr(1), two equivalent Mg(2), two equivalent Mg(3), and four equivalent Mg(1) atoms. C(1) is bonded in a 6-coordinate geometry to two equivalent Mg(1) and four equivalent Mg(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrMg6C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.741
_cell_length_b   7.741
_cell_length_c   4.527
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   135.981
_symmetry_Int_Tables_number   1
_cell_volume   188.535
_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  0.799  0.201  0.500  1.0
  Mg  Mg1  1  0.301  0.196  0.500  1.0
  Mg  Mg2  1  0.804  0.699  0.500  1.0
  Mg  Mg3  1  0.189  0.350  0.000  1.0
  Mg  Mg4  1  0.650  0.811  0.000  1.0
  Mg  Mg5  1  0.638  0.362  0.000  1.0
  Mg  Mg6  1  0.189  0.811  0.000  1.0
  C  C7  1  0.430  0.570  0.500  1.0
[/CIF]
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The material described by SrMg6C crystallizes in the orthorhombic Amm2 space group. Sr(1) is bonded in a 6-coordinate geometry to two equivalent Mg(3), four equivalent Mg(2), and four equivalent Mg(4) atoms. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a single-bond geometry to two equivalent Mg(3), two equivalent Mg(4), and one C(1) atom. In the second Mg site, Mg(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Sr(1), one Mg(4), and two equivalent C(1) atoms. In the third Mg site, Mg(3) is bonded in a 8-coordinate geometry to two equivalent Sr(1), two equivalent Mg(4), and four equivalent Mg(1) atoms. In the fourth Mg site, Mg(4) is bonded in a 12-coordinate geometry to four equivalent Sr(1), two equivalent Mg(2), two equivalent Mg(3), and four equivalent Mg(1) atoms. C(1) is bonded in a 6-coordinate geometry to two equivalent Mg(1) and four equivalent Mg(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrMg6C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.741
_cell_length_b   7.741
_cell_length_c   4.527
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   135.981
_symmetry_Int_Tables_number   1
_cell_volume   188.535
_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  0.799  0.201  0.500  1.0
  Mg  Mg1  1  0.301  0.196  0.500  1.0
  Mg  Mg2  1  0.804  0.699  0.500  1.0
  Mg  Mg3  1  0.189  0.350  0.000  1.0
  Mg  Mg4  1  0.650  0.811  0.000  1.0
  Mg  Mg5  1  0.638  0.362  0.000  1.0
  Mg  Mg6  1  0.189  0.811  0.000  1.0
  C  C7  1  0.430  0.570  0.500  1.0
[/CIF]
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