The structure described by Sr2Mg(BO3)2 crystallizes in the monoclinic C2/m space group. Sr(1) is bonded in a 9-coordinate geometry to three equivalent O(1) and six equivalent O(2) atoms. Mg(1) is bonded in an octahedral geometry to two equivalent O(1) and four equivalent O(2) atoms. B(1) is bonded in a trigonal planar geometry to one O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to three equivalent Sr(1), one Mg(1), and one B(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Sr(1), one Mg(1), and one B(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2Mg(BO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.252
_cell_length_b   5.252
_cell_length_c   6.199
_cell_angle_alpha   65.297
_cell_angle_beta   65.297
_cell_angle_gamma   59.268
_symmetry_Int_Tables_number   1
_cell_volume   128.869
_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  0.709  0.709  0.815  1.0
  Sr  Sr1  1  0.291  0.291  0.185  1.0
  Mg  Mg2  1  0.500  0.500  0.500  1.0
  B  B3  1  0.938  0.938  0.264  1.0
  B  B4  1  0.062  0.062  0.736  1.0
  O  O5  1  0.769  0.769  0.339  1.0
  O  O6  1  0.207  0.745  0.768  1.0
  O  O7  1  0.255  0.793  0.232  1.0
  O  O8  1  0.793  0.255  0.232  1.0
  O  O9  1  0.745  0.207  0.768  1.0
  O  O10  1  0.231  0.231  0.661  1.0
[/CIF]
.
The structure described by Sr2Mg(BO3)2 crystallizes in the monoclinic C2/m space group. Sr(1) is bonded in a 9-coordinate geometry to three equivalent O(1) and six equivalent O(2) atoms. Mg(1) is bonded in an octahedral geometry to two equivalent O(1) and four equivalent O(2) atoms. B(1) is bonded in a trigonal planar geometry to one O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to three equivalent Sr(1), one Mg(1), and one B(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Sr(1), one Mg(1), and one B(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2Mg(BO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.252
_cell_length_b   5.252
_cell_length_c   6.199
_cell_angle_alpha   65.297
_cell_angle_beta   65.297
_cell_angle_gamma   59.268
_symmetry_Int_Tables_number   1
_cell_volume   128.869
_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  0.709  0.709  0.815  1.0
  Sr  Sr1  1  0.291  0.291  0.185  1.0
  Mg  Mg2  1  0.500  0.500  0.500  1.0
  B  B3  1  0.938  0.938  0.264  1.0
  B  B4  1  0.062  0.062  0.736  1.0
  O  O5  1  0.769  0.769  0.339  1.0
  O  O6  1  0.207  0.745  0.768  1.0
  O  O7  1  0.255  0.793  0.232  1.0
  O  O8  1  0.793  0.255  0.232  1.0
  O  O9  1  0.745  0.207  0.768  1.0
  O  O10  1  0.231  0.231  0.661  1.0
[/CIF]
.