The compound described by Sr4MgTb2(RuO6)2 is Orthorhombic Perovskite-derived structured and crystallizes in the triclinic P1 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(2), one O(4), one O(5), one O(6), one O(7), and one O(9) atom. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(5), one O(6), one O(8), and one O(9) atom. In the third Sr site, Sr(3) is bonded in a 8-coordinate geometry to one Mg(1), one O(11), one O(12), one O(3), one O(4), one O(6), one O(7), and one O(8) atom. In the fourth Sr site, Sr(4) is bonded in a 8-coordinate geometry to one O(12), one O(3), one O(4), one O(5), one O(7), one O(8), and two equivalent O(11) atoms. Mg(1) is bonded in a 4-coordinate geometry to one Sr(3), one O(1), one O(11), one O(12), one O(3), and one O(5) atom. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 5-coordinate geometry to one O(1), one O(11), one O(3), one O(5), one O(7), and one O(9) atom. In the second Tb site, Tb(2) is bonded to one O(10), one O(12), one O(2), one O(4), one O(6), and one O(8) atom to form TbO6 octahedra that share corners with two equivalent Ru(1)O6 octahedra and corners with four equivalent Ru(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 24-34°. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded to one O(1), one O(10), one O(12), one O(3), one O(5), and one O(7) atom to form RuO6 octahedra that share corners with two equivalent Tb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 28-34°. In the second Ru site, Ru(2) is bonded to one O(11), one O(2), one O(4), one O(6), one O(8), and one O(9) atom to form RuO6 octahedra that share corners with four equivalent Tb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 24-28°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(2), one Mg(1), one Tb(1), and one Ru(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Tb(2), and one Ru(2) atom. In the third O site, O(3) is bonded in a 6-coordinate geometry to one Sr(2), one Sr(3), one Sr(4), one Mg(1), one Tb(1), and one Ru(1) atom. In the fourth O site, O(4) is bonded to one Sr(1), one Sr(3), one Sr(4), one Tb(2), and one Ru(2) atom to form distorted OSr3TbRu trigonal bipyramids that share edges with two equivalent O(6)Sr3TbRu square pyramids,  an edgeedge with one O(9)Sr2TbRu tetrahedra, and edges with two equivalent O(8)Sr3TbRu trigonal bipyramids. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), one Sr(4), one Mg(1), one Tb(1), and one Ru(1) atom. In the sixth O site, O(6) is bonded to one Sr(1), one Sr(2), one Sr(3), one Tb(2), and one Ru(2) atom to form distorted OSr3TbRu square pyramids that share corners with three equivalent O(9)Sr2TbRu tetrahedra, corners with two equivalent O(8)Sr3TbRu trigonal bipyramids,  an edgeedge with one O(8)Sr3TbRu trigonal bipyramid, and edges with two equivalent O(4)Sr3TbRu trigonal bipyramids. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(3), one Sr(4), one Tb(1), and one Ru(1) atom. In the eighth O site, O(8) is bonded to one Sr(2), one Sr(3), one Sr(4), one Tb(2), and one Ru(2) atom to form distorted OSr3TbRu trigonal bipyramids that share corners with two equivalent O(6)Sr3TbRu square pyramids,  an edgeedge with one O(6)Sr3TbRu square pyramid,  an edgeedge with one O(9)Sr2TbRu tetrahedra, and edges with two equivalent O(4)Sr3TbRu trigonal bipyramids. In the ninth O site, O(9) is bonded to one Sr(1), one Sr(2), one Tb(1), and one Ru(2) atom to form a mixture of distorted corner and edge-sharing OSr2TbRu tetrahedra. In the tenth O site, O(10) is bonded in a distorted see-saw-like geometry to one Sr(1), one Sr(2), one Tb(2), and one Ru(1) atom. In the eleventh O site, O(11) is bonded in a 6-coordinate geometry to one Sr(3), two equivalent Sr(4), one Mg(1), one Tb(1), and one Ru(2) atom. In the twelfth O site, O(12) is bonded in a 5-coordinate geometry to one Sr(3), one Sr(4), one Mg(1), one Tb(2), and one Ru(1) atom. is represented by the CIF file [CIF]
data_Sr4Tb2Mg(RuO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.817
_cell_length_b   6.137
_cell_length_c   8.369
_cell_angle_alpha   87.355
_cell_angle_beta   92.197
_cell_angle_gamma   92.036
_symmetry_Int_Tables_number   1
_cell_volume   298.044
_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  0.987  0.445  0.735  1.0
  Sr  Sr1  1  0.508  0.924  0.743  1.0
  Sr  Sr2  1  0.452  0.121  0.305  1.0
  Sr  Sr3  1  0.065  0.563  0.244  1.0
  Tb  Tb4  1  0.517  0.424  0.976  1.0
  Tb  Tb5  1  0.984  0.002  0.504  1.0
  Mg  Mg6  1  0.635  0.805  0.131  1.0
  Ru  Ru7  1  0.022  0.991  0.997  1.0
  Ru  Ru8  1  0.495  0.517  0.503  1.0
  O  O9  1  0.723  0.148  0.955  1.0
  O  O10  1  0.766  0.708  0.550  1.0
  O  O11  1  0.313  0.822  0.053  1.0
  O  O12  1  0.208  0.316  0.465  1.0
  O  O13  1  0.815  0.693  0.960  1.0
  O  O14  1  0.690  0.235  0.544  1.0
  O  O15  1  0.191  0.270  0.053  1.0
  O  O16  1  0.297  0.792  0.465  1.0
  O  O17  1  0.414  0.513  0.734  1.0
  O  O18  1  0.088  0.022  0.768  1.0
  O  O19  1  0.576  0.514  0.251  1.0
  O  O20  1  0.899  0.957  0.236  1.0
[/CIF]
.
The compound described by Sr4MgTb2(RuO6)2 is Orthorhombic Perovskite-derived structured and crystallizes in the triclinic P1 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(2), one O(4), one O(5), one O(6), one O(7), and one O(9) atom. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(5), one O(6), one O(8), and one O(9) atom. In the third Sr site, Sr(3) is bonded in a 8-coordinate geometry to one Mg(1), one O(11), one O(12), one O(3), one O(4), one O(6), one O(7), and one O(8) atom. In the fourth Sr site, Sr(4) is bonded in a 8-coordinate geometry to one O(12), one O(3), one O(4), one O(5), one O(7), one O(8), and two equivalent O(11) atoms. Mg(1) is bonded in a 4-coordinate geometry to one Sr(3), one O(1), one O(11), one O(12), one O(3), and one O(5) atom. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 5-coordinate geometry to one O(1), one O(11), one O(3), one O(5), one O(7), and one O(9) atom. In the second Tb site, Tb(2) is bonded to one O(10), one O(12), one O(2), one O(4), one O(6), and one O(8) atom to form TbO6 octahedra that share corners with two equivalent Ru(1)O6 octahedra and corners with four equivalent Ru(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 24-34°. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded to one O(1), one O(10), one O(12), one O(3), one O(5), and one O(7) atom to form RuO6 octahedra that share corners with two equivalent Tb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 28-34°. In the second Ru site, Ru(2) is bonded to one O(11), one O(2), one O(4), one O(6), one O(8), and one O(9) atom to form RuO6 octahedra that share corners with four equivalent Tb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 24-28°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(2), one Mg(1), one Tb(1), and one Ru(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Tb(2), and one Ru(2) atom. In the third O site, O(3) is bonded in a 6-coordinate geometry to one Sr(2), one Sr(3), one Sr(4), one Mg(1), one Tb(1), and one Ru(1) atom. In the fourth O site, O(4) is bonded to one Sr(1), one Sr(3), one Sr(4), one Tb(2), and one Ru(2) atom to form distorted OSr3TbRu trigonal bipyramids that share edges with two equivalent O(6)Sr3TbRu square pyramids,  an edgeedge with one O(9)Sr2TbRu tetrahedra, and edges with two equivalent O(8)Sr3TbRu trigonal bipyramids. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), one Sr(4), one Mg(1), one Tb(1), and one Ru(1) atom. In the sixth O site, O(6) is bonded to one Sr(1), one Sr(2), one Sr(3), one Tb(2), and one Ru(2) atom to form distorted OSr3TbRu square pyramids that share corners with three equivalent O(9)Sr2TbRu tetrahedra, corners with two equivalent O(8)Sr3TbRu trigonal bipyramids,  an edgeedge with one O(8)Sr3TbRu trigonal bipyramid, and edges with two equivalent O(4)Sr3TbRu trigonal bipyramids. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(3), one Sr(4), one Tb(1), and one Ru(1) atom. In the eighth O site, O(8) is bonded to one Sr(2), one Sr(3), one Sr(4), one Tb(2), and one Ru(2) atom to form distorted OSr3TbRu trigonal bipyramids that share corners with two equivalent O(6)Sr3TbRu square pyramids,  an edgeedge with one O(6)Sr3TbRu square pyramid,  an edgeedge with one O(9)Sr2TbRu tetrahedra, and edges with two equivalent O(4)Sr3TbRu trigonal bipyramids. In the ninth O site, O(9) is bonded to one Sr(1), one Sr(2), one Tb(1), and one Ru(2) atom to form a mixture of distorted corner and edge-sharing OSr2TbRu tetrahedra. In the tenth O site, O(10) is bonded in a distorted see-saw-like geometry to one Sr(1), one Sr(2), one Tb(2), and one Ru(1) atom. In the eleventh O site, O(11) is bonded in a 6-coordinate geometry to one Sr(3), two equivalent Sr(4), one Mg(1), one Tb(1), and one Ru(2) atom. In the twelfth O site, O(12) is bonded in a 5-coordinate geometry to one Sr(3), one Sr(4), one Mg(1), one Tb(2), and one Ru(1) atom. is represented by the CIF file [CIF]
data_Sr4Tb2Mg(RuO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.817
_cell_length_b   6.137
_cell_length_c   8.369
_cell_angle_alpha   87.355
_cell_angle_beta   92.197
_cell_angle_gamma   92.036
_symmetry_Int_Tables_number   1
_cell_volume   298.044
_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  0.987  0.445  0.735  1.0
  Sr  Sr1  1  0.508  0.924  0.743  1.0
  Sr  Sr2  1  0.452  0.121  0.305  1.0
  Sr  Sr3  1  0.065  0.563  0.244  1.0
  Tb  Tb4  1  0.517  0.424  0.976  1.0
  Tb  Tb5  1  0.984  0.002  0.504  1.0
  Mg  Mg6  1  0.635  0.805  0.131  1.0
  Ru  Ru7  1  0.022  0.991  0.997  1.0
  Ru  Ru8  1  0.495  0.517  0.503  1.0
  O  O9  1  0.723  0.148  0.955  1.0
  O  O10  1  0.766  0.708  0.550  1.0
  O  O11  1  0.313  0.822  0.053  1.0
  O  O12  1  0.208  0.316  0.465  1.0
  O  O13  1  0.815  0.693  0.960  1.0
  O  O14  1  0.690  0.235  0.544  1.0
  O  O15  1  0.191  0.270  0.053  1.0
  O  O16  1  0.297  0.792  0.465  1.0
  O  O17  1  0.414  0.513  0.734  1.0
  O  O18  1  0.088  0.022  0.768  1.0
  O  O19  1  0.576  0.514  0.251  1.0
  O  O20  1  0.899  0.957  0.236  1.0
[/CIF]
.