The structure described by Sr2LaGa11O20 crystallizes in the monoclinic Cm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to one O(10), one O(9), two equivalent O(1), and two equivalent O(2) atoms. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one O(5), two equivalent O(2), two equivalent O(3), and two equivalent O(8) atoms. La(1) is bonded in a 7-coordinate geometry to one O(6), two equivalent O(1), two equivalent O(4), and two equivalent O(7) atoms. There are six inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(11), one O(12), one O(3), one O(4), one O(5), and one O(6) atom to form GaO6 octahedra that share  a cornercorner with one Ga(2)O4 tetrahedra,  a cornercorner with one Ga(3)O4 tetrahedra, corners with two equivalent Ga(4)O4 tetrahedra, corners with two equivalent Ga(5)O4 tetrahedra,  an edgeedge with one Ga(1)O6 octahedra, and edges with two equivalent Ga(6)O6 octahedra. In the second Ga site, Ga(2) is bonded to one O(1), one O(11), one O(7), and one O(9) atom to form GaO4 tetrahedra that share  a cornercorner with one Ga(1)O6 octahedra,  a cornercorner with one Ga(2)O4 tetrahedra,  a cornercorner with one Ga(4)O4 tetrahedra, and corners with two equivalent Ga(5)O4 tetrahedra. The corner-sharing octahedral tilt angles are 53°. In the third Ga site, Ga(3) is bonded to one O(10), one O(12), one O(2), and one O(8) atom to form GaO4 tetrahedra that share  a cornercorner with one Ga(1)O6 octahedra,  a cornercorner with one Ga(3)O4 tetrahedra,  a cornercorner with one Ga(5)O4 tetrahedra, and corners with two equivalent Ga(4)O4 tetrahedra. The corner-sharing octahedral tilt angles are 53°. In the fourth Ga site, Ga(4) is bonded to one O(12), one O(2), one O(4), and one O(7) atom to form GaO4 tetrahedra that share  a cornercorner with one Ga(6)O6 octahedra, corners with two equivalent Ga(1)O6 octahedra,  a cornercorner with one Ga(2)O4 tetrahedra, and corners with two equivalent Ga(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 45-68°. In the fifth Ga site, Ga(5) is bonded to one O(1), one O(11), one O(3), and one O(8) atom to form GaO4 tetrahedra that share  a cornercorner with one Ga(6)O6 octahedra, corners with two equivalent Ga(1)O6 octahedra,  a cornercorner with one Ga(3)O4 tetrahedra, and corners with two equivalent Ga(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 43-65°. In the sixth Ga site, Ga(6) is bonded to one O(5), one O(6), two equivalent O(3), and two equivalent O(4) atoms to form GaO6 octahedra that share corners with two equivalent Ga(4)O4 tetrahedra, corners with two equivalent Ga(5)O4 tetrahedra, and edges with four equivalent Ga(1)O6 octahedra. There are twelve inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), one La(1), one Ga(2), and one Ga(5) atom to form distorted OSrLaGa2 tetrahedra that share corners with two equivalent O(2)Sr2Ga2 tetrahedra and  an edgeedge with one O(1)SrLaGa2 tetrahedra. In the second O site, O(2) is bonded to one Sr(1), one Sr(2), one Ga(3), and one Ga(4) atom to form distorted OSr2Ga2 tetrahedra that share  a cornercorner with one O(5)SrGa3 tetrahedra, corners with two equivalent O(1)SrLaGa2 tetrahedra, and  an edgeedge with one O(2)Sr2Ga2 tetrahedra. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Sr(2), one Ga(1), one Ga(5), and one Ga(6) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one La(1), one Ga(1), one Ga(4), and one Ga(6) atom. In the fifth O site, O(5) is bonded to one Sr(2), one Ga(6), and two equivalent Ga(1) atoms to form distorted corner-sharing OSrGa3 tetrahedra. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one La(1), one Ga(6), and two equivalent Ga(1) atoms. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one La(1), one Ga(2), and one Ga(4) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Sr(2), one Ga(3), and one Ga(5) atom. In the ninth O site, O(9) is bonded in a trigonal planar geometry to one Sr(1) and two equivalent Ga(2) atoms. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Sr(1) and two equivalent Ga(3) atoms. In the eleventh O site, O(11) is bonded in a trigonal planar geometry to one Ga(1), one Ga(2), and one Ga(5) atom. In the twelfth O site, O(12) is bonded in a trigonal planar geometry to one Ga(1), one Ga(3), and one Ga(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2LaGa11O20
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.166
_cell_length_b   9.757
_cell_length_c   9.757
_cell_angle_alpha   74.507
_cell_angle_beta   75.424
_cell_angle_gamma   75.424
_symmetry_Int_Tables_number   1
_cell_volume   449.629
_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  0.999  0.995  0.995  1.0
  Sr  Sr1  1  0.289  0.720  0.720  1.0
  La  La2  1  0.699  0.284  0.284  1.0
  Ga  Ga3  1  0.500  0.368  0.633  1.0
  Ga  Ga4  1  0.500  0.633  0.368  1.0
  Ga  Ga5  1  0.351  0.007  0.279  1.0
  Ga  Ga6  1  0.652  0.721  0.993  1.0
  Ga  Ga7  1  0.652  0.993  0.721  1.0
  Ga  Ga8  1  0.351  0.279  0.007  1.0
  Ga  Ga9  1  0.161  0.146  0.579  1.0
  Ga  Ga10  1  0.839  0.424  0.854  1.0
  Ga  Ga11  1  0.839  0.854  0.424  1.0
  Ga  Ga12  1  0.161  0.579  0.146  1.0
  Ga  Ga13  1  0.997  0.499  0.499  1.0
  O  O14  1  0.983  0.291  0.012  1.0
  O  O15  1  0.014  0.996  0.717  1.0
  O  O16  1  0.014  0.717  0.996  1.0
  O  O17  1  0.983  0.012  0.291  1.0
  O  O18  1  0.112  0.456  0.693  1.0
  O  O19  1  0.884  0.301  0.534  1.0
  O  O20  1  0.884  0.534  0.301  1.0
  O  O21  1  0.112  0.693  0.456  1.0
  O  O22  1  0.608  0.564  0.564  1.0
  O  O23  1  0.390  0.428  0.428  1.0
  O  O24  1  0.368  0.129  0.394  1.0
  O  O25  1  0.640  0.603  0.877  1.0
  O  O26  1  0.640  0.877  0.603  1.0
  O  O27  1  0.368  0.394  0.129  1.0
  O  O28  1  0.510  0.096  0.096  1.0
  O  O29  1  0.499  0.908  0.908  1.0
  O  O30  1  0.583  0.830  0.328  1.0
  O  O31  1  0.419  0.671  0.171  1.0
  O  O32  1  0.419  0.171  0.671  1.0
  O  O33  1  0.583  0.328  0.830  1.0
[/CIF]
.
The structure described by Sr2LaGa11O20 crystallizes in the monoclinic Cm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to one O(10), one O(9), two equivalent O(1), and two equivalent O(2) atoms. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one O(5), two equivalent O(2), two equivalent O(3), and two equivalent O(8) atoms. La(1) is bonded in a 7-coordinate geometry to one O(6), two equivalent O(1), two equivalent O(4), and two equivalent O(7) atoms. There are six inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(11), one O(12), one O(3), one O(4), one O(5), and one O(6) atom to form GaO6 octahedra that share  a cornercorner with one Ga(2)O4 tetrahedra,  a cornercorner with one Ga(3)O4 tetrahedra, corners with two equivalent Ga(4)O4 tetrahedra, corners with two equivalent Ga(5)O4 tetrahedra,  an edgeedge with one Ga(1)O6 octahedra, and edges with two equivalent Ga(6)O6 octahedra. In the second Ga site, Ga(2) is bonded to one O(1), one O(11), one O(7), and one O(9) atom to form GaO4 tetrahedra that share  a cornercorner with one Ga(1)O6 octahedra,  a cornercorner with one Ga(2)O4 tetrahedra,  a cornercorner with one Ga(4)O4 tetrahedra, and corners with two equivalent Ga(5)O4 tetrahedra. The corner-sharing octahedral tilt angles are 53°. In the third Ga site, Ga(3) is bonded to one O(10), one O(12), one O(2), and one O(8) atom to form GaO4 tetrahedra that share  a cornercorner with one Ga(1)O6 octahedra,  a cornercorner with one Ga(3)O4 tetrahedra,  a cornercorner with one Ga(5)O4 tetrahedra, and corners with two equivalent Ga(4)O4 tetrahedra. The corner-sharing octahedral tilt angles are 53°. In the fourth Ga site, Ga(4) is bonded to one O(12), one O(2), one O(4), and one O(7) atom to form GaO4 tetrahedra that share  a cornercorner with one Ga(6)O6 octahedra, corners with two equivalent Ga(1)O6 octahedra,  a cornercorner with one Ga(2)O4 tetrahedra, and corners with two equivalent Ga(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 45-68°. In the fifth Ga site, Ga(5) is bonded to one O(1), one O(11), one O(3), and one O(8) atom to form GaO4 tetrahedra that share  a cornercorner with one Ga(6)O6 octahedra, corners with two equivalent Ga(1)O6 octahedra,  a cornercorner with one Ga(3)O4 tetrahedra, and corners with two equivalent Ga(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 43-65°. In the sixth Ga site, Ga(6) is bonded to one O(5), one O(6), two equivalent O(3), and two equivalent O(4) atoms to form GaO6 octahedra that share corners with two equivalent Ga(4)O4 tetrahedra, corners with two equivalent Ga(5)O4 tetrahedra, and edges with four equivalent Ga(1)O6 octahedra. There are twelve inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), one La(1), one Ga(2), and one Ga(5) atom to form distorted OSrLaGa2 tetrahedra that share corners with two equivalent O(2)Sr2Ga2 tetrahedra and  an edgeedge with one O(1)SrLaGa2 tetrahedra. In the second O site, O(2) is bonded to one Sr(1), one Sr(2), one Ga(3), and one Ga(4) atom to form distorted OSr2Ga2 tetrahedra that share  a cornercorner with one O(5)SrGa3 tetrahedra, corners with two equivalent O(1)SrLaGa2 tetrahedra, and  an edgeedge with one O(2)Sr2Ga2 tetrahedra. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Sr(2), one Ga(1), one Ga(5), and one Ga(6) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one La(1), one Ga(1), one Ga(4), and one Ga(6) atom. In the fifth O site, O(5) is bonded to one Sr(2), one Ga(6), and two equivalent Ga(1) atoms to form distorted corner-sharing OSrGa3 tetrahedra. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one La(1), one Ga(6), and two equivalent Ga(1) atoms. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one La(1), one Ga(2), and one Ga(4) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Sr(2), one Ga(3), and one Ga(5) atom. In the ninth O site, O(9) is bonded in a trigonal planar geometry to one Sr(1) and two equivalent Ga(2) atoms. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Sr(1) and two equivalent Ga(3) atoms. In the eleventh O site, O(11) is bonded in a trigonal planar geometry to one Ga(1), one Ga(2), and one Ga(5) atom. In the twelfth O site, O(12) is bonded in a trigonal planar geometry to one Ga(1), one Ga(3), and one Ga(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2LaGa11O20
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.166
_cell_length_b   9.757
_cell_length_c   9.757
_cell_angle_alpha   74.507
_cell_angle_beta   75.424
_cell_angle_gamma   75.424
_symmetry_Int_Tables_number   1
_cell_volume   449.629
_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  0.999  0.995  0.995  1.0
  Sr  Sr1  1  0.289  0.720  0.720  1.0
  La  La2  1  0.699  0.284  0.284  1.0
  Ga  Ga3  1  0.500  0.368  0.633  1.0
  Ga  Ga4  1  0.500  0.633  0.368  1.0
  Ga  Ga5  1  0.351  0.007  0.279  1.0
  Ga  Ga6  1  0.652  0.721  0.993  1.0
  Ga  Ga7  1  0.652  0.993  0.721  1.0
  Ga  Ga8  1  0.351  0.279  0.007  1.0
  Ga  Ga9  1  0.161  0.146  0.579  1.0
  Ga  Ga10  1  0.839  0.424  0.854  1.0
  Ga  Ga11  1  0.839  0.854  0.424  1.0
  Ga  Ga12  1  0.161  0.579  0.146  1.0
  Ga  Ga13  1  0.997  0.499  0.499  1.0
  O  O14  1  0.983  0.291  0.012  1.0
  O  O15  1  0.014  0.996  0.717  1.0
  O  O16  1  0.014  0.717  0.996  1.0
  O  O17  1  0.983  0.012  0.291  1.0
  O  O18  1  0.112  0.456  0.693  1.0
  O  O19  1  0.884  0.301  0.534  1.0
  O  O20  1  0.884  0.534  0.301  1.0
  O  O21  1  0.112  0.693  0.456  1.0
  O  O22  1  0.608  0.564  0.564  1.0
  O  O23  1  0.390  0.428  0.428  1.0
  O  O24  1  0.368  0.129  0.394  1.0
  O  O25  1  0.640  0.603  0.877  1.0
  O  O26  1  0.640  0.877  0.603  1.0
  O  O27  1  0.368  0.394  0.129  1.0
  O  O28  1  0.510  0.096  0.096  1.0
  O  O29  1  0.499  0.908  0.908  1.0
  O  O30  1  0.583  0.830  0.328  1.0
  O  O31  1  0.419  0.671  0.171  1.0
  O  O32  1  0.419  0.171  0.671  1.0
  O  O33  1  0.583  0.328  0.830  1.0
[/CIF]
.