The crystal structure described by Sr28In11 crystallizes in the orthorhombic Imm2 space group. There are fifteen inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a distorted single-bond geometry to one In(5) and two equivalent In(4) atoms. In the second Sr site, Sr(2) is bonded in a trigonal planar geometry to three equivalent In(3) atoms. In the third Sr site, Sr(3) is bonded to one In(5) and three equivalent In(3) atoms to form a mixture of distorted corner and edge-sharing SrIn4 tetrahedra. In the fourth Sr site, Sr(4) is bonded to one In(1), one In(5), and two equivalent In(4) atoms to form a mixture of distorted corner and edge-sharing SrIn4 tetrahedra. In the fifth Sr site, Sr(5) is bonded in a distorted trigonal non-coplanar geometry to one In(4) and two equivalent In(1) atoms. In the sixth Sr site, Sr(6) is bonded in a distorted trigonal non-coplanar geometry to one In(4) and two equivalent In(5) atoms. In the seventh Sr site, Sr(7) is bonded in a distorted trigonal planar geometry to one In(3) and two equivalent In(5) atoms. In the eighth Sr site, Sr(8) is bonded to one In(1), one In(2), and two equivalent In(6) atoms to form a mixture of distorted corner and edge-sharing SrIn4 tetrahedra. In the ninth Sr site, Sr(9) is bonded in a distorted trigonal non-coplanar geometry to one In(6) and two equivalent In(1) atoms. In the tenth Sr site, Sr(10) is bonded to one In(3), one In(4), and two equivalent In(5) atoms to form a mixture of distorted corner and edge-sharing SrIn4 tetrahedra. In the eleventh Sr site, Sr(11) is bonded in a trigonal planar geometry to one In(1) and two equivalent In(6) atoms. In the twelfth Sr site, Sr(12) is bonded in a distorted trigonal planar geometry to one In(1) and two equivalent In(4) atoms. In the thirteenth Sr site, Sr(13) is bonded to two equivalent In(2) and two equivalent In(6) atoms to form a mixture of distorted corner and edge-sharing SrIn4 tetrahedra. In the fourteenth Sr site, Sr(14) is bonded in a single-bond geometry to one In(2) atom. In the fifteenth Sr site, Sr(15) is bonded in a distorted trigonal non-coplanar geometry to one In(6) and two equivalent In(2) atoms. There are six inequivalent In sites. In the first In site, In(1) is bonded in a body-centered cubic geometry to one Sr(11), one Sr(12), one Sr(4), one Sr(8), two equivalent Sr(5), and two equivalent Sr(9) atoms. In the second In site, In(2) is bonded in a 9-coordinate geometry to one Sr(14), two equivalent Sr(13), two equivalent Sr(8), and four equivalent Sr(15) atoms. In the third In site, In(3) is bonded in a 8-coordinate geometry to one Sr(10), one Sr(7), three equivalent Sr(2), and three equivalent Sr(3) atoms. In the fourth In site, In(4) is bonded in a 9-coordinate geometry to one Sr(10), one Sr(5), one Sr(6), two equivalent Sr(1), two equivalent Sr(12), and two equivalent Sr(4) atoms. In the fifth In site, In(5) is bonded in a 9-coordinate geometry to one Sr(1), one Sr(3), one Sr(4), two equivalent Sr(10), two equivalent Sr(6), and two equivalent Sr(7) atoms. In the sixth In site, In(6) is bonded in a 7-coordinate geometry to one Sr(13), one Sr(15), one Sr(9), two equivalent Sr(11), and two equivalent Sr(8) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr28In11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.837
_cell_length_b   8.226
_cell_length_c   34.000
_cell_angle_alpha   96.940
_cell_angle_beta   94.906
_cell_angle_gamma   89.997
_symmetry_Int_Tables_number   1
_cell_volume   1614.622
_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  0.824  0.655  0.648  1.0
  Sr  Sr1  1  0.238  0.985  0.475  1.0
  Sr  Sr2  1  0.224  0.439  0.449  1.0
  Sr  Sr3  1  0.863  0.073  0.726  1.0
  Sr  Sr4  1  0.137  0.347  0.274  1.0
  Sr  Sr5  1  0.596  0.255  0.192  1.0
  Sr  Sr6  1  0.353  0.384  0.707  1.0
  Sr  Sr7  1  0.294  0.362  0.588  1.0
  Sr  Sr8  1  0.762  0.510  0.525  1.0
  Sr  Sr9  1  0.956  0.578  0.913  1.0
  Sr  Sr10  1  0.776  0.990  0.551  1.0
  Sr  Sr11  1  0.583  0.717  0.166  1.0
  Sr  Sr12  1  0.706  0.774  0.412  1.0
  Sr  Sr13  1  0.682  0.328  0.364  1.0
  Sr  Sr14  1  0.940  0.015  0.881  1.0
  Sr  Sr15  1  0.318  0.964  0.636  1.0
  Sr  Sr16  1  0.117  0.888  0.235  1.0
  Sr  Sr17  1  0.060  0.134  0.119  1.0
  Sr  Sr18  1  0.500  0.688  0.000  1.0
  Sr  Sr19  1  0.000  0.002  0.000  1.0
  Sr  Sr20  1  0.044  0.665  0.088  1.0
  Sr  Sr21  1  0.470  0.258  0.940  1.0
  Sr  Sr22  1  0.530  0.318  0.060  1.0
  Sr  Sr23  1  0.176  0.007  0.352  1.0
  Sr  Sr24  1  0.647  0.678  0.293  1.0
  Sr  Sr25  1  0.883  0.654  0.765  1.0
  Sr  Sr26  1  0.404  0.063  0.808  1.0
  Sr  Sr27  1  0.417  0.551  0.834  1.0
  In  In28  1  0.091  0.498  0.182  1.0
  In  In29  1  0.000  0.411  0.000  1.0
  In  In30  1  0.273  0.726  0.547  1.0
  In  In31  1  0.361  0.797  0.722  1.0
  In  In32  1  0.639  0.075  0.278  1.0
  In  In33  1  0.909  0.316  0.818  1.0
  In  In34  1  0.727  0.179  0.453  1.0
  In  In35  1  0.180  0.603  0.360  1.0
  In  In36  1  0.543  0.934  0.086  1.0
  In  In37  1  0.457  0.847  0.914  1.0
  In  In38  1  0.820  0.243  0.640  1.0
[/CIF]
.
The crystal structure described by Sr28In11 crystallizes in the orthorhombic Imm2 space group. There are fifteen inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a distorted single-bond geometry to one In(5) and two equivalent In(4) atoms. In the second Sr site, Sr(2) is bonded in a trigonal planar geometry to three equivalent In(3) atoms. In the third Sr site, Sr(3) is bonded to one In(5) and three equivalent In(3) atoms to form a mixture of distorted corner and edge-sharing SrIn4 tetrahedra. In the fourth Sr site, Sr(4) is bonded to one In(1), one In(5), and two equivalent In(4) atoms to form a mixture of distorted corner and edge-sharing SrIn4 tetrahedra. In the fifth Sr site, Sr(5) is bonded in a distorted trigonal non-coplanar geometry to one In(4) and two equivalent In(1) atoms. In the sixth Sr site, Sr(6) is bonded in a distorted trigonal non-coplanar geometry to one In(4) and two equivalent In(5) atoms. In the seventh Sr site, Sr(7) is bonded in a distorted trigonal planar geometry to one In(3) and two equivalent In(5) atoms. In the eighth Sr site, Sr(8) is bonded to one In(1), one In(2), and two equivalent In(6) atoms to form a mixture of distorted corner and edge-sharing SrIn4 tetrahedra. In the ninth Sr site, Sr(9) is bonded in a distorted trigonal non-coplanar geometry to one In(6) and two equivalent In(1) atoms. In the tenth Sr site, Sr(10) is bonded to one In(3), one In(4), and two equivalent In(5) atoms to form a mixture of distorted corner and edge-sharing SrIn4 tetrahedra. In the eleventh Sr site, Sr(11) is bonded in a trigonal planar geometry to one In(1) and two equivalent In(6) atoms. In the twelfth Sr site, Sr(12) is bonded in a distorted trigonal planar geometry to one In(1) and two equivalent In(4) atoms. In the thirteenth Sr site, Sr(13) is bonded to two equivalent In(2) and two equivalent In(6) atoms to form a mixture of distorted corner and edge-sharing SrIn4 tetrahedra. In the fourteenth Sr site, Sr(14) is bonded in a single-bond geometry to one In(2) atom. In the fifteenth Sr site, Sr(15) is bonded in a distorted trigonal non-coplanar geometry to one In(6) and two equivalent In(2) atoms. There are six inequivalent In sites. In the first In site, In(1) is bonded in a body-centered cubic geometry to one Sr(11), one Sr(12), one Sr(4), one Sr(8), two equivalent Sr(5), and two equivalent Sr(9) atoms. In the second In site, In(2) is bonded in a 9-coordinate geometry to one Sr(14), two equivalent Sr(13), two equivalent Sr(8), and four equivalent Sr(15) atoms. In the third In site, In(3) is bonded in a 8-coordinate geometry to one Sr(10), one Sr(7), three equivalent Sr(2), and three equivalent Sr(3) atoms. In the fourth In site, In(4) is bonded in a 9-coordinate geometry to one Sr(10), one Sr(5), one Sr(6), two equivalent Sr(1), two equivalent Sr(12), and two equivalent Sr(4) atoms. In the fifth In site, In(5) is bonded in a 9-coordinate geometry to one Sr(1), one Sr(3), one Sr(4), two equivalent Sr(10), two equivalent Sr(6), and two equivalent Sr(7) atoms. In the sixth In site, In(6) is bonded in a 7-coordinate geometry to one Sr(13), one Sr(15), one Sr(9), two equivalent Sr(11), and two equivalent Sr(8) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr28In11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.837
_cell_length_b   8.226
_cell_length_c   34.000
_cell_angle_alpha   96.940
_cell_angle_beta   94.906
_cell_angle_gamma   89.997
_symmetry_Int_Tables_number   1
_cell_volume   1614.622
_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  0.824  0.655  0.648  1.0
  Sr  Sr1  1  0.238  0.985  0.475  1.0
  Sr  Sr2  1  0.224  0.439  0.449  1.0
  Sr  Sr3  1  0.863  0.073  0.726  1.0
  Sr  Sr4  1  0.137  0.347  0.274  1.0
  Sr  Sr5  1  0.596  0.255  0.192  1.0
  Sr  Sr6  1  0.353  0.384  0.707  1.0
  Sr  Sr7  1  0.294  0.362  0.588  1.0
  Sr  Sr8  1  0.762  0.510  0.525  1.0
  Sr  Sr9  1  0.956  0.578  0.913  1.0
  Sr  Sr10  1  0.776  0.990  0.551  1.0
  Sr  Sr11  1  0.583  0.717  0.166  1.0
  Sr  Sr12  1  0.706  0.774  0.412  1.0
  Sr  Sr13  1  0.682  0.328  0.364  1.0
  Sr  Sr14  1  0.940  0.015  0.881  1.0
  Sr  Sr15  1  0.318  0.964  0.636  1.0
  Sr  Sr16  1  0.117  0.888  0.235  1.0
  Sr  Sr17  1  0.060  0.134  0.119  1.0
  Sr  Sr18  1  0.500  0.688  0.000  1.0
  Sr  Sr19  1  0.000  0.002  0.000  1.0
  Sr  Sr20  1  0.044  0.665  0.088  1.0
  Sr  Sr21  1  0.470  0.258  0.940  1.0
  Sr  Sr22  1  0.530  0.318  0.060  1.0
  Sr  Sr23  1  0.176  0.007  0.352  1.0
  Sr  Sr24  1  0.647  0.678  0.293  1.0
  Sr  Sr25  1  0.883  0.654  0.765  1.0
  Sr  Sr26  1  0.404  0.063  0.808  1.0
  Sr  Sr27  1  0.417  0.551  0.834  1.0
  In  In28  1  0.091  0.498  0.182  1.0
  In  In29  1  0.000  0.411  0.000  1.0
  In  In30  1  0.273  0.726  0.547  1.0
  In  In31  1  0.361  0.797  0.722  1.0
  In  In32  1  0.639  0.075  0.278  1.0
  In  In33  1  0.909  0.316  0.818  1.0
  In  In34  1  0.727  0.179  0.453  1.0
  In  In35  1  0.180  0.603  0.360  1.0
  In  In36  1  0.543  0.934  0.086  1.0
  In  In37  1  0.457  0.847  0.914  1.0
  In  In38  1  0.820  0.243  0.640  1.0
[/CIF]
.