The material described by TbCrGeO5 crystallizes in the orthorhombic Pbam space group. Tb(1) is bonded in a 8-coordinate geometry to two equivalent O(3), two equivalent O(4), and four equivalent O(1) atoms. Cr(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CrO6 octahedra that share corners with four equivalent Ge(1)O5 square pyramids and edges with two equivalent Cr(1)O6 octahedra. Ge(1) is bonded to one O(2), two equivalent O(1), and two equivalent O(4) atoms to form distorted GeO5 square pyramids that share corners with four equivalent Cr(1)O6 octahedra and  an edgeedge with one Ge(1)O5 square pyramid. The corner-sharing octahedral tilt angles range from 48-54°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Tb(1), one Cr(1), and one Ge(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to two equivalent Cr(1) and one Ge(1) atom. In the third O site, O(3) is bonded to two equivalent Tb(1) and two equivalent Cr(1) atoms to form distorted OTb2Cr2 trigonal pyramids that share corners with four equivalent O(4)Tb2Ge2 tetrahedra, corners with two equivalent O(3)Tb2Cr2 trigonal pyramids, and  an edgeedge with one O(3)Tb2Cr2 trigonal pyramid. In the fourth O site, O(4) is bonded to two equivalent Tb(1) and two equivalent Ge(1) atoms to form distorted OTb2Ge2 tetrahedra that share corners with four equivalent O(3)Tb2Cr2 trigonal pyramids and edges with two equivalent O(4)Tb2Ge2 tetrahedra. is represented by the CIF card [CIF]
data_TbCrGeO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.814
_cell_length_b   7.447
_cell_length_c   8.514
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   368.581
_cell_formula_units_Z   4
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
  Tb  Tb0  1  0.500  0.358  0.326  1.0
  Tb  Tb1  1  0.500  0.642  0.674  1.0
  Tb  Tb2  1  0.500  0.142  0.826  1.0
  Tb  Tb3  1  0.500  0.858  0.174  1.0
  Cr  Cr4  1  0.249  0.000  0.500  1.0
  Cr  Cr5  1  0.751  0.000  0.500  1.0
  Cr  Cr6  1  0.751  0.500  0.000  1.0
  Cr  Cr7  1  0.249  0.500  0.000  1.0
  Ge  Ge8  1  0.000  0.116  0.145  1.0
  Ge  Ge9  1  0.000  0.884  0.855  1.0
  Ge  Ge10  1  0.000  0.384  0.645  1.0
  Ge  Ge11  1  0.000  0.616  0.355  1.0
  O  O12  1  0.249  0.110  0.282  1.0
  O  O13  1  0.751  0.890  0.718  1.0
  O  O14  1  0.249  0.890  0.718  1.0
  O  O15  1  0.751  0.390  0.782  1.0
  O  O16  1  0.751  0.110  0.282  1.0
  O  O17  1  0.249  0.610  0.218  1.0
  O  O18  1  0.751  0.610  0.218  1.0
  O  O19  1  0.249  0.390  0.782  1.0
  O  O20  1  0.000  0.342  0.080  1.0
  O  O21  1  0.000  0.658  0.920  1.0
  O  O22  1  0.000  0.158  0.580  1.0
  O  O23  1  0.000  0.842  0.420  1.0
  O  O24  1  0.500  0.331  0.056  1.0
  O  O25  1  0.500  0.669  0.944  1.0
  O  O26  1  0.500  0.169  0.556  1.0
  O  O27  1  0.500  0.831  0.444  1.0
  O  O28  1  0.211  0.000  0.000  1.0
  O  O29  1  0.789  0.000  0.000  1.0
  O  O30  1  0.789  0.500  0.500  1.0
  O  O31  1  0.211  0.500  0.500  1.0
[/CIF]
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The material described by TbCrGeO5 crystallizes in the orthorhombic Pbam space group. Tb(1) is bonded in a 8-coordinate geometry to two equivalent O(3), two equivalent O(4), and four equivalent O(1) atoms. Cr(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CrO6 octahedra that share corners with four equivalent Ge(1)O5 square pyramids and edges with two equivalent Cr(1)O6 octahedra. Ge(1) is bonded to one O(2), two equivalent O(1), and two equivalent O(4) atoms to form distorted GeO5 square pyramids that share corners with four equivalent Cr(1)O6 octahedra and  an edgeedge with one Ge(1)O5 square pyramid. The corner-sharing octahedral tilt angles range from 48-54°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Tb(1), one Cr(1), and one Ge(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to two equivalent Cr(1) and one Ge(1) atom. In the third O site, O(3) is bonded to two equivalent Tb(1) and two equivalent Cr(1) atoms to form distorted OTb2Cr2 trigonal pyramids that share corners with four equivalent O(4)Tb2Ge2 tetrahedra, corners with two equivalent O(3)Tb2Cr2 trigonal pyramids, and  an edgeedge with one O(3)Tb2Cr2 trigonal pyramid. In the fourth O site, O(4) is bonded to two equivalent Tb(1) and two equivalent Ge(1) atoms to form distorted OTb2Ge2 tetrahedra that share corners with four equivalent O(3)Tb2Cr2 trigonal pyramids and edges with two equivalent O(4)Tb2Ge2 tetrahedra. is represented by the CIF card [CIF]
data_TbCrGeO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.814
_cell_length_b   7.447
_cell_length_c   8.514
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   368.581
_cell_formula_units_Z   4
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
  Tb  Tb0  1  0.500  0.358  0.326  1.0
  Tb  Tb1  1  0.500  0.642  0.674  1.0
  Tb  Tb2  1  0.500  0.142  0.826  1.0
  Tb  Tb3  1  0.500  0.858  0.174  1.0
  Cr  Cr4  1  0.249  0.000  0.500  1.0
  Cr  Cr5  1  0.751  0.000  0.500  1.0
  Cr  Cr6  1  0.751  0.500  0.000  1.0
  Cr  Cr7  1  0.249  0.500  0.000  1.0
  Ge  Ge8  1  0.000  0.116  0.145  1.0
  Ge  Ge9  1  0.000  0.884  0.855  1.0
  Ge  Ge10  1  0.000  0.384  0.645  1.0
  Ge  Ge11  1  0.000  0.616  0.355  1.0
  O  O12  1  0.249  0.110  0.282  1.0
  O  O13  1  0.751  0.890  0.718  1.0
  O  O14  1  0.249  0.890  0.718  1.0
  O  O15  1  0.751  0.390  0.782  1.0
  O  O16  1  0.751  0.110  0.282  1.0
  O  O17  1  0.249  0.610  0.218  1.0
  O  O18  1  0.751  0.610  0.218  1.0
  O  O19  1  0.249  0.390  0.782  1.0
  O  O20  1  0.000  0.342  0.080  1.0
  O  O21  1  0.000  0.658  0.920  1.0
  O  O22  1  0.000  0.158  0.580  1.0
  O  O23  1  0.000  0.842  0.420  1.0
  O  O24  1  0.500  0.331  0.056  1.0
  O  O25  1  0.500  0.669  0.944  1.0
  O  O26  1  0.500  0.169  0.556  1.0
  O  O27  1  0.500  0.831  0.444  1.0
  O  O28  1  0.211  0.000  0.000  1.0
  O  O29  1  0.789  0.000  0.000  1.0
  O  O30  1  0.789  0.500  0.500  1.0
  O  O31  1  0.211  0.500  0.500  1.0
[/CIF]
.