The material described by Ca5Ge3O11 crystallizes in the triclinic P-1 space group. There are five inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(4), one O(5), one O(7), one O(8), and one O(9) atom. In the second Ca site, Ca(2) is bonded to one O(1), one O(11), one O(2), one O(5), one O(6), and one O(8) atom to form distorted CaO6 octahedra that share corners with two equivalent Ca(4)O6 octahedra, corners with two equivalent Ge(1)O4 tetrahedra, corners with two equivalent Ge(2)O4 tetrahedra, and corners with two equivalent Ge(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 66-73°. In the third Ca site, Ca(3) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(11), one O(2), one O(4), one O(7), and one O(9) atom. In the fourth Ca site, Ca(4) is bonded to one O(4), one O(6), one O(8), one O(9), and two equivalent O(10) atoms to form distorted CaO6 octahedra that share corners with two equivalent Ca(2)O6 octahedra, corners with two equivalent Ge(3)O4 tetrahedra, corners with four equivalent Ge(1)O4 tetrahedra, and  an edgeedge with one Ca(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 66-73°. In the fifth Ca site, Ca(5) is bonded in a 6-coordinate geometry to one O(5), one O(7), two equivalent O(11), and two equivalent O(3) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(10), one O(2), one O(8), and one O(9) atom to form GeO4 tetrahedra that share corners with two equivalent Ca(2)O6 octahedra and corners with four equivalent Ca(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-75°. In the second Ge site, Ge(2) is bonded to one O(1), one O(3), one O(5), and one O(7) atom to form GeO4 tetrahedra that share corners with two equivalent Ca(2)O6 octahedra and  a cornercorner with one Ge(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-57°. In the third Ge site, Ge(3) is bonded to one O(11), one O(3), one O(4), and one O(6) atom to form distorted GeO4 tetrahedra that share corners with two equivalent Ca(2)O6 octahedra, corners with two equivalent Ca(4)O6 octahedra, and  a cornercorner with one Ge(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-69°. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Ca(1), one Ca(2), one Ca(3), and one Ge(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Ca(3), and one Ge(1) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to two equivalent Ca(5), one Ge(2), and one Ge(3) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(3), one Ca(4), and one Ge(3) atom. In the fifth O site, O(5) is bonded to one Ca(1), one Ca(2), one Ca(5), and one Ge(2) atom to form a mixture of distorted corner and edge-sharing OCa3Ge tetrahedra. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Ca(2), one Ca(4), and one Ge(3) atom. In the seventh O site, O(7) is bonded to one Ca(1), one Ca(3), one Ca(5), and one Ge(2) atom to form a mixture of distorted corner and edge-sharing OCa3Ge tetrahedra. In the eighth O site, O(8) is bonded to one Ca(1), one Ca(2), one Ca(4), and one Ge(1) atom to form a mixture of distorted corner and edge-sharing OCa3Ge trigonal pyramids. In the ninth O site, O(9) is bonded to one Ca(1), one Ca(3), one Ca(4), and one Ge(1) atom to form a mixture of distorted corner and edge-sharing OCa3Ge tetrahedra. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Ca(3), two equivalent Ca(4), and one Ge(1) atom. In the eleventh O site, O(11) is bonded in a 5-coordinate geometry to one Ca(2), one Ca(3), two equivalent Ca(5), and one Ge(3) atom. is represented by the CIF card [CIF]
data_Ca5Ge3O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.973
_cell_length_b   6.996
_cell_length_c   11.033
_cell_angle_alpha   85.412
_cell_angle_beta   84.609
_cell_angle_gamma   77.548
_symmetry_Int_Tables_number   1
_cell_volume   522.239
_cell_formula_units_Z   2
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
  Ca  Ca0  1  0.005  0.031  0.243  1.0
  Ca  Ca1  1  0.076  0.451  0.754  1.0
  Ca  Ca2  1  0.458  0.094  0.767  1.0
  Ca  Ca3  1  0.289  0.702  0.004  1.0
  Ca  Ca4  1  0.318  0.674  0.494  1.0
  Ca  Ca5  1  0.682  0.326  0.506  1.0
  Ca  Ca6  1  0.711  0.298  0.996  1.0
  Ca  Ca7  1  0.542  0.906  0.233  1.0
  Ca  Ca8  1  0.924  0.549  0.246  1.0
  Ca  Ca9  1  0.995  0.969  0.757  1.0
  Ge  Ge10  1  0.207  0.214  0.016  1.0
  Ge  Ge11  1  0.194  0.184  0.464  1.0
  Ge  Ge12  1  0.453  0.428  0.267  1.0
  Ge  Ge13  1  0.547  0.572  0.733  1.0
  Ge  Ge14  1  0.806  0.816  0.536  1.0
  Ge  Ge15  1  0.793  0.786  0.984  1.0
  O  O16  1  0.164  0.159  0.621  1.0
  O  O17  1  0.133  0.152  0.877  1.0
  O  O18  1  0.365  0.343  0.423  1.0
  O  O19  1  0.600  0.223  0.205  1.0
  O  O20  1  0.025  0.712  0.606  1.0
  O  O21  1  0.247  0.580  0.211  1.0
  O  O22  1  0.716  0.033  0.612  1.0
  O  O23  1  0.010  0.687  0.895  1.0
  O  O24  1  0.706  0.006  0.897  1.0
  O  O25  1  0.373  0.362  0.963  1.0
  O  O26  1  0.409  0.426  0.669  1.0
  O  O27  1  0.591  0.574  0.331  1.0
  O  O28  1  0.627  0.638  0.037  1.0
  O  O29  1  0.294  0.994  0.103  1.0
  O  O30  1  0.990  0.313  0.105  1.0
  O  O31  1  0.284  0.967  0.388  1.0
  O  O32  1  0.753  0.420  0.789  1.0
  O  O33  1  0.975  0.288  0.394  1.0
  O  O34  1  0.400  0.777  0.795  1.0
  O  O35  1  0.635  0.657  0.577  1.0
  O  O36  1  0.867  0.848  0.123  1.0
  O  O37  1  0.836  0.841  0.379  1.0
[/CIF]
.
The material described by Ca5Ge3O11 crystallizes in the triclinic P-1 space group. There are five inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(4), one O(5), one O(7), one O(8), and one O(9) atom. In the second Ca site, Ca(2) is bonded to one O(1), one O(11), one O(2), one O(5), one O(6), and one O(8) atom to form distorted CaO6 octahedra that share corners with two equivalent Ca(4)O6 octahedra, corners with two equivalent Ge(1)O4 tetrahedra, corners with two equivalent Ge(2)O4 tetrahedra, and corners with two equivalent Ge(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 66-73°. In the third Ca site, Ca(3) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(11), one O(2), one O(4), one O(7), and one O(9) atom. In the fourth Ca site, Ca(4) is bonded to one O(4), one O(6), one O(8), one O(9), and two equivalent O(10) atoms to form distorted CaO6 octahedra that share corners with two equivalent Ca(2)O6 octahedra, corners with two equivalent Ge(3)O4 tetrahedra, corners with four equivalent Ge(1)O4 tetrahedra, and  an edgeedge with one Ca(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 66-73°. In the fifth Ca site, Ca(5) is bonded in a 6-coordinate geometry to one O(5), one O(7), two equivalent O(11), and two equivalent O(3) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(10), one O(2), one O(8), and one O(9) atom to form GeO4 tetrahedra that share corners with two equivalent Ca(2)O6 octahedra and corners with four equivalent Ca(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-75°. In the second Ge site, Ge(2) is bonded to one O(1), one O(3), one O(5), and one O(7) atom to form GeO4 tetrahedra that share corners with two equivalent Ca(2)O6 octahedra and  a cornercorner with one Ge(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-57°. In the third Ge site, Ge(3) is bonded to one O(11), one O(3), one O(4), and one O(6) atom to form distorted GeO4 tetrahedra that share corners with two equivalent Ca(2)O6 octahedra, corners with two equivalent Ca(4)O6 octahedra, and  a cornercorner with one Ge(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-69°. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Ca(1), one Ca(2), one Ca(3), and one Ge(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Ca(3), and one Ge(1) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to two equivalent Ca(5), one Ge(2), and one Ge(3) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(3), one Ca(4), and one Ge(3) atom. In the fifth O site, O(5) is bonded to one Ca(1), one Ca(2), one Ca(5), and one Ge(2) atom to form a mixture of distorted corner and edge-sharing OCa3Ge tetrahedra. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Ca(2), one Ca(4), and one Ge(3) atom. In the seventh O site, O(7) is bonded to one Ca(1), one Ca(3), one Ca(5), and one Ge(2) atom to form a mixture of distorted corner and edge-sharing OCa3Ge tetrahedra. In the eighth O site, O(8) is bonded to one Ca(1), one Ca(2), one Ca(4), and one Ge(1) atom to form a mixture of distorted corner and edge-sharing OCa3Ge trigonal pyramids. In the ninth O site, O(9) is bonded to one Ca(1), one Ca(3), one Ca(4), and one Ge(1) atom to form a mixture of distorted corner and edge-sharing OCa3Ge tetrahedra. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Ca(3), two equivalent Ca(4), and one Ge(1) atom. In the eleventh O site, O(11) is bonded in a 5-coordinate geometry to one Ca(2), one Ca(3), two equivalent Ca(5), and one Ge(3) atom. is represented by the CIF card [CIF]
data_Ca5Ge3O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.973
_cell_length_b   6.996
_cell_length_c   11.033
_cell_angle_alpha   85.412
_cell_angle_beta   84.609
_cell_angle_gamma   77.548
_symmetry_Int_Tables_number   1
_cell_volume   522.239
_cell_formula_units_Z   2
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
  Ca  Ca0  1  0.005  0.031  0.243  1.0
  Ca  Ca1  1  0.076  0.451  0.754  1.0
  Ca  Ca2  1  0.458  0.094  0.767  1.0
  Ca  Ca3  1  0.289  0.702  0.004  1.0
  Ca  Ca4  1  0.318  0.674  0.494  1.0
  Ca  Ca5  1  0.682  0.326  0.506  1.0
  Ca  Ca6  1  0.711  0.298  0.996  1.0
  Ca  Ca7  1  0.542  0.906  0.233  1.0
  Ca  Ca8  1  0.924  0.549  0.246  1.0
  Ca  Ca9  1  0.995  0.969  0.757  1.0
  Ge  Ge10  1  0.207  0.214  0.016  1.0
  Ge  Ge11  1  0.194  0.184  0.464  1.0
  Ge  Ge12  1  0.453  0.428  0.267  1.0
  Ge  Ge13  1  0.547  0.572  0.733  1.0
  Ge  Ge14  1  0.806  0.816  0.536  1.0
  Ge  Ge15  1  0.793  0.786  0.984  1.0
  O  O16  1  0.164  0.159  0.621  1.0
  O  O17  1  0.133  0.152  0.877  1.0
  O  O18  1  0.365  0.343  0.423  1.0
  O  O19  1  0.600  0.223  0.205  1.0
  O  O20  1  0.025  0.712  0.606  1.0
  O  O21  1  0.247  0.580  0.211  1.0
  O  O22  1  0.716  0.033  0.612  1.0
  O  O23  1  0.010  0.687  0.895  1.0
  O  O24  1  0.706  0.006  0.897  1.0
  O  O25  1  0.373  0.362  0.963  1.0
  O  O26  1  0.409  0.426  0.669  1.0
  O  O27  1  0.591  0.574  0.331  1.0
  O  O28  1  0.627  0.638  0.037  1.0
  O  O29  1  0.294  0.994  0.103  1.0
  O  O30  1  0.990  0.313  0.105  1.0
  O  O31  1  0.284  0.967  0.388  1.0
  O  O32  1  0.753  0.420  0.789  1.0
  O  O33  1  0.975  0.288  0.394  1.0
  O  O34  1  0.400  0.777  0.795  1.0
  O  O35  1  0.635  0.657  0.577  1.0
  O  O36  1  0.867  0.848  0.123  1.0
  O  O37  1  0.836  0.841  0.379  1.0
[/CIF]
.