The crystal structure described by Na2CaGe6O14 is Esseneite-like structured and crystallizes in the monoclinic C2 space group. Na(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(5), one O(7), two equivalent O(4), and two equivalent O(6) atoms. Ca(1) is bonded in a 8-coordinate geometry to two equivalent O(3), two equivalent O(4), two equivalent O(5), and two equivalent O(7) atoms. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(2), one O(3), one O(6), and one O(7) atom to form GeO4 tetrahedra that share corners with two equivalent Ge(3)O6 octahedra and corners with two equivalent Ge(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 60-62°. In the second Ge site, Ge(2) is bonded to two equivalent O(1) and two equivalent O(5) atoms to form GeO4 tetrahedra that share corners with two equivalent Ge(3)O6 octahedra and corners with two equivalent Ge(4)O4 tetrahedra. The corner-sharing octahedral tilt angles are 61°. In the third Ge site, Ge(3) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing GeO6 octahedra. In the fourth Ge site, Ge(4) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form corner-sharing GeO4 tetrahedra. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Na(1), one Ge(2), and one Ge(3) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Na(1), one Ge(1), and one Ge(3) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Ca(1), one Ge(1), and one Ge(3) atom. In the fourth O site, O(4) is bonded to two equivalent Na(1), one Ca(1), and one Ge(4) atom to form distorted corner-sharing ONa2CaGe tetrahedra. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Na(1), one Ca(1), one Ge(2), and one Ge(4) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Ge(1), and one Ge(4) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Na(1), one Ca(1), one Ge(1), and one Ge(4) atom. is represented by the CIF file [CIF]
data_Na2Ca(Ge3O7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.245
_cell_length_b   8.245
_cell_length_c   4.931
_cell_angle_alpha   89.858
_cell_angle_beta   89.858
_cell_angle_gamma   60.335
_symmetry_Int_Tables_number   1
_cell_volume   291.257
_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
  Na  Na0  1  0.001  0.423  1.000  1.0
  Na  Na1  1  0.577  0.999  0.000  1.0
  Ca  Ca2  1  0.421  0.579  0.000  1.0
  Ge  Ge3  1  0.001  0.753  0.502  1.0
  Ge  Ge4  1  0.247  0.999  0.498  1.0
  Ge  Ge5  1  0.756  0.244  0.500  1.0
  Ge  Ge6  1  0.997  0.003  0.000  1.0
  Ge  Ge7  1  0.334  0.334  0.516  1.0
  Ge  Ge8  1  0.666  0.666  0.484  1.0
  O  O9  1  0.913  0.215  0.764  1.0
  O  O10  1  0.874  0.912  0.764  1.0
  O  O11  1  0.217  0.872  0.768  1.0
  O  O12  1  0.785  0.087  0.236  1.0
  O  O13  1  0.128  0.783  0.232  1.0
  O  O14  1  0.088  0.126  0.236  1.0
  O  O15  1  0.340  0.347  0.172  1.0
  O  O16  1  0.653  0.660  0.828  1.0
  O  O17  1  0.689  0.460  0.319  1.0
  O  O18  1  0.848  0.692  0.328  1.0
  O  O19  1  0.457  0.839  0.317  1.0
  O  O20  1  0.540  0.311  0.681  1.0
  O  O21  1  0.161  0.543  0.683  1.0
  O  O22  1  0.308  0.152  0.672  1.0
[/CIF]
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The crystal structure described by Na2CaGe6O14 is Esseneite-like structured and crystallizes in the monoclinic C2 space group. Na(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(5), one O(7), two equivalent O(4), and two equivalent O(6) atoms. Ca(1) is bonded in a 8-coordinate geometry to two equivalent O(3), two equivalent O(4), two equivalent O(5), and two equivalent O(7) atoms. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(2), one O(3), one O(6), and one O(7) atom to form GeO4 tetrahedra that share corners with two equivalent Ge(3)O6 octahedra and corners with two equivalent Ge(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 60-62°. In the second Ge site, Ge(2) is bonded to two equivalent O(1) and two equivalent O(5) atoms to form GeO4 tetrahedra that share corners with two equivalent Ge(3)O6 octahedra and corners with two equivalent Ge(4)O4 tetrahedra. The corner-sharing octahedral tilt angles are 61°. In the third Ge site, Ge(3) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing GeO6 octahedra. In the fourth Ge site, Ge(4) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form corner-sharing GeO4 tetrahedra. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Na(1), one Ge(2), and one Ge(3) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Na(1), one Ge(1), and one Ge(3) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Ca(1), one Ge(1), and one Ge(3) atom. In the fourth O site, O(4) is bonded to two equivalent Na(1), one Ca(1), and one Ge(4) atom to form distorted corner-sharing ONa2CaGe tetrahedra. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Na(1), one Ca(1), one Ge(2), and one Ge(4) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Ge(1), and one Ge(4) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Na(1), one Ca(1), one Ge(1), and one Ge(4) atom. is represented by the CIF file [CIF]
data_Na2Ca(Ge3O7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.245
_cell_length_b   8.245
_cell_length_c   4.931
_cell_angle_alpha   89.858
_cell_angle_beta   89.858
_cell_angle_gamma   60.335
_symmetry_Int_Tables_number   1
_cell_volume   291.257
_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
  Na  Na0  1  0.001  0.423  1.000  1.0
  Na  Na1  1  0.577  0.999  0.000  1.0
  Ca  Ca2  1  0.421  0.579  0.000  1.0
  Ge  Ge3  1  0.001  0.753  0.502  1.0
  Ge  Ge4  1  0.247  0.999  0.498  1.0
  Ge  Ge5  1  0.756  0.244  0.500  1.0
  Ge  Ge6  1  0.997  0.003  0.000  1.0
  Ge  Ge7  1  0.334  0.334  0.516  1.0
  Ge  Ge8  1  0.666  0.666  0.484  1.0
  O  O9  1  0.913  0.215  0.764  1.0
  O  O10  1  0.874  0.912  0.764  1.0
  O  O11  1  0.217  0.872  0.768  1.0
  O  O12  1  0.785  0.087  0.236  1.0
  O  O13  1  0.128  0.783  0.232  1.0
  O  O14  1  0.088  0.126  0.236  1.0
  O  O15  1  0.340  0.347  0.172  1.0
  O  O16  1  0.653  0.660  0.828  1.0
  O  O17  1  0.689  0.460  0.319  1.0
  O  O18  1  0.848  0.692  0.328  1.0
  O  O19  1  0.457  0.839  0.317  1.0
  O  O20  1  0.540  0.311  0.681  1.0
  O  O21  1  0.161  0.543  0.683  1.0
  O  O22  1  0.308  0.152  0.672  1.0
[/CIF]
.