The material described by Ca5W5Si6O17 crystallizes in the triclinic P1 space group. There are five inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 6-coordinate geometry to one W(3), one O(12), one O(14), one O(15), one O(17), one O(6), and one O(8) atom. In the second Ca site, Ca(2) is bonded in a 7-coordinate geometry to one O(1), one O(12), one O(13), one O(14), one O(16), one O(17), and one O(8) atom. In the third Ca site, Ca(3) is bonded in a 6-coordinate geometry to one W(2), one O(13), one O(14), one O(15), one O(16), one O(6), and one O(8) atom. In the fourth Ca site, Ca(4) is bonded in a 6-coordinate geometry to one O(12), one O(13), one O(15), one O(17), one O(5), and one O(6) atom. In the fifth Ca site, Ca(5) is bonded in a 3-coordinate geometry to one W(1), one W(2), one W(3), one W(5), one O(1), one O(2), and one O(7) atom. There are five inequivalent W sites. In the first W site, W(1) is bonded in a distorted single-bond geometry to one Ca(5) and one W(3) atom. In the second W site, W(2) is bonded in a distorted water-like geometry to one Ca(3) and one Ca(5) atom. In the third W site, W(3) is bonded in a 5-coordinate geometry to one Ca(1), one Ca(5), one W(1), one W(4), and one W(5) atom. In the fourth W site, W(4) is bonded in a distorted single-bond geometry to one W(3) and one O(5) atom. In the fifth W site, W(5) is bonded in a distorted single-bond geometry to one Ca(5) and one W(3) atom. There are six inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(13), one O(16), one O(2), and one O(7) atom to form corner-sharing SiO4 tetrahedra. In the second Si site, Si(2) is bonded to one O(14), one O(2), one O(4), and one O(8) atom to form corner-sharing SiO4 tetrahedra. In the third Si site, Si(3) is bonded to one O(1), one O(3), one O(4), and one O(7) atom to form corner-sharing SiO4 tetrahedra. In the fourth Si site, Si(4) is bonded to one O(11), one O(15), one O(6), and one O(9) atom to form corner-sharing SiO4 tetrahedra. In the fifth Si site, Si(5) is bonded to one O(10), one O(3), one O(5), and one O(9) atom to form corner-sharing SiO4 tetrahedra. In the sixth Si site, Si(6) is bonded to one O(10), one O(11), one O(12), and one O(17) atom to form corner-sharing SiO4 tetrahedra. There are seventeen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Ca(2), one Ca(5), and one Si(3) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Ca(5), one Si(1), and one Si(2) atom. In the third O site, O(3) is bonded in a linear geometry to one Si(3) and one Si(5) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Si(2) and one Si(3) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Ca(4), one W(4), and one Si(5) atom. In the sixth O site, O(6) is bonded to one Ca(1), one Ca(3), one Ca(4), and one Si(4) atom to form a mixture of distorted corner and edge-sharing OCa3Si trigonal pyramids. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Ca(5), one Si(1), and one Si(3) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Ca(3), and one Si(2) atom. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to one Si(4) and one Si(5) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to one Si(5) and one Si(6) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one Si(4) and one Si(6) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Ca(4), and one Si(6) atom. In the thirteenth O site, O(13) is bonded to one Ca(2), one Ca(3), one Ca(4), and one Si(1) atom to form a mixture of distorted corner and edge-sharing OCa3Si tetrahedra. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Ca(3), and one Si(2) atom. In the fifteenth O site, O(15) is bonded to one Ca(1), one Ca(3), one Ca(4), and one Si(4) atom to form a mixture of distorted corner and edge-sharing OCa3Si tetrahedra. In the sixteenth O site, O(16) is bonded in a 3-coordinate geometry to one Ca(2), one Ca(3), and one Si(1) atom. In the seventeenth O site, O(17) is bonded to one Ca(1), one Ca(2), one Ca(4), and one Si(6) atom to form a mixture of distorted corner and edge-sharing OCa3Si tetrahedra. is represented by the CIF card [CIF]
data_Ca5Si6W5O17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.045
_cell_length_b   6.849
_cell_length_c   11.986
_cell_angle_alpha   88.675
_cell_angle_beta   78.911
_cell_angle_gamma   65.517
_symmetry_Int_Tables_number   1
_cell_volume   515.489
_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
  Ca  Ca0  1  0.632  0.083  0.957  1.0
  Ca  Ca1  1  0.181  0.056  0.798  1.0
  Ca  Ca2  1  0.681  0.575  0.828  1.0
  Ca  Ca3  1  0.134  0.606  1.000  1.0
  Ca  Ca4  1  0.313  0.243  0.511  1.0
  Si  Si5  1  0.260  0.517  0.718  1.0
  Si  Si6  1  0.685  0.090  0.706  1.0
  Si  Si7  1  0.119  0.861  0.539  1.0
  Si  Si8  1  0.640  0.570  0.081  1.0
  Si  Si9  1  0.221  0.807  0.254  1.0
  Si  Si10  1  0.061  0.146  0.071  1.0
  W  W11  1  0.688  0.834  0.381  1.0
  W  W12  1  0.822  0.526  0.560  1.0
  W  W13  1  0.526  0.157  0.219  1.0
  W  W14  1  0.072  0.424  0.307  1.0
  W  W15  1  0.716  0.305  0.384  1.0
  O  O16  1  0.219  0.998  0.595  1.0
  O  O17  1  0.476  0.287  0.665  1.0
  O  O18  1  0.173  0.838  0.396  1.0
  O  O19  1  0.857  0.958  0.589  1.0
  O  O20  1  0.125  0.658  0.202  1.0
  O  O21  1  0.520  0.475  0.008  1.0
  O  O22  1  0.212  0.615  0.590  1.0
  O  O23  1  0.585  0.941  0.782  1.0
  O  O24  1  0.481  0.702  0.203  1.0
  O  O25  1  0.124  0.038  0.194  1.0
  O  O26  1  0.846  0.372  0.120  1.0
  O  O27  1  0.243  0.214  0.999  1.0
  O  O28  1  0.307  0.664  0.802  1.0
  O  O29  1  0.791  0.189  0.786  1.0
  O  O30  1  0.737  0.718  0.002  1.0
  O  O31  1  0.075  0.442  0.776  1.0
  O  O32  1  0.005  0.993  0.993  1.0
[/CIF]
.
The material described by Ca5W5Si6O17 crystallizes in the triclinic P1 space group. There are five inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 6-coordinate geometry to one W(3), one O(12), one O(14), one O(15), one O(17), one O(6), and one O(8) atom. In the second Ca site, Ca(2) is bonded in a 7-coordinate geometry to one O(1), one O(12), one O(13), one O(14), one O(16), one O(17), and one O(8) atom. In the third Ca site, Ca(3) is bonded in a 6-coordinate geometry to one W(2), one O(13), one O(14), one O(15), one O(16), one O(6), and one O(8) atom. In the fourth Ca site, Ca(4) is bonded in a 6-coordinate geometry to one O(12), one O(13), one O(15), one O(17), one O(5), and one O(6) atom. In the fifth Ca site, Ca(5) is bonded in a 3-coordinate geometry to one W(1), one W(2), one W(3), one W(5), one O(1), one O(2), and one O(7) atom. There are five inequivalent W sites. In the first W site, W(1) is bonded in a distorted single-bond geometry to one Ca(5) and one W(3) atom. In the second W site, W(2) is bonded in a distorted water-like geometry to one Ca(3) and one Ca(5) atom. In the third W site, W(3) is bonded in a 5-coordinate geometry to one Ca(1), one Ca(5), one W(1), one W(4), and one W(5) atom. In the fourth W site, W(4) is bonded in a distorted single-bond geometry to one W(3) and one O(5) atom. In the fifth W site, W(5) is bonded in a distorted single-bond geometry to one Ca(5) and one W(3) atom. There are six inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(13), one O(16), one O(2), and one O(7) atom to form corner-sharing SiO4 tetrahedra. In the second Si site, Si(2) is bonded to one O(14), one O(2), one O(4), and one O(8) atom to form corner-sharing SiO4 tetrahedra. In the third Si site, Si(3) is bonded to one O(1), one O(3), one O(4), and one O(7) atom to form corner-sharing SiO4 tetrahedra. In the fourth Si site, Si(4) is bonded to one O(11), one O(15), one O(6), and one O(9) atom to form corner-sharing SiO4 tetrahedra. In the fifth Si site, Si(5) is bonded to one O(10), one O(3), one O(5), and one O(9) atom to form corner-sharing SiO4 tetrahedra. In the sixth Si site, Si(6) is bonded to one O(10), one O(11), one O(12), and one O(17) atom to form corner-sharing SiO4 tetrahedra. There are seventeen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Ca(2), one Ca(5), and one Si(3) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Ca(5), one Si(1), and one Si(2) atom. In the third O site, O(3) is bonded in a linear geometry to one Si(3) and one Si(5) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Si(2) and one Si(3) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Ca(4), one W(4), and one Si(5) atom. In the sixth O site, O(6) is bonded to one Ca(1), one Ca(3), one Ca(4), and one Si(4) atom to form a mixture of distorted corner and edge-sharing OCa3Si trigonal pyramids. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Ca(5), one Si(1), and one Si(3) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Ca(3), and one Si(2) atom. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to one Si(4) and one Si(5) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to one Si(5) and one Si(6) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one Si(4) and one Si(6) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Ca(4), and one Si(6) atom. In the thirteenth O site, O(13) is bonded to one Ca(2), one Ca(3), one Ca(4), and one Si(1) atom to form a mixture of distorted corner and edge-sharing OCa3Si tetrahedra. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Ca(3), and one Si(2) atom. In the fifteenth O site, O(15) is bonded to one Ca(1), one Ca(3), one Ca(4), and one Si(4) atom to form a mixture of distorted corner and edge-sharing OCa3Si tetrahedra. In the sixteenth O site, O(16) is bonded in a 3-coordinate geometry to one Ca(2), one Ca(3), and one Si(1) atom. In the seventeenth O site, O(17) is bonded to one Ca(1), one Ca(2), one Ca(4), and one Si(6) atom to form a mixture of distorted corner and edge-sharing OCa3Si tetrahedra. is represented by the CIF card [CIF]
data_Ca5Si6W5O17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.045
_cell_length_b   6.849
_cell_length_c   11.986
_cell_angle_alpha   88.675
_cell_angle_beta   78.911
_cell_angle_gamma   65.517
_symmetry_Int_Tables_number   1
_cell_volume   515.489
_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
  Ca  Ca0  1  0.632  0.083  0.957  1.0
  Ca  Ca1  1  0.181  0.056  0.798  1.0
  Ca  Ca2  1  0.681  0.575  0.828  1.0
  Ca  Ca3  1  0.134  0.606  1.000  1.0
  Ca  Ca4  1  0.313  0.243  0.511  1.0
  Si  Si5  1  0.260  0.517  0.718  1.0
  Si  Si6  1  0.685  0.090  0.706  1.0
  Si  Si7  1  0.119  0.861  0.539  1.0
  Si  Si8  1  0.640  0.570  0.081  1.0
  Si  Si9  1  0.221  0.807  0.254  1.0
  Si  Si10  1  0.061  0.146  0.071  1.0
  W  W11  1  0.688  0.834  0.381  1.0
  W  W12  1  0.822  0.526  0.560  1.0
  W  W13  1  0.526  0.157  0.219  1.0
  W  W14  1  0.072  0.424  0.307  1.0
  W  W15  1  0.716  0.305  0.384  1.0
  O  O16  1  0.219  0.998  0.595  1.0
  O  O17  1  0.476  0.287  0.665  1.0
  O  O18  1  0.173  0.838  0.396  1.0
  O  O19  1  0.857  0.958  0.589  1.0
  O  O20  1  0.125  0.658  0.202  1.0
  O  O21  1  0.520  0.475  0.008  1.0
  O  O22  1  0.212  0.615  0.590  1.0
  O  O23  1  0.585  0.941  0.782  1.0
  O  O24  1  0.481  0.702  0.203  1.0
  O  O25  1  0.124  0.038  0.194  1.0
  O  O26  1  0.846  0.372  0.120  1.0
  O  O27  1  0.243  0.214  0.999  1.0
  O  O28  1  0.307  0.664  0.802  1.0
  O  O29  1  0.791  0.189  0.786  1.0
  O  O30  1  0.737  0.718  0.002  1.0
  O  O31  1  0.075  0.442  0.776  1.0
  O  O32  1  0.005  0.993  0.993  1.0
[/CIF]
.