The material structure described by (Ca3As2O17)2O2 crystallizes in the triclinic P-1 space group. The structure consists of one 7782-44-7 molecule inside a Ca3As2O17 framework. In the Ca3As2O17 framework, there are three inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 7-coordinate geometry to one O(10), one O(11), one O(5), one O(6), one O(7), one O(8), and one O(9) atom. In the second Ca site, Ca(2) is bonded in a 7-coordinate geometry to one O(1), one O(11), one O(12), one O(13), one O(3), one O(5), and one O(6) atom. In the third Ca site, Ca(3) is bonded in a 6-coordinate geometry to one O(12), one O(13), one O(15), one O(16), one O(2), and one O(7) atom. There are two inequivalent As sites. In the first As site, As(1) is bonded in a distorted tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. In the second As site, As(2) is bonded in a tetrahedral geometry to one O(5), one O(6), one O(7), and one O(8) atom. There are seventeen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Ca(2) and one As(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Ca(3), one As(1), and one O(12) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Ca(2) and one As(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one As(1) and one O(9) atom. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Ca(1), one Ca(2), and one As(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Ca(1), one Ca(2), and one As(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Ca(1), one Ca(3), and one As(2) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Ca(1) and one As(2) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Ca(1) and one O(4) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Ca(1) and one O(18) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal non-coplanar geometry to one Ca(1), one Ca(2), and one O(18) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Ca(2), one Ca(3), and one O(2) atom. In the thirteenth O site, O(13) is bonded in a bent 120 degrees geometry to one Ca(2) and one Ca(3) atom. In the fourteenth O site, O(15) is bonded in a bent 150 degrees geometry to one Ca(3) and one O(17) atom. In the fifteenth O site, O(16) is bonded in a bent 120 degrees geometry to one Ca(3) and one O(17) atom. In the sixteenth O site, O(17) is bonded in a bent 120 degrees geometry to one O(15) and one O(16) atom. In the seventeenth O site, O(18) is bonded in a bent 120 degrees geometry to one O(10) and one O(11) atom. is represented by the CIF file [CIF]
data_Ca3(AsO9)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.957
_cell_length_b   10.332
_cell_length_c   12.051
_cell_angle_alpha   107.605
_cell_angle_beta   96.453
_cell_angle_gamma   101.988
_symmetry_Int_Tables_number   1
_cell_volume   679.261
_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  0.567  0.780  0.425  1.0
  Ca  Ca1  1  0.433  0.220  0.575  1.0
  Ca  Ca2  1  0.167  0.861  0.668  1.0
  Ca  Ca3  1  0.833  0.139  0.332  1.0
  Ca  Ca4  1  0.377  0.804  0.086  1.0
  Ca  Ca5  1  0.623  0.196  0.914  1.0
  As  As6  1  0.644  0.711  0.756  1.0
  As  As7  1  0.356  0.289  0.244  1.0
  As  As8  1  0.154  0.910  0.367  1.0
  As  As9  1  0.846  0.090  0.633  1.0
  O  O10  1  0.935  0.751  0.773  1.0
  O  O11  1  0.065  0.249  0.227  1.0
  O  O12  1  0.542  0.830  0.885  1.0
  O  O13  1  0.458  0.170  0.115  1.0
  O  O14  1  0.450  0.685  0.636  1.0
  O  O15  1  0.550  0.315  0.364  1.0
  O  O16  1  0.588  0.564  0.830  1.0
  O  O17  1  0.412  0.436  0.170  1.0
  O  O18  1  0.186  0.086  0.392  1.0
  O  O19  1  0.814  0.914  0.608  1.0
  O  O20  1  0.278  0.896  0.500  1.0
  O  O21  1  0.722  0.104  0.500  1.0
  O  O22  1  0.331  0.840  0.274  1.0
  O  O23  1  0.669  0.160  0.726  1.0
  O  O24  1  0.864  0.825  0.322  1.0
  O  O25  1  0.136  0.175  0.678  1.0
  O  O26  1  0.416  0.563  0.236  1.0
  O  O27  1  0.584  0.437  0.764  1.0
  O  O28  1  0.158  0.612  0.441  1.0
  O  O29  1  0.842  0.388  0.559  1.0
  O  O30  1  0.813  0.637  0.479  1.0
  O  O31  1  0.187  0.363  0.521  1.0
  O  O32  1  0.528  0.947  0.848  1.0
  O  O33  1  0.472  0.053  0.152  1.0
  O  O34  1  0.237  0.069  0.838  1.0
  O  O35  1  0.763  0.931  0.162  1.0
  O  O36  1  0.986  0.948  0.016  1.0
  O  O37  1  0.014  0.052  0.984  1.0
  O  O38  1  0.272  0.540  0.969  1.0
  O  O39  1  0.728  0.460  0.031  1.0
  O  O40  1  0.962  0.659  0.032  1.0
  O  O41  1  0.038  0.341  0.968  1.0
  O  O42  1  0.857  0.586  0.095  1.0
  O  O43  1  0.143  0.414  0.905  1.0
  O  O44  1  0.059  0.404  0.603  1.0
  O  O45  1  0.941  0.596  0.397  1.0
[/CIF]
.
The material structure described by (Ca3As2O17)2O2 crystallizes in the triclinic P-1 space group. The structure consists of one 7782-44-7 molecule inside a Ca3As2O17 framework. In the Ca3As2O17 framework, there are three inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 7-coordinate geometry to one O(10), one O(11), one O(5), one O(6), one O(7), one O(8), and one O(9) atom. In the second Ca site, Ca(2) is bonded in a 7-coordinate geometry to one O(1), one O(11), one O(12), one O(13), one O(3), one O(5), and one O(6) atom. In the third Ca site, Ca(3) is bonded in a 6-coordinate geometry to one O(12), one O(13), one O(15), one O(16), one O(2), and one O(7) atom. There are two inequivalent As sites. In the first As site, As(1) is bonded in a distorted tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. In the second As site, As(2) is bonded in a tetrahedral geometry to one O(5), one O(6), one O(7), and one O(8) atom. There are seventeen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Ca(2) and one As(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Ca(3), one As(1), and one O(12) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Ca(2) and one As(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one As(1) and one O(9) atom. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Ca(1), one Ca(2), and one As(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Ca(1), one Ca(2), and one As(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Ca(1), one Ca(3), and one As(2) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Ca(1) and one As(2) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Ca(1) and one O(4) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Ca(1) and one O(18) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal non-coplanar geometry to one Ca(1), one Ca(2), and one O(18) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Ca(2), one Ca(3), and one O(2) atom. In the thirteenth O site, O(13) is bonded in a bent 120 degrees geometry to one Ca(2) and one Ca(3) atom. In the fourteenth O site, O(15) is bonded in a bent 150 degrees geometry to one Ca(3) and one O(17) atom. In the fifteenth O site, O(16) is bonded in a bent 120 degrees geometry to one Ca(3) and one O(17) atom. In the sixteenth O site, O(17) is bonded in a bent 120 degrees geometry to one O(15) and one O(16) atom. In the seventeenth O site, O(18) is bonded in a bent 120 degrees geometry to one O(10) and one O(11) atom. is represented by the CIF file [CIF]
data_Ca3(AsO9)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.957
_cell_length_b   10.332
_cell_length_c   12.051
_cell_angle_alpha   107.605
_cell_angle_beta   96.453
_cell_angle_gamma   101.988
_symmetry_Int_Tables_number   1
_cell_volume   679.261
_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  0.567  0.780  0.425  1.0
  Ca  Ca1  1  0.433  0.220  0.575  1.0
  Ca  Ca2  1  0.167  0.861  0.668  1.0
  Ca  Ca3  1  0.833  0.139  0.332  1.0
  Ca  Ca4  1  0.377  0.804  0.086  1.0
  Ca  Ca5  1  0.623  0.196  0.914  1.0
  As  As6  1  0.644  0.711  0.756  1.0
  As  As7  1  0.356  0.289  0.244  1.0
  As  As8  1  0.154  0.910  0.367  1.0
  As  As9  1  0.846  0.090  0.633  1.0
  O  O10  1  0.935  0.751  0.773  1.0
  O  O11  1  0.065  0.249  0.227  1.0
  O  O12  1  0.542  0.830  0.885  1.0
  O  O13  1  0.458  0.170  0.115  1.0
  O  O14  1  0.450  0.685  0.636  1.0
  O  O15  1  0.550  0.315  0.364  1.0
  O  O16  1  0.588  0.564  0.830  1.0
  O  O17  1  0.412  0.436  0.170  1.0
  O  O18  1  0.186  0.086  0.392  1.0
  O  O19  1  0.814  0.914  0.608  1.0
  O  O20  1  0.278  0.896  0.500  1.0
  O  O21  1  0.722  0.104  0.500  1.0
  O  O22  1  0.331  0.840  0.274  1.0
  O  O23  1  0.669  0.160  0.726  1.0
  O  O24  1  0.864  0.825  0.322  1.0
  O  O25  1  0.136  0.175  0.678  1.0
  O  O26  1  0.416  0.563  0.236  1.0
  O  O27  1  0.584  0.437  0.764  1.0
  O  O28  1  0.158  0.612  0.441  1.0
  O  O29  1  0.842  0.388  0.559  1.0
  O  O30  1  0.813  0.637  0.479  1.0
  O  O31  1  0.187  0.363  0.521  1.0
  O  O32  1  0.528  0.947  0.848  1.0
  O  O33  1  0.472  0.053  0.152  1.0
  O  O34  1  0.237  0.069  0.838  1.0
  O  O35  1  0.763  0.931  0.162  1.0
  O  O36  1  0.986  0.948  0.016  1.0
  O  O37  1  0.014  0.052  0.984  1.0
  O  O38  1  0.272  0.540  0.969  1.0
  O  O39  1  0.728  0.460  0.031  1.0
  O  O40  1  0.962  0.659  0.032  1.0
  O  O41  1  0.038  0.341  0.968  1.0
  O  O42  1  0.857  0.586  0.095  1.0
  O  O43  1  0.143  0.414  0.905  1.0
  O  O44  1  0.059  0.404  0.603  1.0
  O  O45  1  0.941  0.596  0.397  1.0
[/CIF]
.