The crystal structure described by K2Mo3Al(P2O7)4 crystallizes in the triclinic P-1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to two equivalent P(2), two equivalent O(12), and two equivalent O(5) atoms. In the second K site, K(2) is bonded in a 6-coordinate geometry to two equivalent P(1), two equivalent O(11), and two equivalent O(6) atoms. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded in a distorted linear geometry to one O(3) and one O(4) atom. In the second Mo site, Mo(2) is bonded in a linear geometry to two equivalent O(13) atoms. Al(1) is bonded in a linear geometry to two equivalent O(14) atoms. There are four inequivalent P sites. In the first P site, P(1) is bonded in a 4-coordinate geometry to one K(2), one O(1), one O(7), and one O(9) atom. In the second P site, P(2) is bonded in a 4-coordinate geometry to one K(1), one O(10), one O(2), and one O(8) atom. In the third P site, P(3) is bonded in a distorted T-shaped geometry to one O(13), one O(3), and one O(8) atom. In the fourth P site, P(4) is bonded in a 3-coordinate geometry to one O(14), one O(4), and one O(7) atom. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one P(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one P(2) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Mo(1) and one P(3) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Mo(1) and one P(4) atom. In the fifth O site, O(5) is bonded in a distorted water-like geometry to one K(1) and one O(6) atom. In the sixth O site, O(6) is bonded in a distorted water-like geometry to one K(2) and one O(5) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one P(1) and one P(4) atom. In the eighth O site, O(8) is bonded in a distorted water-like geometry to one P(2) and one P(3) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one P(1) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one P(2) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one K(2) atom. In the twelfth O site, O(12) is bonded in a distorted single-bond geometry to one K(1) atom. In the thirteenth O site, O(13) is bonded in a distorted water-like geometry to one Mo(2) and one P(3) atom. In the fourteenth O site, O(14) is bonded in a water-like geometry to one Al(1) and one P(4) atom. is represented by the CIF file [CIF]
data_K2AlMo3(P2O7)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.682
_cell_length_b   9.335
_cell_length_c   9.746
_cell_angle_alpha   117.952
_cell_angle_beta   103.251
_cell_angle_gamma   99.991
_symmetry_Int_Tables_number   1
_cell_volume   567.989
_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
  K  K0  1  0.000  0.500  0.000  1.0
  K  K1  1  0.500  0.500  0.500  1.0
  Al  Al2  1  0.000  0.500  0.500  1.0
  Mo  Mo3  1  0.248  0.998  0.752  1.0
  Mo  Mo4  1  0.752  0.002  0.248  1.0
  Mo  Mo5  1  0.500  0.500  0.000  1.0
  P  P6  1  0.414  0.196  0.344  1.0
  P  P7  1  0.919  0.202  0.835  1.0
  P  P8  1  0.586  0.804  0.656  1.0
  P  P9  1  0.081  0.798  0.165  1.0
  P  P10  1  0.570  0.257  0.813  1.0
  P  P11  1  0.057  0.256  0.328  1.0
  P  P12  1  0.430  0.743  0.187  1.0
  P  P13  1  0.943  0.744  0.672  1.0
  O  O14  1  0.388  0.190  0.508  1.0
  O  O15  1  0.892  0.195  0.001  1.0
  O  O16  1  0.612  0.810  0.492  1.0
  O  O17  1  0.108  0.805  0.999  1.0
  O  O18  1  0.387  0.160  0.817  1.0
  O  O19  1  0.882  0.156  0.326  1.0
  O  O20  1  0.613  0.840  0.183  1.0
  O  O21  1  0.118  0.844  0.674  1.0
  O  O22  1  0.802  0.598  0.850  1.0
  O  O23  1  0.284  0.595  0.357  1.0
  O  O24  1  0.198  0.402  0.150  1.0
  O  O25  1  0.716  0.405  0.643  1.0
  O  O26  1  0.192  0.145  0.358  1.0
  O  O27  1  0.694  0.142  0.856  1.0
  O  O28  1  0.808  0.855  0.642  1.0
  O  O29  1  0.306  0.858  0.144  1.0
  O  O30  1  0.499  0.071  0.305  1.0
  O  O31  1  0.004  0.074  0.802  1.0
  O  O32  1  0.501  0.929  0.695  1.0
  O  O33  1  0.996  0.926  0.198  1.0
  O  O34  1  0.538  0.374  0.206  1.0
  O  O35  1  0.034  0.379  0.694  1.0
  O  O36  1  0.462  0.626  0.794  1.0
  O  O37  1  0.966  0.621  0.306  1.0
  O  O38  1  0.496  0.305  0.955  1.0
  O  O39  1  0.993  0.316  0.457  1.0
  O  O40  1  0.504  0.695  0.045  1.0
  O  O41  1  0.007  0.684  0.543  1.0
[/CIF]
.
The crystal structure described by K2Mo3Al(P2O7)4 crystallizes in the triclinic P-1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to two equivalent P(2), two equivalent O(12), and two equivalent O(5) atoms. In the second K site, K(2) is bonded in a 6-coordinate geometry to two equivalent P(1), two equivalent O(11), and two equivalent O(6) atoms. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded in a distorted linear geometry to one O(3) and one O(4) atom. In the second Mo site, Mo(2) is bonded in a linear geometry to two equivalent O(13) atoms. Al(1) is bonded in a linear geometry to two equivalent O(14) atoms. There are four inequivalent P sites. In the first P site, P(1) is bonded in a 4-coordinate geometry to one K(2), one O(1), one O(7), and one O(9) atom. In the second P site, P(2) is bonded in a 4-coordinate geometry to one K(1), one O(10), one O(2), and one O(8) atom. In the third P site, P(3) is bonded in a distorted T-shaped geometry to one O(13), one O(3), and one O(8) atom. In the fourth P site, P(4) is bonded in a 3-coordinate geometry to one O(14), one O(4), and one O(7) atom. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one P(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one P(2) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Mo(1) and one P(3) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Mo(1) and one P(4) atom. In the fifth O site, O(5) is bonded in a distorted water-like geometry to one K(1) and one O(6) atom. In the sixth O site, O(6) is bonded in a distorted water-like geometry to one K(2) and one O(5) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one P(1) and one P(4) atom. In the eighth O site, O(8) is bonded in a distorted water-like geometry to one P(2) and one P(3) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one P(1) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one P(2) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one K(2) atom. In the twelfth O site, O(12) is bonded in a distorted single-bond geometry to one K(1) atom. In the thirteenth O site, O(13) is bonded in a distorted water-like geometry to one Mo(2) and one P(3) atom. In the fourteenth O site, O(14) is bonded in a water-like geometry to one Al(1) and one P(4) atom. is represented by the CIF file [CIF]
data_K2AlMo3(P2O7)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.682
_cell_length_b   9.335
_cell_length_c   9.746
_cell_angle_alpha   117.952
_cell_angle_beta   103.251
_cell_angle_gamma   99.991
_symmetry_Int_Tables_number   1
_cell_volume   567.989
_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
  K  K0  1  0.000  0.500  0.000  1.0
  K  K1  1  0.500  0.500  0.500  1.0
  Al  Al2  1  0.000  0.500  0.500  1.0
  Mo  Mo3  1  0.248  0.998  0.752  1.0
  Mo  Mo4  1  0.752  0.002  0.248  1.0
  Mo  Mo5  1  0.500  0.500  0.000  1.0
  P  P6  1  0.414  0.196  0.344  1.0
  P  P7  1  0.919  0.202  0.835  1.0
  P  P8  1  0.586  0.804  0.656  1.0
  P  P9  1  0.081  0.798  0.165  1.0
  P  P10  1  0.570  0.257  0.813  1.0
  P  P11  1  0.057  0.256  0.328  1.0
  P  P12  1  0.430  0.743  0.187  1.0
  P  P13  1  0.943  0.744  0.672  1.0
  O  O14  1  0.388  0.190  0.508  1.0
  O  O15  1  0.892  0.195  0.001  1.0
  O  O16  1  0.612  0.810  0.492  1.0
  O  O17  1  0.108  0.805  0.999  1.0
  O  O18  1  0.387  0.160  0.817  1.0
  O  O19  1  0.882  0.156  0.326  1.0
  O  O20  1  0.613  0.840  0.183  1.0
  O  O21  1  0.118  0.844  0.674  1.0
  O  O22  1  0.802  0.598  0.850  1.0
  O  O23  1  0.284  0.595  0.357  1.0
  O  O24  1  0.198  0.402  0.150  1.0
  O  O25  1  0.716  0.405  0.643  1.0
  O  O26  1  0.192  0.145  0.358  1.0
  O  O27  1  0.694  0.142  0.856  1.0
  O  O28  1  0.808  0.855  0.642  1.0
  O  O29  1  0.306  0.858  0.144  1.0
  O  O30  1  0.499  0.071  0.305  1.0
  O  O31  1  0.004  0.074  0.802  1.0
  O  O32  1  0.501  0.929  0.695  1.0
  O  O33  1  0.996  0.926  0.198  1.0
  O  O34  1  0.538  0.374  0.206  1.0
  O  O35  1  0.034  0.379  0.694  1.0
  O  O36  1  0.462  0.626  0.794  1.0
  O  O37  1  0.966  0.621  0.306  1.0
  O  O38  1  0.496  0.305  0.955  1.0
  O  O39  1  0.993  0.316  0.457  1.0
  O  O40  1  0.504  0.695  0.045  1.0
  O  O41  1  0.007  0.684  0.543  1.0
[/CIF]
.