The structure described by KCoAl(PO4)2 crystallizes in the monoclinic Cc space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(11), one O(12), one O(13), one O(14), one O(15), one O(16), and one O(8) atom. In the second K site, K(2) is bonded in a 6-coordinate geometry to one O(1), one O(16), one O(2), one O(3), one O(4), and one O(5) atom. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(3), and one O(8) atom to form CoO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and corners with two equivalent P(4)O4 tetrahedra. In the second Co site, Co(2) is bonded to one O(10), one O(13), one O(5), and one O(6) atom to form CoO4 trigonal pyramids that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(11), one O(12), one O(4), and one O(7) atom to form AlO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. In the second Al site, Al(2) is bonded to one O(14), one O(15), one O(16), and one O(9) atom to form AlO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(12), one O(15), one O(3), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Al(1)O4 tetrahedra, and corners with two equivalent Al(2)O4 tetrahedra. In the second P site, P(2) is bonded to one O(10), one O(16), one O(4), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Al(2)O4 tetrahedra, and corners with two equivalent Co(2)O4 trigonal pyramids. In the third P site, P(3) is bonded to one O(1), one O(11), one O(13), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O4 tetrahedra, corners with two equivalent Al(1)O4 tetrahedra, and  a cornercorner with one Co(2)O4 trigonal pyramid. In the fourth P site, P(4) is bonded to one O(14), one O(2), one O(5), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Al(2)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, and  a cornercorner with one Co(2)O4 trigonal pyramid. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Co(1), and one P(3) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one K(2), one Co(1), and one P(4) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one K(2), one Co(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one K(2), one Al(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one K(2), one Co(2), and one P(4) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Co(2) and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted linear geometry to one Al(1) and one P(3) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one K(1), one Co(1), and one P(4) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Al(2) and one P(1) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one K(1), one Co(2), and one P(2) atom. In the eleventh O site, O(11) is bonded in a distorted bent 120 degrees geometry to one K(1), one Al(1), and one P(3) atom. In the twelfth O site, O(12) is bonded in a 2-coordinate geometry to one K(1), one Al(1), and one P(1) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one K(1), one Co(2), and one P(3) atom. In the fourteenth O site, O(14) is bonded in a bent 150 degrees geometry to one K(1), one Al(2), and one P(4) atom. In the fifteenth O site, O(15) is bonded in a distorted bent 120 degrees geometry to one K(1), one Al(2), and one P(1) atom. In the sixteenth O site, O(16) is bonded in a distorted bent 150 degrees geometry to one K(1), one K(2), one Al(2), and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_KAlCo(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.443
_cell_length_b   9.443
_cell_length_c   8.863
_cell_angle_alpha   82.582
_cell_angle_beta   82.582
_cell_angle_gamma   88.942
_symmetry_Int_Tables_number   1
_cell_volume   777.062
_cell_formula_units_Z   4
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  0.920  0.452  0.780  1.0
  K  K1  1  0.585  0.065  0.719  1.0
  K  K2  1  0.452  0.920  0.280  1.0
  K  K3  1  0.065  0.585  0.219  1.0
  Al  Al4  1  0.448  0.700  0.952  1.0
  Al  Al5  1  0.192  0.070  0.614  1.0
  Al  Al6  1  0.700  0.448  0.452  1.0
  Al  Al7  1  0.070  0.192  0.114  1.0
  Co  Co8  1  0.937  0.806  0.880  1.0
  Co  Co9  1  0.297  0.539  0.556  1.0
  Co  Co10  1  0.806  0.937  0.380  1.0
  Co  Co11  1  0.539  0.297  0.056  1.0
  P  P12  1  0.214  0.938  0.968  1.0
  P  P13  1  0.278  0.424  0.918  1.0
  P  P14  1  0.578  0.707  0.591  1.0
  P  P15  1  0.065  0.790  0.519  1.0
  P  P16  1  0.938  0.214  0.468  1.0
  P  P17  1  0.424  0.278  0.418  1.0
  P  P18  1  0.707  0.578  0.091  1.0
  P  P19  1  0.790  0.065  0.019  1.0
  O  O20  1  0.851  0.642  0.018  1.0
  O  O21  1  0.833  0.980  0.883  1.0
  O  O22  1  0.102  0.821  0.994  1.0
  O  O23  1  0.323  0.559  0.988  1.0
  O  O24  1  0.657  0.149  0.975  1.0
  O  O25  1  0.403  0.319  0.905  1.0
  O  O26  1  0.535  0.719  0.765  1.0
  O  O27  1  0.969  0.754  0.674  1.0
  O  O28  1  0.221  0.025  0.807  1.0
  O  O29  1  0.219  0.468  0.765  1.0
  O  O30  1  0.686  0.579  0.580  1.0
  O  O31  1  0.642  0.851  0.518  1.0
  O  O32  1  0.867  0.363  0.487  1.0
  O  O33  1  0.448  0.679  0.512  1.0
  O  O34  1  0.172  0.914  0.530  1.0
  O  O35  1  0.046  0.189  0.588  1.0
  O  O36  1  0.980  0.833  0.383  1.0
  O  O37  1  0.821  0.102  0.494  1.0
  O  O38  1  0.559  0.323  0.488  1.0
  O  O39  1  0.149  0.657  0.475  1.0
  O  O40  1  0.357  0.149  0.533  1.0
  O  O41  1  0.319  0.403  0.405  1.0
  O  O42  1  0.719  0.535  0.265  1.0
  O  O43  1  0.754  0.969  0.174  1.0
  O  O44  1  0.025  0.221  0.307  1.0
  O  O45  1  0.468  0.219  0.265  1.0
  O  O46  1  0.579  0.686  0.080  1.0
  O  O47  1  0.363  0.867  0.987  1.0
  O  O48  1  0.679  0.448  0.012  1.0
  O  O49  1  0.914  0.172  0.030  1.0
  O  O50  1  0.189  0.046  0.088  1.0
  O  O51  1  0.149  0.357  0.033  1.0
[/CIF]
.
The structure described by KCoAl(PO4)2 crystallizes in the monoclinic Cc space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(11), one O(12), one O(13), one O(14), one O(15), one O(16), and one O(8) atom. In the second K site, K(2) is bonded in a 6-coordinate geometry to one O(1), one O(16), one O(2), one O(3), one O(4), and one O(5) atom. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(3), and one O(8) atom to form CoO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and corners with two equivalent P(4)O4 tetrahedra. In the second Co site, Co(2) is bonded to one O(10), one O(13), one O(5), and one O(6) atom to form CoO4 trigonal pyramids that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(11), one O(12), one O(4), and one O(7) atom to form AlO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. In the second Al site, Al(2) is bonded to one O(14), one O(15), one O(16), and one O(9) atom to form AlO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(12), one O(15), one O(3), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Al(1)O4 tetrahedra, and corners with two equivalent Al(2)O4 tetrahedra. In the second P site, P(2) is bonded to one O(10), one O(16), one O(4), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Al(2)O4 tetrahedra, and corners with two equivalent Co(2)O4 trigonal pyramids. In the third P site, P(3) is bonded to one O(1), one O(11), one O(13), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O4 tetrahedra, corners with two equivalent Al(1)O4 tetrahedra, and  a cornercorner with one Co(2)O4 trigonal pyramid. In the fourth P site, P(4) is bonded to one O(14), one O(2), one O(5), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Al(2)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, and  a cornercorner with one Co(2)O4 trigonal pyramid. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Co(1), and one P(3) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one K(2), one Co(1), and one P(4) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one K(2), one Co(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one K(2), one Al(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one K(2), one Co(2), and one P(4) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Co(2) and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted linear geometry to one Al(1) and one P(3) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one K(1), one Co(1), and one P(4) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Al(2) and one P(1) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one K(1), one Co(2), and one P(2) atom. In the eleventh O site, O(11) is bonded in a distorted bent 120 degrees geometry to one K(1), one Al(1), and one P(3) atom. In the twelfth O site, O(12) is bonded in a 2-coordinate geometry to one K(1), one Al(1), and one P(1) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one K(1), one Co(2), and one P(3) atom. In the fourteenth O site, O(14) is bonded in a bent 150 degrees geometry to one K(1), one Al(2), and one P(4) atom. In the fifteenth O site, O(15) is bonded in a distorted bent 120 degrees geometry to one K(1), one Al(2), and one P(1) atom. In the sixteenth O site, O(16) is bonded in a distorted bent 150 degrees geometry to one K(1), one K(2), one Al(2), and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_KAlCo(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.443
_cell_length_b   9.443
_cell_length_c   8.863
_cell_angle_alpha   82.582
_cell_angle_beta   82.582
_cell_angle_gamma   88.942
_symmetry_Int_Tables_number   1
_cell_volume   777.062
_cell_formula_units_Z   4
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  0.920  0.452  0.780  1.0
  K  K1  1  0.585  0.065  0.719  1.0
  K  K2  1  0.452  0.920  0.280  1.0
  K  K3  1  0.065  0.585  0.219  1.0
  Al  Al4  1  0.448  0.700  0.952  1.0
  Al  Al5  1  0.192  0.070  0.614  1.0
  Al  Al6  1  0.700  0.448  0.452  1.0
  Al  Al7  1  0.070  0.192  0.114  1.0
  Co  Co8  1  0.937  0.806  0.880  1.0
  Co  Co9  1  0.297  0.539  0.556  1.0
  Co  Co10  1  0.806  0.937  0.380  1.0
  Co  Co11  1  0.539  0.297  0.056  1.0
  P  P12  1  0.214  0.938  0.968  1.0
  P  P13  1  0.278  0.424  0.918  1.0
  P  P14  1  0.578  0.707  0.591  1.0
  P  P15  1  0.065  0.790  0.519  1.0
  P  P16  1  0.938  0.214  0.468  1.0
  P  P17  1  0.424  0.278  0.418  1.0
  P  P18  1  0.707  0.578  0.091  1.0
  P  P19  1  0.790  0.065  0.019  1.0
  O  O20  1  0.851  0.642  0.018  1.0
  O  O21  1  0.833  0.980  0.883  1.0
  O  O22  1  0.102  0.821  0.994  1.0
  O  O23  1  0.323  0.559  0.988  1.0
  O  O24  1  0.657  0.149  0.975  1.0
  O  O25  1  0.403  0.319  0.905  1.0
  O  O26  1  0.535  0.719  0.765  1.0
  O  O27  1  0.969  0.754  0.674  1.0
  O  O28  1  0.221  0.025  0.807  1.0
  O  O29  1  0.219  0.468  0.765  1.0
  O  O30  1  0.686  0.579  0.580  1.0
  O  O31  1  0.642  0.851  0.518  1.0
  O  O32  1  0.867  0.363  0.487  1.0
  O  O33  1  0.448  0.679  0.512  1.0
  O  O34  1  0.172  0.914  0.530  1.0
  O  O35  1  0.046  0.189  0.588  1.0
  O  O36  1  0.980  0.833  0.383  1.0
  O  O37  1  0.821  0.102  0.494  1.0
  O  O38  1  0.559  0.323  0.488  1.0
  O  O39  1  0.149  0.657  0.475  1.0
  O  O40  1  0.357  0.149  0.533  1.0
  O  O41  1  0.319  0.403  0.405  1.0
  O  O42  1  0.719  0.535  0.265  1.0
  O  O43  1  0.754  0.969  0.174  1.0
  O  O44  1  0.025  0.221  0.307  1.0
  O  O45  1  0.468  0.219  0.265  1.0
  O  O46  1  0.579  0.686  0.080  1.0
  O  O47  1  0.363  0.867  0.987  1.0
  O  O48  1  0.679  0.448  0.012  1.0
  O  O49  1  0.914  0.172  0.030  1.0
  O  O50  1  0.189  0.046  0.088  1.0
  O  O51  1  0.149  0.357  0.033  1.0
[/CIF]
.