The crystal structure described by GaAl(PO4)2 is quartz (alpha)-derived structured and crystallizes in the monoclinic C2 space group. Ga(1) is bonded to two equivalent O(1) and two equivalent O(4) atoms to form GaO4 tetrahedra that share corners with four equivalent P(1)O4 tetrahedra. Al(1) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form AlO4 tetrahedra that share corners with four equivalent P(1)O4 tetrahedra. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with two equivalent Ga(1)O4 tetrahedra and corners with two equivalent Al(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Ga(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Al(1) and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Al(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Ga(1) and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_AlGa(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.051
_cell_length_b   5.051
_cell_length_c   7.076
_cell_angle_alpha   89.795
_cell_angle_beta   89.795
_cell_angle_gamma   89.444
_symmetry_Int_Tables_number   1
_cell_volume   180.480
_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
  Al  Al0  1  0.808  0.192  0.500  1.0
  Ga  Ga1  1  0.197  0.803  0.000  1.0
  P  P2  1  0.694  0.693  0.254  1.0
  P  P3  1  0.307  0.306  0.746  1.0
  O  O4  1  0.850  0.766  0.074  1.0
  O  O5  1  0.772  0.864  0.424  1.0
  O  O6  1  0.136  0.228  0.576  1.0
  O  O7  1  0.234  0.150  0.926  1.0
  O  O8  1  0.743  0.401  0.307  1.0
  O  O9  1  0.396  0.735  0.212  1.0
  O  O10  1  0.265  0.604  0.788  1.0
  O  O11  1  0.599  0.257  0.693  1.0
[/CIF]
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The crystal structure described by GaAl(PO4)2 is quartz (alpha)-derived structured and crystallizes in the monoclinic C2 space group. Ga(1) is bonded to two equivalent O(1) and two equivalent O(4) atoms to form GaO4 tetrahedra that share corners with four equivalent P(1)O4 tetrahedra. Al(1) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form AlO4 tetrahedra that share corners with four equivalent P(1)O4 tetrahedra. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with two equivalent Ga(1)O4 tetrahedra and corners with two equivalent Al(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Ga(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Al(1) and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Al(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Ga(1) and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_AlGa(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.051
_cell_length_b   5.051
_cell_length_c   7.076
_cell_angle_alpha   89.795
_cell_angle_beta   89.795
_cell_angle_gamma   89.444
_symmetry_Int_Tables_number   1
_cell_volume   180.480
_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
  Al  Al0  1  0.808  0.192  0.500  1.0
  Ga  Ga1  1  0.197  0.803  0.000  1.0
  P  P2  1  0.694  0.693  0.254  1.0
  P  P3  1  0.307  0.306  0.746  1.0
  O  O4  1  0.850  0.766  0.074  1.0
  O  O5  1  0.772  0.864  0.424  1.0
  O  O6  1  0.136  0.228  0.576  1.0
  O  O7  1  0.234  0.150  0.926  1.0
  O  O8  1  0.743  0.401  0.307  1.0
  O  O9  1  0.396  0.735  0.212  1.0
  O  O10  1  0.265  0.604  0.788  1.0
  O  O11  1  0.599  0.257  0.693  1.0
[/CIF]
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