The structure described by BaMgAl3P2(HO7)2 crystallizes in the monoclinic Cm space group. Ba(1) is bonded in a 10-coordinate geometry to one O(3), one O(4), two equivalent O(10), two equivalent O(5), two equivalent O(6), and two equivalent O(9) atoms. Mg(1) is bonded in a 4-coordinate geometry to one O(1), one O(8), and two equivalent O(10) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(3), one O(4), two equivalent O(10), and two equivalent O(9) atoms to form distorted AlO6 octahedra that share corners with four equivalent Al(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 32-56°. In the second Al site, Al(2) is bonded to one O(10), one O(5), one O(6), one O(7), one O(8), and one O(9) atom to form AlO6 octahedra that share corners with two equivalent Al(1)O6 octahedra, corners with two equivalent Al(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 32-56°. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(3), and two equivalent O(5) atoms to form PO4 tetrahedra that share  a cornercorner with one Al(1)O6 octahedra and corners with two equivalent Al(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-58°. In the second P site, P(2) is bonded to one O(2), one O(4), and two equivalent O(6) atoms to form PO4 tetrahedra that share  a cornercorner with one Al(1)O6 octahedra and corners with two equivalent Al(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-46°. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(7) atom. In the second H site, H(2) is bonded in a distorted single-bond geometry to one O(2) and one O(8) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Mg(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one P(2) and one H(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Al(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Ba(1), one Al(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Al(2), and one P(1) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one Ba(1), one Al(2), and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to two equivalent Al(2) and one H(1) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Mg(1), two equivalent Al(2), and one H(2) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Ba(1), one Al(1), one Al(2), and one O(9) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Ba(1), one Mg(1), one Al(1), and one Al(2) atom. is represented by the CIF card [CIF]
data_BaMgAl3P2(HO7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.213
_cell_length_b   7.213
_cell_length_c   7.238
_cell_angle_alpha   62.596
_cell_angle_beta   117.404
_cell_angle_gamma   123.282
_symmetry_Int_Tables_number   1
_cell_volume   268.289
_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
  Ba  Ba0  1  0.013  0.987  0.005  1.0
  Mg  Mg1  1  0.525  0.475  0.346  1.0
  Al  Al2  1  0.014  0.986  0.459  1.0
  Al  Al3  1  0.485  0.011  0.487  1.0
  Al  Al4  1  0.989  0.515  0.487  1.0
  P  P5  1  0.283  0.717  0.865  1.0
  P  P6  1  0.725  0.275  0.100  1.0
  H  H7  1  0.293  0.707  0.302  1.0
  H  H8  1  0.702  0.298  0.698  1.0
  O  O9  1  0.352  0.648  0.113  1.0
  O  O10  1  0.643  0.357  0.855  1.0
  O  O11  1  0.141  0.859  0.767  1.0
  O  O12  1  0.864  0.136  0.177  1.0
  O  O13  1  0.136  0.497  0.783  1.0
  O  O14  1  0.503  0.864  0.783  1.0
  O  O15  1  0.516  0.124  0.202  1.0
  O  O16  1  0.876  0.484  0.202  1.0
  O  O17  1  0.281  0.719  0.427  1.0
  O  O18  1  0.713  0.287  0.568  1.0
  O  O19  1  0.803  0.990  0.563  1.0
  O  O20  1  0.010  0.197  0.563  1.0
  O  O21  1  0.866  0.721  0.388  1.0
  O  O22  1  0.279  0.134  0.388  1.0
[/CIF]
.
The structure described by BaMgAl3P2(HO7)2 crystallizes in the monoclinic Cm space group. Ba(1) is bonded in a 10-coordinate geometry to one O(3), one O(4), two equivalent O(10), two equivalent O(5), two equivalent O(6), and two equivalent O(9) atoms. Mg(1) is bonded in a 4-coordinate geometry to one O(1), one O(8), and two equivalent O(10) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(3), one O(4), two equivalent O(10), and two equivalent O(9) atoms to form distorted AlO6 octahedra that share corners with four equivalent Al(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 32-56°. In the second Al site, Al(2) is bonded to one O(10), one O(5), one O(6), one O(7), one O(8), and one O(9) atom to form AlO6 octahedra that share corners with two equivalent Al(1)O6 octahedra, corners with two equivalent Al(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 32-56°. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(3), and two equivalent O(5) atoms to form PO4 tetrahedra that share  a cornercorner with one Al(1)O6 octahedra and corners with two equivalent Al(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-58°. In the second P site, P(2) is bonded to one O(2), one O(4), and two equivalent O(6) atoms to form PO4 tetrahedra that share  a cornercorner with one Al(1)O6 octahedra and corners with two equivalent Al(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-46°. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(7) atom. In the second H site, H(2) is bonded in a distorted single-bond geometry to one O(2) and one O(8) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Mg(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one P(2) and one H(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Al(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Ba(1), one Al(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Al(2), and one P(1) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one Ba(1), one Al(2), and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to two equivalent Al(2) and one H(1) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Mg(1), two equivalent Al(2), and one H(2) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Ba(1), one Al(1), one Al(2), and one O(9) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Ba(1), one Mg(1), one Al(1), and one Al(2) atom. is represented by the CIF card [CIF]
data_BaMgAl3P2(HO7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.213
_cell_length_b   7.213
_cell_length_c   7.238
_cell_angle_alpha   62.596
_cell_angle_beta   117.404
_cell_angle_gamma   123.282
_symmetry_Int_Tables_number   1
_cell_volume   268.289
_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
  Ba  Ba0  1  0.013  0.987  0.005  1.0
  Mg  Mg1  1  0.525  0.475  0.346  1.0
  Al  Al2  1  0.014  0.986  0.459  1.0
  Al  Al3  1  0.485  0.011  0.487  1.0
  Al  Al4  1  0.989  0.515  0.487  1.0
  P  P5  1  0.283  0.717  0.865  1.0
  P  P6  1  0.725  0.275  0.100  1.0
  H  H7  1  0.293  0.707  0.302  1.0
  H  H8  1  0.702  0.298  0.698  1.0
  O  O9  1  0.352  0.648  0.113  1.0
  O  O10  1  0.643  0.357  0.855  1.0
  O  O11  1  0.141  0.859  0.767  1.0
  O  O12  1  0.864  0.136  0.177  1.0
  O  O13  1  0.136  0.497  0.783  1.0
  O  O14  1  0.503  0.864  0.783  1.0
  O  O15  1  0.516  0.124  0.202  1.0
  O  O16  1  0.876  0.484  0.202  1.0
  O  O17  1  0.281  0.719  0.427  1.0
  O  O18  1  0.713  0.287  0.568  1.0
  O  O19  1  0.803  0.990  0.563  1.0
  O  O20  1  0.010  0.197  0.563  1.0
  O  O21  1  0.866  0.721  0.388  1.0
  O  O22  1  0.279  0.134  0.388  1.0
[/CIF]
.