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.
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. Both Ga(1)-O(1) bond lengths are 1.84 Å. Both Ga(1)-O(4) bond lengths are 1.84 Å. 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. Both Al(1)-O(2) bond lengths are 1.75 Å. Both Al(1)-O(3) bond lengths are 1.75 Å. 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. The P(1)-O(1) bond length is 1.55 Å. The P(1)-O(2) bond length is 1.54 Å. The P(1)-O(3) bond length is 1.54 Å. The P(1)-O(4) bond length is 1.55 Å. 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.