MgAl3(PO4)4 is Low Tridymite-derived structured and crystallizes in the monoclinic P2_1/c space group. Mg(1) is bonded to one O(14), one O(16), one O(5), and one O(6) atom to form MgO4 trigonal pyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and  a cornercorner with one P(4)O4 tetrahedra. The Mg(1)-O(14) bond length is 2.00 Å. The Mg(1)-O(16) bond length is 1.97 Å. The Mg(1)-O(5) bond length is 2.02 Å. The Mg(1)-O(6) bond length is 2.06 Å. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(1), one O(10), one O(4), and one O(7) atom to form AlO4 tetrahedra that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. The Al(1)-O(1) bond length is 1.75 Å. The Al(1)-O(10) bond length is 1.74 Å. The Al(1)-O(4) bond length is 1.75 Å. The Al(1)-O(7) bond length is 1.74 Å. In the second Al site, Al(2) is bonded to one O(11), one O(13), one O(2), and one O(3) atom to form AlO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. The Al(2)-O(11) bond length is 1.72 Å. The Al(2)-O(13) bond length is 1.74 Å. The Al(2)-O(2) bond length is 1.74 Å. The Al(2)-O(3) bond length is 1.75 Å. In the third Al site, Al(3) is bonded to one O(12), one O(15), one O(8), 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(3)O4 tetrahedra. The Al(3)-O(12) bond length is 1.76 Å. The Al(3)-O(15) bond length is 1.72 Å. The Al(3)-O(8) bond length is 1.75 Å. The Al(3)-O(9) bond length is 1.74 Å. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(10), one O(11), one O(14), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one Al(2)O4 tetrahedra, corners with two equivalent Al(1)O4 tetrahedra, and  a cornercorner with one Mg(1)O4 trigonal pyramid. The P(1)-O(10) bond length is 1.55 Å. The P(1)-O(11) bond length is 1.55 Å. The P(1)-O(14) bond length is 1.51 Å. The P(1)-O(4) bond length is 1.54 Å. In the second P site, P(2) is bonded to one O(2), one O(3), one O(6), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Al(3)O4 tetrahedra, corners with two equivalent Al(2)O4 tetrahedra, and  a cornercorner with one Mg(1)O4 trigonal pyramid. The P(2)-O(2) bond length is 1.55 Å. The P(2)-O(3) bond length is 1.53 Å. The P(2)-O(6) bond length is 1.51 Å. The P(2)-O(8) bond length is 1.52 Å. In the third P site, P(3) is bonded to one O(15), one O(16), one O(7), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Al(1)O4 tetrahedra, corners with two equivalent Al(3)O4 tetrahedra, and  a cornercorner with one Mg(1)O4 trigonal pyramid. The P(3)-O(15) bond length is 1.52 Å. The P(3)-O(16) bond length is 1.50 Å. The P(3)-O(7) bond length is 1.51 Å. The P(3)-O(9) bond length is 1.55 Å. In the fourth P site, P(4) is bonded to one O(1), one O(12), one O(13), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Al(2)O4 tetrahedra,  a cornercorner with one Al(3)O4 tetrahedra, and  a cornercorner with one Mg(1)O4 trigonal pyramid. The P(4)-O(1) bond length is 1.55 Å. The P(4)-O(12) bond length is 1.53 Å. The P(4)-O(13) bond length is 1.56 Å. The P(4)-O(5) bond length is 1.50 Å. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Al(1) and one P(4) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Al(2) and one P(2) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Al(2) and one P(2) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Al(1) and one P(1) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Mg(1) and one P(4) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Mg(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Al(1) and one P(3) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one Al(3) and one P(2) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Al(3) and one P(3) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one Al(1) and one P(1) atom. In the eleventh O site, O(11) is bonded in a linear geometry to one Al(2) and one P(1) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one Al(3) and one P(4) atom. In the thirteenth O site, O(13) is bonded in a bent 150 degrees geometry to one Al(2) and one P(4) atom. In the fourteenth O site, O(14) is bonded in a distorted bent 150 degrees geometry to one Mg(1) and one P(1) atom. In the fifteenth O site, O(15) is bonded in a linear geometry to one Al(3) and one P(3) atom. In the sixteenth O site, O(16) is bonded in a bent 150 degrees geometry to one Mg(1) and one P(3) atom. Linkers: 16 [O]P([O])([O])=O. Metal clusters: 4 [Mg] ,12 [Al]. The MOF has largest included sphere 3.97 A, density 1.88 g/cm3, surface area 2885.38 m2/g, accessible volume 0.15 cm3/g