MnAl3(PO4)4 crystallizes in the trigonal P-3 space group. Mn(1) is bonded to one O(6) and three equivalent O(5) atoms to form MnO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra and corners with three equivalent P(1)O4 tetrahedra. The Mn(1)-O(6) bond length is 2.00 Å. All Mn(1)-O(5) bond lengths are 2.04 Å. Al(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form AlO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra and corners with three equivalent P(1)O4 tetrahedra. The Al(1)-O(1) bond length is 1.75 Å. The Al(1)-O(2) bond length is 1.77 Å. The Al(1)-O(3) bond length is 1.75 Å. The Al(1)-O(4) bond length is 1.78 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O4 tetrahedra and corners with three equivalent Al(1)O4 tetrahedra. The P(1)-O(1) bond length is 1.53 Å. The P(1)-O(2) bond length is 1.53 Å. The P(1)-O(3) bond length is 1.52 Å. The P(1)-O(5) bond length is 1.49 Å. In the second P site, P(2) is bonded to one O(6) and three equivalent O(4) atoms to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O4 tetrahedra and corners with three equivalent Al(1)O4 tetrahedra. The P(2)-O(6) bond length is 1.47 Å. All P(2)-O(4) bond lengths are 1.53 Å. There are six inequivalent O sites. In the first O site, O(6) is bonded in a linear geometry to one Mn(1) and one P(2) atom. In the second O site, O(1) is bonded in a linear geometry to one Al(1) and one P(1) atom. In the third O site, O(2) is bonded in a bent 120 degrees geometry to one Al(1) and one P(1) atom. In the fourth O site, O(3) is bonded in a bent 150 degrees geometry to one Al(1) and one P(1) atom. In the fifth O site, O(4) is bonded in a bent 150 degrees geometry to one Al(1) and one P(2) atom. In the sixth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Mn(1) and one P(1) atom. Linkers: 8 [O]P([O])([O])=O. Metal clusters: 2 [Mn] ,6 [Al]. RCSR code: afy. The MOF has largest included sphere 8.23 A, density 1.33 g/cm3, surface area 2574.72 m2/g, accessible volume 0.42 cm3/g