Be12P16H17O48 crystallizes in the hexagonal P6_3/m space group. There are three inequivalent Be sites. In the first Be site, Be(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form BeO4 tetrahedra that share  a cornercorner with one P(1)HO3 tetrahedra,  a cornercorner with one P(2)HO3 tetrahedra,  a cornercorner with one P(3)HO3 tetrahedra, and  a cornercorner with one P(4)HO3 tetrahedra. The Be(1)-O(1) bond length is 1.61 Å. The Be(1)-O(2) bond length is 1.61 Å. The Be(1)-O(3) bond length is 1.64 Å. The Be(1)-O(5) bond length is 1.62 Å. In the second Be site, Be(2) is bonded to one O(7), one O(8), and two equivalent O(6) atoms to form BeO4 tetrahedra that share  a cornercorner with one P(2)HO3 tetrahedra,  a cornercorner with one P(3)HO3 tetrahedra, and corners with two equivalent P(1)HO3 tetrahedra. The Be(2)-O(7) bond length is 1.62 Å. The Be(2)-O(8) bond length is 1.61 Å. Both Be(2)-O(6) bond lengths are 1.62 Å. In the third Be site, Be(3) is bonded to one O(10), one O(9), and two equivalent O(4) atoms to form BeO4 tetrahedra that share  a cornercorner with one P(4)HO3 tetrahedra, corners with two equivalent P(1)HO3 tetrahedra, and  a cornercorner with one P(5)H2O3 trigonal bipyramid. The Be(3)-O(10) bond length is 1.60 Å. The Be(3)-O(9) bond length is 1.63 Å. Both Be(3)-O(4) bond lengths are 1.60 Å. There are five inequivalent P sites. In the first P site, P(1) is bonded to one H(1), one O(4), one O(5), and one O(6) atom to form distorted PHO3 tetrahedra that share  a cornercorner with one Be(1)O4 tetrahedra,  a cornercorner with one Be(2)O4 tetrahedra, and  a cornercorner with one Be(3)O4 tetrahedra. The P(1)-H(1) bond length is 1.38 Å. The P(1)-O(4) bond length is 1.52 Å. The P(1)-O(5) bond length is 1.51 Å. The P(1)-O(6) bond length is 1.50 Å. In the second P site, P(2) is bonded to one H(2), one O(7), and two equivalent O(1) atoms to form distorted PHO3 tetrahedra that share  a cornercorner with one Be(2)O4 tetrahedra and corners with two equivalent Be(1)O4 tetrahedra. The P(2)-H(2) bond length is 1.38 Å. The P(2)-O(7) bond length is 1.51 Å. Both P(2)-O(1) bond lengths are 1.50 Å. In the third P site, P(3) is bonded to one H(3), one O(8), and two equivalent O(2) atoms to form PHO3 tetrahedra that share  a cornercorner with one Be(2)O4 tetrahedra and corners with two equivalent Be(1)O4 tetrahedra. The P(3)-H(3) bond length is 1.18 Å. The P(3)-O(8) bond length is 1.51 Å. Both P(3)-O(2) bond lengths are 1.51 Å. In the fourth P site, P(4) is bonded to one H(4), one O(9), and two equivalent O(3) atoms to form distorted PHO3 tetrahedra that share  a cornercorner with one Be(3)O4 tetrahedra and corners with two equivalent Be(1)O4 tetrahedra. The P(4)-H(4) bond length is 1.41 Å. The P(4)-O(9) bond length is 1.50 Å. Both P(4)-O(3) bond lengths are 1.52 Å. In the fifth P site, P(5) is bonded to two equivalent H(5) and three equivalent O(10) atoms to form PH2O3 trigonal bipyramids that share corners with three equivalent Be(3)O4 tetrahedra. Both P(5)-H(5) bond lengths are 1.23 Å. All P(5)-O(10) bond lengths are 1.43 Å. There are five inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one P(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one P(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one P(3) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one P(4) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one P(5) atom. There are ten inequivalent O sites. In the first O site, O(7) is bonded in a bent 150 degrees geometry to one Be(2) and one P(2) atom. In the second O site, O(8) is bonded in a bent 150 degrees geometry to one Be(2) and one P(3) atom. In the third O site, O(9) is bonded in a bent 150 degrees geometry to one Be(3) and one P(4) atom. In the fourth O site, O(10) is bonded in a bent 150 degrees geometry to one Be(3) and one P(5) atom. In the fifth O site, O(1) is bonded in a bent 150 degrees geometry to one Be(1) and one P(2) atom. In the sixth O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Be(1) and one P(3) atom. In the seventh O site, O(3) is bonded in a bent 150 degrees geometry to one Be(1) and one P(4) atom. In the eighth O site, O(4) is bonded in a bent 150 degrees geometry to one Be(3) and one P(1) atom. In the ninth O site, O(5) is bonded in a bent 150 degrees geometry to one Be(1) and one P(1) atom. In the tenth O site, O(6) is bonded in a bent 150 degrees geometry to one Be(2) and one P(1) atom. Linkers: 30 [O][PH]([O])=O ,2 [O][PH2]([O])[O]. Metal clusters: 24 [Be]. The MOF has largest included sphere 8.74 A, density 1.23 g/cm3, surface area 3334.79 m2/g, accessible volume 0.48 cm3/g