Ca2Be2P2O9F crystallizes in the monoclinic Pc space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 8-coordinate geometry to one O(1), one O(3), one O(5), one O(6), one O(7), one O(8), one O(9), and one F(1) atom. In the second Ca site, Ca(2) is bonded in a 8-coordinate geometry to one O(2), one O(4), one O(5), one O(6), one O(7), one O(8), one O(9), and one F(1) atom. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded to one O(1), one O(4), one O(5), and one O(9) atom to form BeO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra and corners with two equivalent P(1)O4 tetrahedra. In the second Be site, Be(2) is bonded to one O(2), one O(3), one O(6), and one F(1) atom to form BeO3F tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra and corners with two equivalent P(2)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(3), one O(5), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Be(2)O3F tetrahedra and corners with two equivalent Be(1)O4 tetrahedra. In the second P site, P(2) is bonded to one O(2), one O(4), one O(6), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Be(1)O4 tetrahedra and corners with two equivalent Be(2)O3F tetrahedra. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Ca(1), one Be(1), and one P(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Ca(2), one Be(2), and one P(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Ca(1), one Be(2), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ca(2), one Be(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Ca(1), one Ca(2), one Be(1), and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Ca(1), one Ca(2), one Be(2), and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Ca(1), one Ca(2), and one P(1) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Ca(1), one Ca(2), and one P(2) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Ca(1), one Ca(2), and one Be(1) atom. F(1) is bonded in a distorted single-bond geometry to one Ca(1), one Ca(2), and one Be(2) atom.
Ca2Be2P2O9F crystallizes in the monoclinic Pc space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 8-coordinate geometry to one O(1), one O(3), one O(5), one O(6), one O(7), one O(8), one O(9), and one F(1) atom. The Ca(1)-O(1) bond length is 2.47 Å. The Ca(1)-O(3) bond length is 2.48 Å. The Ca(1)-O(5) bond length is 2.75 Å. The Ca(1)-O(6) bond length is 2.64 Å. The Ca(1)-O(7) bond length is 2.40 Å. The Ca(1)-O(8) bond length is 2.40 Å. The Ca(1)-O(9) bond length is 2.50 Å. The Ca(1)-F(1) bond length is 2.44 Å. In the second Ca site, Ca(2) is bonded in a 8-coordinate geometry to one O(2), one O(4), one O(5), one O(6), one O(7), one O(8), one O(9), and one F(1) atom. The Ca(2)-O(2) bond length is 2.48 Å. The Ca(2)-O(4) bond length is 2.44 Å. The Ca(2)-O(5) bond length is 2.66 Å. The Ca(2)-O(6) bond length is 2.74 Å. The Ca(2)-O(7) bond length is 2.42 Å. The Ca(2)-O(8) bond length is 2.38 Å. The Ca(2)-O(9) bond length is 2.41 Å. The Ca(2)-F(1) bond length is 2.53 Å. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded to one O(1), one O(4), one O(5), and one O(9) atom to form BeO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra and corners with two equivalent P(1)O4 tetrahedra. The Be(1)-O(1) bond length is 1.64 Å. The Be(1)-O(4) bond length is 1.62 Å. The Be(1)-O(5) bond length is 1.66 Å. The Be(1)-O(9) bond length is 1.62 Å. In the second Be site, Be(2) is bonded to one O(2), one O(3), one O(6), and one F(1) atom to form BeO3F tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra and corners with two equivalent P(2)O4 tetrahedra. The Be(2)-O(2) bond length is 1.62 Å. The Be(2)-O(3) bond length is 1.61 Å. The Be(2)-O(6) bond length is 1.66 Å. The Be(2)-F(1) bond length is 1.58 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(3), one O(5), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Be(2)O3F tetrahedra and corners with two equivalent Be(1)O4 tetrahedra. The P(1)-O(1) bond length is 1.56 Å. The P(1)-O(3) bond length is 1.56 Å. The P(1)-O(5) bond length is 1.57 Å. The P(1)-O(7) bond length is 1.53 Å. In the second P site, P(2) is bonded to one O(2), one O(4), one O(6), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Be(1)O4 tetrahedra and corners with two equivalent Be(2)O3F tetrahedra. The P(2)-O(2) bond length is 1.56 Å. The P(2)-O(4) bond length is 1.56 Å. The P(2)-O(6) bond length is 1.57 Å. The P(2)-O(8) bond length is 1.53 Å. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Ca(1), one Be(1), and one P(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Ca(2), one Be(2), and one P(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Ca(1), one Be(2), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ca(2), one Be(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Ca(1), one Ca(2), one Be(1), and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Ca(1), one Ca(2), one Be(2), and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Ca(1), one Ca(2), and one P(1) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Ca(1), one Ca(2), and one P(2) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Ca(1), one Ca(2), and one Be(1) atom. F(1) is bonded in a distorted single-bond geometry to one Ca(1), one Ca(2), and one Be(2) atom.