BeCrO4 crystallizes in the monoclinic C2/m space group. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded to one O(1), one O(2), and two equivalent O(5) atoms to form BeO4 tetrahedra that share corners with two equivalent Be(2)O4 tetrahedra, corners with two equivalent Cr(1)O4 tetrahedra, and corners with two equivalent Cr(2)O4 tetrahedra. In the second Be site, Be(2) is bonded to two equivalent O(4) and two equivalent O(5) atoms to form BeO4 tetrahedra that share corners with two equivalent Be(1)O4 tetrahedra, corners with two equivalent Cr(1)O4 tetrahedra, and corners with two equivalent Cr(2)O4 tetrahedra. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(1), one O(2), and two equivalent O(4) atoms to form CrO4 tetrahedra that share corners with two equivalent Be(1)O4 tetrahedra and corners with two equivalent Be(2)O4 tetrahedra. In the second Cr site, Cr(2) is bonded to two equivalent O(3) and two equivalent O(5) atoms to form CrO4 tetrahedra that share corners with two equivalent Be(1)O4 tetrahedra and corners with two equivalent Be(2)O4 tetrahedra. There are five inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one Be(1) and one Cr(1) atom. In the second O site, O(2) is bonded in a linear geometry to one Be(1) and one Cr(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Cr(2) atom. In the fourth O site, O(4) is bonded in a linear geometry to one Be(2) and one Cr(1) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Be(1), one Be(2), and one Cr(2) atom.
BeCrO4 crystallizes in the monoclinic C2/m space group. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded to one O(1), one O(2), and two equivalent O(5) atoms to form BeO4 tetrahedra that share corners with two equivalent Be(2)O4 tetrahedra, corners with two equivalent Cr(1)O4 tetrahedra, and corners with two equivalent Cr(2)O4 tetrahedra. The Be(1)-O(1) bond length is 1.65 Å. The Be(1)-O(2) bond length is 1.69 Å. Both Be(1)-O(5) bond lengths are 1.67 Å. In the second Be site, Be(2) is bonded to two equivalent O(4) and two equivalent O(5) atoms to form BeO4 tetrahedra that share corners with two equivalent Be(1)O4 tetrahedra, corners with two equivalent Cr(1)O4 tetrahedra, and corners with two equivalent Cr(2)O4 tetrahedra. Both Be(2)-O(4) bond lengths are 1.66 Å. Both Be(2)-O(5) bond lengths are 1.64 Å. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(1), one O(2), and two equivalent O(4) atoms to form CrO4 tetrahedra that share corners with two equivalent Be(1)O4 tetrahedra and corners with two equivalent Be(2)O4 tetrahedra. The Cr(1)-O(1) bond length is 1.67 Å. The Cr(1)-O(2) bond length is 1.70 Å. Both Cr(1)-O(4) bond lengths are 1.66 Å. In the second Cr site, Cr(2) is bonded to two equivalent O(3) and two equivalent O(5) atoms to form CrO4 tetrahedra that share corners with two equivalent Be(1)O4 tetrahedra and corners with two equivalent Be(2)O4 tetrahedra. Both Cr(2)-O(3) bond lengths are 1.59 Å. Both Cr(2)-O(5) bond lengths are 1.78 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one Be(1) and one Cr(1) atom. In the second O site, O(2) is bonded in a linear geometry to one Be(1) and one Cr(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Cr(2) atom. In the fourth O site, O(4) is bonded in a linear geometry to one Be(2) and one Cr(1) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Be(1), one Be(2), and one Cr(2) atom.