CaBePr2O5 crystallizes in the orthorhombic Pna2_1 space group. Ca(1) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. Be(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 8-coordinate geometry to one O(3), one O(4), two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms. In the second Pr site, Pr(2) is bonded in a 9-coordinate geometry to one O(2), two equivalent O(1), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. There are five inequivalent O sites. In the first O site, O(5) is bonded to two equivalent Ca(1), two equivalent Pr(1), and two equivalent Pr(2) atoms to form distorted corner-sharing OCa2Pr4 octahedra. The corner-sharing octahedral tilt angles range from 33-44°. In the second O site, O(1) is bonded in a 1-coordinate geometry to one Ca(1), one Be(1), two equivalent Pr(1), and two equivalent Pr(2) atoms. In the third O site, O(2) is bonded in a 1-coordinate geometry to two equivalent Ca(1), one Be(1), one Pr(2), and two equivalent Pr(1) atoms. In the fourth O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Ca(1), one Be(1), one Pr(1), and two equivalent Pr(2) atoms. In the fifth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent Ca(1), one Be(1), one Pr(1), and two equivalent Pr(2) atoms.
CaBePr2O5 crystallizes in the orthorhombic Pna2_1 space group. Ca(1) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. The Ca(1)-O(1) bond length is 2.80 Å. There is one shorter (2.53 Å) and one longer (2.84 Å) Ca(1)-O(2) bond length. There is one shorter (2.52 Å) and one longer (2.62 Å) Ca(1)-O(3) bond length. There is one shorter (2.53 Å) and one longer (2.55 Å) Ca(1)-O(4) bond length. There is one shorter (2.49 Å) and one longer (2.63 Å) Ca(1)-O(5) bond length. Be(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. The Be(1)-O(1) bond length is 1.62 Å. The Be(1)-O(2) bond length is 1.61 Å. The Be(1)-O(3) bond length is 1.69 Å. The Be(1)-O(4) bond length is 1.64 Å. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 8-coordinate geometry to one O(3), one O(4), two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms. The Pr(1)-O(3) bond length is 2.47 Å. The Pr(1)-O(4) bond length is 2.54 Å. There is one shorter (2.38 Å) and one longer (2.50 Å) Pr(1)-O(1) bond length. There is one shorter (2.34 Å) and one longer (2.56 Å) Pr(1)-O(2) bond length. There is one shorter (2.44 Å) and one longer (2.85 Å) Pr(1)-O(5) bond length. In the second Pr site, Pr(2) is bonded in a 9-coordinate geometry to one O(2), two equivalent O(1), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. The Pr(2)-O(2) bond length is 2.74 Å. There is one shorter (2.59 Å) and one longer (2.81 Å) Pr(2)-O(1) bond length. There is one shorter (2.53 Å) and one longer (2.65 Å) Pr(2)-O(3) bond length. There is one shorter (2.47 Å) and one longer (2.55 Å) Pr(2)-O(4) bond length. There is one shorter (2.45 Å) and one longer (2.70 Å) Pr(2)-O(5) bond length. There are five inequivalent O sites. In the first O site, O(5) is bonded to two equivalent Ca(1), two equivalent Pr(1), and two equivalent Pr(2) atoms to form distorted corner-sharing OCa2Pr4 octahedra. The corner-sharing octahedral tilt angles range from 33-44°. In the second O site, O(1) is bonded in a 1-coordinate geometry to one Ca(1), one Be(1), two equivalent Pr(1), and two equivalent Pr(2) atoms. In the third O site, O(2) is bonded in a 1-coordinate geometry to two equivalent Ca(1), one Be(1), one Pr(2), and two equivalent Pr(1) atoms. In the fourth O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Ca(1), one Be(1), one Pr(1), and two equivalent Pr(2) atoms. In the fifth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent Ca(1), one Be(1), one Pr(1), and two equivalent Pr(2) atoms.