CaPr(BiO3)2 crystallizes in the orthorhombic Pmn2_1 space group. Ca(1) is bonded in a 6-coordinate geometry to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms. Pr(1) is bonded in a 6-coordinate geometry to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms. Bi(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing BiO6 octahedra. The corner-sharing octahedral tilt angles range from 41-47°. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Ca(1), one Pr(1), and two equivalent Bi(1) atoms to form distorted corner-sharing OCaPrBi2 trigonal pyramids. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Ca(1), one Pr(1), and two equivalent Bi(1) atoms. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ca(1), one Pr(1), and two equivalent Bi(1) atoms. In the fourth O site, O(4) is bonded to one Ca(1), one Pr(1), and two equivalent Bi(1) atoms to form distorted corner-sharing OCaPrBi2 trigonal pyramids.
CaPr(BiO3)2 crystallizes in the orthorhombic Pmn2_1 space group. Ca(1) is bonded in a 6-coordinate geometry to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms. The Ca(1)-O(1) bond length is 2.54 Å. The Ca(1)-O(4) bond length is 2.33 Å. Both Ca(1)-O(2) bond lengths are 2.86 Å. Both Ca(1)-O(3) bond lengths are 2.40 Å. Pr(1) is bonded in a 6-coordinate geometry to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms. The Pr(1)-O(1) bond length is 2.39 Å. The Pr(1)-O(4) bond length is 2.46 Å. Both Pr(1)-O(2) bond lengths are 2.38 Å. Both Pr(1)-O(3) bond lengths are 2.67 Å. Bi(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing BiO6 octahedra. The corner-sharing octahedral tilt angles range from 41-47°. The Bi(1)-O(1) bond length is 2.36 Å. The Bi(1)-O(4) bond length is 2.36 Å. Both Bi(1)-O(2) bond lengths are 2.28 Å. There is one shorter (2.28 Å) and one longer (2.32 Å) Bi(1)-O(3) bond length. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Ca(1), one Pr(1), and two equivalent Bi(1) atoms to form distorted corner-sharing OCaPrBi2 trigonal pyramids. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Ca(1), one Pr(1), and two equivalent Bi(1) atoms. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ca(1), one Pr(1), and two equivalent Bi(1) atoms. In the fourth O site, O(4) is bonded to one Ca(1), one Pr(1), and two equivalent Bi(1) atoms to form distorted corner-sharing OCaPrBi2 trigonal pyramids.