LiPa2Pr2O8 crystallizes in the monoclinic C2 space group. Li(1) is bonded to two equivalent O(1) and two equivalent O(3) atoms to form distorted LiO4 tetrahedra that share corners with two equivalent Pa(1)O6 pentagonal pyramids. There are two inequivalent Pa sites. In the first Pa site, Pa(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form distorted PaO6 pentagonal pyramids that share corners with two equivalent Li(1)O4 tetrahedra. In the second Pa site, Pa(2) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the second Pr site, Pr(2) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Li(1), one Pa(2), one Pr(1), and one Pr(2) atom. In the second O site, O(2) is bonded to one Pa(1), one Pa(2), one Pr(1), and one Pr(2) atom to form a mixture of corner and edge-sharing OPr2Pa2 tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Li(1), one Pa(1), one Pa(2), and one Pr(1) atom. In the fourth O site, O(4) is bonded to one Pa(1), one Pa(2), one Pr(1), and one Pr(2) atom to form a mixture of corner and edge-sharing OPr2Pa2 tetrahedra.
LiPa2Pr2O8 crystallizes in the monoclinic C2 space group. Li(1) is bonded to two equivalent O(1) and two equivalent O(3) atoms to form distorted LiO4 tetrahedra that share corners with two equivalent Pa(1)O6 pentagonal pyramids. Both Li(1)-O(1) bond lengths are 2.18 Å. Both Li(1)-O(3) bond lengths are 1.85 Å. There are two inequivalent Pa sites. In the first Pa site, Pa(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form distorted PaO6 pentagonal pyramids that share corners with two equivalent Li(1)O4 tetrahedra. Both Pa(1)-O(2) bond lengths are 2.19 Å. Both Pa(1)-O(3) bond lengths are 2.22 Å. Both Pa(1)-O(4) bond lengths are 2.30 Å. In the second Pa site, Pa(2) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. Both Pa(2)-O(1) bond lengths are 2.37 Å. Both Pa(2)-O(2) bond lengths are 2.36 Å. Both Pa(2)-O(3) bond lengths are 2.47 Å. Both Pa(2)-O(4) bond lengths are 2.36 Å. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. Both Pr(1)-O(1) bond lengths are 2.45 Å. Both Pr(1)-O(2) bond lengths are 2.45 Å. Both Pr(1)-O(3) bond lengths are 2.76 Å. Both Pr(1)-O(4) bond lengths are 2.54 Å. In the second Pr site, Pr(2) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. Both Pr(2)-O(1) bond lengths are 2.34 Å. Both Pr(2)-O(2) bond lengths are 2.39 Å. Both Pr(2)-O(4) bond lengths are 2.43 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Li(1), one Pa(2), one Pr(1), and one Pr(2) atom. In the second O site, O(2) is bonded to one Pa(1), one Pa(2), one Pr(1), and one Pr(2) atom to form a mixture of corner and edge-sharing OPr2Pa2 tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Li(1), one Pa(1), one Pa(2), and one Pr(1) atom. In the fourth O site, O(4) is bonded to one Pa(1), one Pa(2), one Pr(1), and one Pr(2) atom to form a mixture of corner and edge-sharing OPr2Pa2 tetrahedra.