PrMnGeO5 is Esseneite-like structured and crystallizes in the triclinic P-1 space group. Pr(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms to form MnO6 octahedra that share corners with two equivalent Mn(2)O6 octahedra and corners with four equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. In the second Mn site, Mn(2) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra and corners with four equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. Ge(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form GeO4 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra and corners with two equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-58°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Pr(1), one Mn(1), and one Mn(2) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Pr(1), one Mn(1), and one Ge(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Pr(1), one Mn(2), and one Ge(1) atom. In the fourth O site, O(4) is bonded to two equivalent Pr(1), one Mn(2), and one Ge(1) atom to form a mixture of distorted corner and edge-sharing OPr2MnGe trigonal pyramids. In the fifth O site, O(5) is bonded to two equivalent Pr(1), one Mn(1), and one Ge(1) atom to form a mixture of distorted corner and edge-sharing OPr2MnGe tetrahedra.
PrMnGeO5 is Esseneite-like structured and crystallizes in the triclinic P-1 space group. Pr(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. The Pr(1)-O(1) bond length is 2.37 Å. The Pr(1)-O(2) bond length is 2.51 Å. There is one shorter (2.48 Å) and one longer (2.71 Å) Pr(1)-O(3) bond length. There is one shorter (2.57 Å) and one longer (2.62 Å) Pr(1)-O(4) bond length. There is one shorter (2.51 Å) and one longer (2.57 Å) Pr(1)-O(5) bond length. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms to form MnO6 octahedra that share corners with two equivalent Mn(2)O6 octahedra and corners with four equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. Both Mn(1)-O(1) bond lengths are 1.90 Å. Both Mn(1)-O(2) bond lengths are 2.02 Å. Both Mn(1)-O(5) bond lengths are 2.27 Å. In the second Mn site, Mn(2) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra and corners with four equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. Both Mn(2)-O(1) bond lengths are 1.89 Å. Both Mn(2)-O(3) bond lengths are 2.05 Å. Both Mn(2)-O(4) bond lengths are 2.34 Å. Ge(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form GeO4 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra and corners with two equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-58°. The Ge(1)-O(2) bond length is 1.77 Å. The Ge(1)-O(3) bond length is 1.79 Å. The Ge(1)-O(4) bond length is 1.80 Å. The Ge(1)-O(5) bond length is 1.76 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Pr(1), one Mn(1), and one Mn(2) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Pr(1), one Mn(1), and one Ge(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Pr(1), one Mn(2), and one Ge(1) atom. In the fourth O site, O(4) is bonded to two equivalent Pr(1), one Mn(2), and one Ge(1) atom to form a mixture of distorted corner and edge-sharing OPr2MnGe trigonal pyramids. In the fifth O site, O(5) is bonded to two equivalent Pr(1), one Mn(1), and one Ge(1) atom to form a mixture of distorted corner and edge-sharing OPr2MnGe tetrahedra.