Nd2B8O15 crystallizes in the monoclinic P2/c space group. Nd(1) is bonded in a 11-coordinate geometry to one O(7), one O(8), two equivalent O(2), two equivalent O(4), two equivalent O(5), and three equivalent O(1) atoms. There are four inequivalent B sites. In the first B site, B(1) is bonded to one O(1), one O(2), one O(3), and one O(8) atom to form corner-sharing BO4 tetrahedra. In the second B site, B(2) is bonded to one O(2), one O(3), one O(4), and one O(6) atom to form corner-sharing BO4 tetrahedra. In the third B site, B(3) is bonded to one O(3), one O(5), one O(6), and one O(7) atom to form corner-sharing BO4 tetrahedra. In the fourth B site, B(4) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form corner-sharing BO4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a distorted bent 120 degrees geometry to two equivalent Nd(1), one B(2), and one B(4) atom. In the second O site, O(5) is bonded in a distorted bent 120 degrees geometry to two equivalent Nd(1), one B(3), and one B(4) atom. In the third O site, O(6) is bonded in a trigonal planar geometry to one B(2), one B(3), and one B(4) atom. In the fourth O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Nd(1), one B(3), and one B(4) atom. In the fifth O site, O(8) is bonded in a distorted bent 120 degrees geometry to two equivalent Nd(1) and two equivalent B(1) atoms. In the sixth O site, O(1) is bonded in a distorted single-bond geometry to three equivalent Nd(1) and one B(1) atom. In the seventh O site, O(2) is bonded in a bent 120 degrees geometry to two equivalent Nd(1), one B(1), and one B(2) atom. In the eighth O site, O(3) is bonded in a trigonal planar geometry to one B(1), one B(2), and one B(3) atom.
Nd2B8O15 crystallizes in the monoclinic P2/c space group. Nd(1) is bonded in a 11-coordinate geometry to one O(7), one O(8), two equivalent O(2), two equivalent O(4), two equivalent O(5), and three equivalent O(1) atoms. The Nd(1)-O(7) bond length is 2.55 Å. The Nd(1)-O(8) bond length is 2.75 Å. There is one shorter (2.62 Å) and one longer (2.71 Å) Nd(1)-O(2) bond length. There is one shorter (2.84 Å) and one longer (2.94 Å) Nd(1)-O(4) bond length. There is one shorter (2.57 Å) and one longer (2.91 Å) Nd(1)-O(5) bond length. There are a spread of Nd(1)-O(1) bond distances ranging from 2.31-2.61 Å. There are four inequivalent B sites. In the first B site, B(1) is bonded to one O(1), one O(2), one O(3), and one O(8) atom to form corner-sharing BO4 tetrahedra. The B(1)-O(1) bond length is 1.43 Å. The B(1)-O(2) bond length is 1.48 Å. The B(1)-O(3) bond length is 1.56 Å. The B(1)-O(8) bond length is 1.46 Å. In the second B site, B(2) is bonded to one O(2), one O(3), one O(4), and one O(6) atom to form corner-sharing BO4 tetrahedra. The B(2)-O(2) bond length is 1.47 Å. The B(2)-O(3) bond length is 1.53 Å. The B(2)-O(4) bond length is 1.44 Å. The B(2)-O(6) bond length is 1.52 Å. In the third B site, B(3) is bonded to one O(3), one O(5), one O(6), and one O(7) atom to form corner-sharing BO4 tetrahedra. The B(3)-O(3) bond length is 1.53 Å. The B(3)-O(5) bond length is 1.48 Å. The B(3)-O(6) bond length is 1.54 Å. The B(3)-O(7) bond length is 1.42 Å. In the fourth B site, B(4) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form corner-sharing BO4 tetrahedra. The B(4)-O(4) bond length is 1.46 Å. The B(4)-O(5) bond length is 1.48 Å. The B(4)-O(6) bond length is 1.52 Å. The B(4)-O(7) bond length is 1.45 Å. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a distorted bent 120 degrees geometry to two equivalent Nd(1), one B(2), and one B(4) atom. In the second O site, O(5) is bonded in a distorted bent 120 degrees geometry to two equivalent Nd(1), one B(3), and one B(4) atom. In the third O site, O(6) is bonded in a trigonal planar geometry to one B(2), one B(3), and one B(4) atom. In the fourth O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Nd(1), one B(3), and one B(4) atom. In the fifth O site, O(8) is bonded in a distorted bent 120 degrees geometry to two equivalent Nd(1) and two equivalent B(1) atoms. In the sixth O site, O(1) is bonded in a distorted single-bond geometry to three equivalent Nd(1) and one B(1) atom. In the seventh O site, O(2) is bonded in a bent 120 degrees geometry to two equivalent Nd(1), one B(1), and one B(2) atom. In the eighth O site, O(3) is bonded in a trigonal planar geometry to one B(1), one B(2), and one B(3) atom.