EuNpO3 is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. Np(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form corner-sharing NpO6 octahedra. The corner-sharing octahedral tilt angles range from 37-40°. Eu(1) is bonded in a 8-coordinate geometry to two equivalent O(2) and six equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to two equivalent Np(1) and three equivalent Eu(1) atoms. In the second O site, O(2) is bonded to two equivalent Np(1) and two equivalent Eu(1) atoms to form distorted corner-sharing OEu2Np2 trigonal pyramids.
EuNpO3 is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. Np(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form corner-sharing NpO6 octahedra. The corner-sharing octahedral tilt angles range from 37-40°. Both Np(1)-O(2) bond lengths are 2.28 Å. There are two shorter (2.24 Å) and two longer (2.25 Å) Np(1)-O(1) bond lengths. Eu(1) is bonded in a 8-coordinate geometry to two equivalent O(2) and six equivalent O(1) atoms. There is one shorter (2.43 Å) and one longer (2.57 Å) Eu(1)-O(2) bond length. There are a spread of Eu(1)-O(1) bond distances ranging from 2.46-3.12 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to two equivalent Np(1) and three equivalent Eu(1) atoms. In the second O site, O(2) is bonded to two equivalent Np(1) and two equivalent Eu(1) atoms to form distorted corner-sharing OEu2Np2 trigonal pyramids.