Np2O3 is Corundum structured and crystallizes in the trigonal R-3c space group. Np(1) is bonded to six equivalent O(1) atoms to form a mixture of distorted edge, face, and corner-sharing NpO6 pentagonal pyramids. O(1) is bonded to four equivalent Np(1) atoms to form a mixture of distorted edge and corner-sharing ONp4 trigonal pyramids.
Np2O3 is Corundum structured and crystallizes in the trigonal R-3c space group. Np(1) is bonded to six equivalent O(1) atoms to form a mixture of distorted edge, face, and corner-sharing NpO6 pentagonal pyramids. There are three shorter (2.32 Å) and three longer (2.39 Å) Np(1)-O(1) bond lengths. O(1) is bonded to four equivalent Np(1) atoms to form a mixture of distorted edge and corner-sharing ONp4 trigonal pyramids.