NpPr3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Np(1) is bonded to twelve equivalent Pr(1) atoms to form NpPr12 cuboctahedra that share corners with twelve equivalent Np(1)Pr12 cuboctahedra, edges with twenty-four equivalent Pr(1)Pr8Np4 cuboctahedra, faces with six equivalent Np(1)Pr12 cuboctahedra, and faces with twelve equivalent Pr(1)Pr8Np4 cuboctahedra. Pr(1) is bonded to four equivalent Np(1) and eight equivalent Pr(1) atoms to form PrPr8Np4 cuboctahedra that share corners with twelve equivalent Pr(1)Pr8Np4 cuboctahedra, edges with eight equivalent Np(1)Pr12 cuboctahedra, edges with sixteen equivalent Pr(1)Pr8Np4 cuboctahedra, faces with four equivalent Np(1)Pr12 cuboctahedra, and faces with fourteen equivalent Pr(1)Pr8Np4 cuboctahedra.
NpPr3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Np(1) is bonded to twelve equivalent Pr(1) atoms to form NpPr12 cuboctahedra that share corners with twelve equivalent Np(1)Pr12 cuboctahedra, edges with twenty-four equivalent Pr(1)Pr8Np4 cuboctahedra, faces with six equivalent Np(1)Pr12 cuboctahedra, and faces with twelve equivalent Pr(1)Pr8Np4 cuboctahedra. All Np(1)-Pr(1) bond lengths are 3.64 Å. Pr(1) is bonded to four equivalent Np(1) and eight equivalent Pr(1) atoms to form PrPr8Np4 cuboctahedra that share corners with twelve equivalent Pr(1)Pr8Np4 cuboctahedra, edges with eight equivalent Np(1)Pr12 cuboctahedra, edges with sixteen equivalent Pr(1)Pr8Np4 cuboctahedra, faces with four equivalent Np(1)Pr12 cuboctahedra, and faces with fourteen equivalent Pr(1)Pr8Np4 cuboctahedra. All Pr(1)-Pr(1) bond lengths are 3.64 Å.