ErRhPd2B is (Cubic) Perovskite-derived structured and crystallizes in the tetragonal P4/mmm space group. Er(1) is bonded to four equivalent Rh(1) and eight equivalent Pd(1) atoms to form ErPd8Rh4 cuboctahedra that share corners with twelve equivalent Er(1)Pd8Rh4 cuboctahedra, faces with six equivalent Er(1)Pd8Rh4 cuboctahedra, and faces with eight equivalent B(1)Pd4Rh2 octahedra. Rh(1) is bonded in a distorted linear geometry to four equivalent Er(1) and two equivalent B(1) atoms. Pd(1) is bonded to four equivalent Er(1) and two equivalent B(1) atoms to form a mixture of distorted edge, face, and corner-sharing PdEr4B2 octahedra. The corner-sharing octahedral tilt angles range from 0-61°. B(1) is bonded to two equivalent Rh(1) and four equivalent Pd(1) atoms to form BPd4Rh2 octahedra that share corners with six equivalent B(1)Pd4Rh2 octahedra and faces with eight equivalent Er(1)Pd8Rh4 cuboctahedra. The corner-sharing octahedra are not tilted.
ErRhPd2B is (Cubic) Perovskite-derived structured and crystallizes in the tetragonal P4/mmm space group. Er(1) is bonded to four equivalent Rh(1) and eight equivalent Pd(1) atoms to form ErPd8Rh4 cuboctahedra that share corners with twelve equivalent Er(1)Pd8Rh4 cuboctahedra, faces with six equivalent Er(1)Pd8Rh4 cuboctahedra, and faces with eight equivalent B(1)Pd4Rh2 octahedra. All Er(1)-Rh(1) bond lengths are 3.05 Å. All Er(1)-Pd(1) bond lengths are 3.00 Å. Rh(1) is bonded in a distorted linear geometry to four equivalent Er(1) and two equivalent B(1) atoms. Both Rh(1)-B(1) bond lengths are 2.08 Å. Pd(1) is bonded to four equivalent Er(1) and two equivalent B(1) atoms to form a mixture of distorted edge, face, and corner-sharing PdEr4B2 octahedra. The corner-sharing octahedral tilt angles range from 0-61°. Both Pd(1)-B(1) bond lengths are 2.16 Å. B(1) is bonded to two equivalent Rh(1) and four equivalent Pd(1) atoms to form BPd4Rh2 octahedra that share corners with six equivalent B(1)Pd4Rh2 octahedra and faces with eight equivalent Er(1)Pd8Rh4 cuboctahedra. The corner-sharing octahedra are not tilted.