RuNiSb6 is Skutterudite-derived structured and crystallizes in the monoclinic C2/m space group. Ru(1) is bonded to two equivalent Sb(1), two equivalent Sb(3), and two equivalent Sb(4) atoms to form RuSb6 octahedra that share corners with two equivalent Ru(1)Sb6 octahedra and corners with four equivalent Ni(1)Sb6 octahedra. The corner-sharing octahedral tilt angles are 54°. Ni(1) is bonded to two equivalent Sb(2), two equivalent Sb(3), and two equivalent Sb(4) atoms to form NiSb6 octahedra that share corners with two equivalent Ni(1)Sb6 octahedra and corners with four equivalent Ru(1)Sb6 octahedra. The corner-sharing octahedral tilt angles are 54°. There are four inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 4-coordinate geometry to two equivalent Ru(1) and two equivalent Sb(2) atoms. In the second Sb site, Sb(2) is bonded in a 4-coordinate geometry to two equivalent Ni(1) and two equivalent Sb(1) atoms. In the third Sb site, Sb(3) is bonded in a 4-coordinate geometry to one Ru(1), one Ni(1), and two equivalent Sb(3) atoms. In the fourth Sb site, Sb(4) is bonded in a 4-coordinate geometry to one Ru(1), one Ni(1), and two equivalent Sb(4) atoms.
RuNiSb6 is Skutterudite-derived structured and crystallizes in the monoclinic C2/m space group. Ru(1) is bonded to two equivalent Sb(1), two equivalent Sb(3), and two equivalent Sb(4) atoms to form RuSb6 octahedra that share corners with two equivalent Ru(1)Sb6 octahedra and corners with four equivalent Ni(1)Sb6 octahedra. The corner-sharing octahedral tilt angles are 54°. Both Ru(1)-Sb(1) bond lengths are 2.59 Å. Both Ru(1)-Sb(3) bond lengths are 2.61 Å. Both Ru(1)-Sb(4) bond lengths are 2.60 Å. Ni(1) is bonded to two equivalent Sb(2), two equivalent Sb(3), and two equivalent Sb(4) atoms to form NiSb6 octahedra that share corners with two equivalent Ni(1)Sb6 octahedra and corners with four equivalent Ru(1)Sb6 octahedra. The corner-sharing octahedral tilt angles are 54°. Both Ni(1)-Sb(2) bond lengths are 2.60 Å. Both Ni(1)-Sb(3) bond lengths are 2.57 Å. Both Ni(1)-Sb(4) bond lengths are 2.58 Å. There are four inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 4-coordinate geometry to two equivalent Ru(1) and two equivalent Sb(2) atoms. There is one shorter (2.88 Å) and one longer (3.01 Å) Sb(1)-Sb(2) bond length. In the second Sb site, Sb(2) is bonded in a 4-coordinate geometry to two equivalent Ni(1) and two equivalent Sb(1) atoms. In the third Sb site, Sb(3) is bonded in a 4-coordinate geometry to one Ru(1), one Ni(1), and two equivalent Sb(3) atoms. There is one shorter (2.89 Å) and one longer (3.00 Å) Sb(3)-Sb(3) bond length. In the fourth Sb site, Sb(4) is bonded in a 4-coordinate geometry to one Ru(1), one Ni(1), and two equivalent Sb(4) atoms. There is one shorter (2.89 Å) and one longer (3.00 Å) Sb(4)-Sb(4) bond length.