Mn2PtNiSb2 is half-Heusler-derived structured and crystallizes in the trigonal R3m space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 10-coordinate geometry to one Pt(1), three equivalent Ni(1), three equivalent Sb(1), and three equivalent Sb(2) atoms. In the second Mn site, Mn(2) is bonded to three equivalent Pt(1), one Ni(1), three equivalent Sb(1), and three equivalent Sb(2) atoms to form distorted face-sharing MnNiSb6Pt3 tetrahedra. Pt(1) is bonded in a body-centered cubic geometry to one Mn(1), three equivalent Mn(2), one Sb(2), and three equivalent Sb(1) atoms. Ni(1) is bonded in a body-centered cubic geometry to one Mn(2), three equivalent Mn(1), one Sb(1), and three equivalent Sb(2) atoms. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 10-coordinate geometry to three equivalent Mn(1), three equivalent Mn(2), three equivalent Pt(1), and one Ni(1) atom. In the second Sb site, Sb(2) is bonded in a 10-coordinate geometry to three equivalent Mn(1), three equivalent Mn(2), one Pt(1), and three equivalent Ni(1) atoms.
Mn2PtNiSb2 is half-Heusler-derived structured and crystallizes in the trigonal R3m space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 10-coordinate geometry to one Pt(1), three equivalent Ni(1), three equivalent Sb(1), and three equivalent Sb(2) atoms. The Mn(1)-Pt(1) bond length is 2.72 Å. All Mn(1)-Ni(1) bond lengths are 2.60 Å. All Mn(1)-Sb(1) bond lengths are 3.00 Å. All Mn(1)-Sb(2) bond lengths are 2.92 Å. In the second Mn site, Mn(2) is bonded to three equivalent Pt(1), one Ni(1), three equivalent Sb(1), and three equivalent Sb(2) atoms to form distorted face-sharing MnNiSb6Pt3 tetrahedra. All Mn(2)-Pt(1) bond lengths are 2.64 Å. The Mn(2)-Ni(1) bond length is 2.51 Å. All Mn(2)-Sb(1) bond lengths are 3.15 Å. All Mn(2)-Sb(2) bond lengths are 3.03 Å. Pt(1) is bonded in a body-centered cubic geometry to one Mn(1), three equivalent Mn(2), one Sb(2), and three equivalent Sb(1) atoms. The Pt(1)-Sb(2) bond length is 2.70 Å. All Pt(1)-Sb(1) bond lengths are 2.67 Å. Ni(1) is bonded in a body-centered cubic geometry to one Mn(2), three equivalent Mn(1), one Sb(1), and three equivalent Sb(2) atoms. The Ni(1)-Sb(1) bond length is 2.52 Å. All Ni(1)-Sb(2) bond lengths are 2.58 Å. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 10-coordinate geometry to three equivalent Mn(1), three equivalent Mn(2), three equivalent Pt(1), and one Ni(1) atom. In the second Sb site, Sb(2) is bonded in a 10-coordinate geometry to three equivalent Mn(1), three equivalent Mn(2), one Pt(1), and three equivalent Ni(1) atoms.