Materials Data on PrNiSb3 by Materials Project
PrNiSb3 crystallizes in the orthorhombic Pbcm space group. The structure is three-dimensional. there are two inequivalent Pr3+ sites. In the first Pr3+ site, Pr3+ is bonded in a 9-coordinate geometry to nine Sb+1.67- atoms. There are a spread of Pr–Sb bond distances ranging from 3.26–3.48 Å. In the second Pr3+ site, Pr3+ is bonded in a 9-coordinate geometry to nine Sb+1.67- atoms. There are a spread of Pr–Sb bond distances ranging from 3.25–3.35 Å. There are two inequivalent Ni2+ sites. In the first Ni2+ site, Ni2+ is bonded to six Sb+1.67- atoms to form a mixture of edge, face, and corner-sharing NiSb6 octahedra. The corner-sharing octahedra tilt angles range from 43–44°. There are a spread of Ni–Sb bond distances ranging from 2.57–2.68 Å. In the second Ni2+ site, Ni2+ is bonded to six Sb+1.67- atoms to form a mixture of distorted edge and corner-sharing NiSb6 octahedra. The corner-sharing octahedral tilt angles are 43°. There are a spread of Ni–Sb bond distances ranging from 2.61–2.64 Å. There are six inequivalent Sb+1.67- sites. In the first Sb+1.67- site, Sb+1.67- is bonded in a 8-coordinate geometry to four equivalent Pr3+ and four Sb+1.67- atoms. There are two shorter (3.10 Å) and two longer (3.14 Å) Sb–Sb bond lengths. In the second Sb+1.67- site, Sb+1.67- is bonded in a 6-coordinate geometry to four Pr3+ and two Ni2+ atoms. In the third Sb+1.67- site, Sb+1.67- is bonded in a 7-coordinate geometry to four Pr3+, two equivalent Ni2+, and one Sb+1.67- atom. The Sb–Sb bond length is 3.12 Å. In the fourth Sb+1.67- site, Sb+1.67- is bonded in a 8-coordinate geometry to four Pr3+ and four Sb+1.67- atoms. There are one shorter (3.12 Å) and two longer (3.14 Å) Sb–Sb bond lengths. In the fifth Sb+1.67- site, Sb+1.67- is bonded in a 4-coordinate geometry to one Pr3+ and four Ni2+ atoms. In the sixth Sb+1.67- site, Sb+1.67- is bonded in a 5-coordinate geometry to one Pr3+, four equivalent Ni2+, and one Sb+1.67- atom.