Materials Data on Nb(SeCl)2 by Materials Project
NbSe2Cl2 crystallizes in the triclinic P-1 space group. The structure is two-dimensional and consists of one NbSe2Cl2 sheet oriented in the (0, 0, 1) direction. Nb5+ is bonded in a 8-coordinate geometry to four Se+1.50- and four Cl1- atoms. There are two shorter (2.64 Å) and two longer (2.66 Å) Nb–Se bond lengths. There are a spread of Nb–Cl bond distances ranging from 2.61–2.65 Å. There are two inequivalent Se+1.50- sites. In the first Se+1.50- site, Se+1.50- is bonded in a 9-coordinate geometry to two equivalent Nb5+ atoms. In the second Se+1.50- site, Se+1.50- is bonded in a 10-coordinate geometry to two equivalent Nb5+ atoms. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a distorted water-like geometry to two equivalent Nb5+ atoms. In the second Cl1- site, Cl1- is bonded in a distorted water-like geometry to two equivalent Nb5+ atoms.