Materials Data on NiSe by Materials Project

NiSe is Millerite structured and crystallizes in the trigonal R3m space group. The structure is three-dimensional. Ni2+ is bonded to five equivalent Se2- atoms to form a mixture of edge and corner-sharing NiSe5 trigonal bipyramids. There are three shorter (2.39 Å) and two longer (2.47 Å) Ni–Se bond lengths. Se2- is bonded in a 5-coordinate geometry to five equivalent Ni2+ atoms.