NdSe2 crystallizes in the monoclinic P2_1/c space group. Nd(1) is bonded in a 9-coordinate geometry to four equivalent Se(1) and five equivalent Se(2) atoms. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a 5-coordinate geometry to four equivalent Nd(1) and one Se(1) atom. In the second Se site, Se(2) is bonded to five equivalent Nd(1) atoms to form a mixture of distorted corner and edge-sharing SeNd5 trigonal bipyramids.
NdSe2 crystallizes in the monoclinic P2_1/c space group. Nd(1) is bonded in a 9-coordinate geometry to four equivalent Se(1) and five equivalent Se(2) atoms. There are a spread of Nd(1)-Se(1) bond distances ranging from 3.02-3.25 Å. There are a spread of Nd(1)-Se(2) bond distances ranging from 2.99-3.20 Å. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a 5-coordinate geometry to four equivalent Nd(1) and one Se(1) atom. The Se(1)-Se(1) bond length is 2.49 Å. In the second Se site, Se(2) is bonded to five equivalent Nd(1) atoms to form a mixture of distorted corner and edge-sharing SeNd5 trigonal bipyramids.