DOE OSTI2020
Nb6I11 crystallizes in the orthorhombic Pna2_1 space group. The structure is three-dimensional. there are six inequivalent Nb sites. In the first Nb site, Nb is bonded to five I atoms to form a mixture of distorted corner and edge-sharing NbI5 square pyramids. There are a spread of Nb–I bond distances ranging from 2.87–3.04 Å. In the second Nb site, Nb is bonded to five I atoms to form a mixture of distorted corner and edge-sharing NbI5 square pyramids. There are a spread of Nb–I bond distances ranging from 2.87–3.02 Å. In the third Nb site, Nb is bonded to five I atoms to form a mixture of distorted corner and edge-sharing NbI5 square pyramids. There are a spread of Nb–I bond distances ranging from 2.87–3.03 Å. In the fourth Nb site, Nb is bonded to five I atoms to form a mixture of distorted corner and edge-sharing NbI5 square pyramids. There are a spread of Nb–I bond distances ranging from 2.88–3.05 Å. In the fifth Nb site, Nb is bonded to five I atoms to form a mixture of distorted corner and edge-sharing NbI5 square pyramids. There are a spread of Nb–I bond distances ranging from 2.89–3.00 Å. In the sixth Nb site, Nb is bonded to five I atoms to form a mixture of distorted corner and edge-sharing NbI5 square pyramids. There are a spread of Nb–I bond distances ranging from 2.88–3.01 Å. There are eleven inequivalent I sites. In the first I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the second I site, I is bonded in a bent 150 degrees geometry to two Nb atoms. In the third I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the fourth I site, I is bonded in a 1-coordinate geometry to three Nb atoms. In the fifth I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the sixth I site, I is bonded in a bent 120 degrees geometry to two Nb atoms. In the seventh I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the eighth I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the ninth I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the tenth I site, I is bonded in a bent 120 degrees geometry to two Nb atoms. In the eleventh I site, I is bonded in a 3-coordinate geometry to three Nb atoms.