Materials Data on AsSe6IF6 by Materials Project
(Se)4AsSe2IF6 crystallizes in the monoclinic P2/c space group. The structure is one-dimensional and consists of eight selenium molecules and one AsSe2IF6 ribbon oriented in the (2, 0, 1) direction. In the AsSe2IF6 ribbon, As5+ is bonded in an octahedral geometry to six F1- atoms. There is two shorter (1.77 Å) and four longer (1.78 Å) As–F bond length. Se+0.33+ is bonded in a single-bond geometry to one I1- atom. The Se–I bond length is 2.76 Å. I1- is bonded in a 6-coordinate geometry to two equivalent Se+0.33+ and four F1- atoms. There are two shorter (3.56 Å) and two longer (3.68 Å) I–F bond lengths. There are three inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one As5+ atom. In the second F1- site, F1- is bonded in a single-bond geometry to one As5+ and one I1- atom. In the third F1- site, F1- is bonded in a single-bond geometry to one As5+ and one I1- atom.