Materials Data on Te2AsCNF6 by Materials Project
CNAsTe2F6 crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of four hydrogen cyanide molecules and one AsTe2F6 sheet oriented in the (-1, 0, 2) direction. In the AsTe2F6 sheet, As3- is bonded in an octahedral geometry to six F1- atoms. There are a spread of As–F bond distances ranging from 1.76–1.80 Å. There are two inequivalent Te4+ sites. In the first Te4+ site, Te4+ is bonded in a 2-coordinate geometry to two equivalent Te4+ and one F1- atom. There are one shorter (2.70 Å) and one longer (2.71 Å) Te–Te bond lengths. The Te–F bond length is 3.12 Å. In the second Te4+ site, Te4+ is bonded in a 4-coordinate geometry to two equivalent Te4+ and two F1- atoms. There are one shorter (2.96 Å) and one longer (3.02 Å) Te–F bond lengths. There are six inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one As3- atom. In the second F1- site, F1- is bonded in a single-bond geometry to one As3- atom. In the third F1- site, F1- is bonded in a single-bond geometry to one As3- atom. In the fourth F1- site, F1- is bonded in a single-bond geometry to one As3- and two Te4+ atoms. In the fifth F1- site, F1- is bonded in a single-bond geometry to one As3- atom. In the sixth F1- site, F1- is bonded in a single-bond geometry to one As3- and one Te4+ atom.