The order–disorder transition of stage-1 graphite fluoroarsenate intercalation compound: the structure of C16AsF6 below 170 K

Abstract

Guinier–Simon X-ray diffraction data for the stage-1 graphite fluoroarsenate intercalation compound, C¹⁶AsF₆, indicate that it undergoes an order–disorder transition at ca. 170 K and has the F-ligands of AsF₆^– anions nestled in adjacent three-fold sets of carbon-atom hexagons of the enclosing graphite layers with three-dimensional (3-D) ordering of the anions in the low-temperature phase.