Figure 1
(a). The K2[HCr2AsO10] structure at 295 K. The O6—H⋯O5 hydrogen bonds are shown as dashed lines. The labelling of all atoms in the unit cell is given in Supplementary Fig. S1
. (b) The HCr2AsO102− ion of crystal 1, showing the interionic hydrogen bond, with displacement ellipsoids drawn at the 50% probability level. The H atom is shown as a sphere and the hydrogen bond as single lines. [Symmetry code: (i) y − x, −x, z − .] |