Polkanovite

As_3.5Rh₆

Lambert-Andron BDhahri, E.Chaudouet, P.Madar, R.

Journal of the Less-Common Metals (1985) 108, 353-358

a=9.315Å   b=9.315Å   c=3.659Å

α=90°   β=90°   γ=120°