Citation: Arlt, T.; Armbruster, T. (1999). Single-crystal X-ray structure refinement of cornwallite, Cu5(AsO4)2(OH)4: A comparison with its polymorph cornubite and the (PO4)-analogue pseudomalachite Locality: Clara mine, Oberwolfach, Black Forest, Germany Note: Biso for O2 and O4 switched to match calculated values. Neues Jahrbuch fur Mineralogie, Monatshefte, 1999, pp. 468-480.