AM_Rancieite Formula: Ca1.59 Mn.167 O2.187 Name: Rancieite Unit cell: 2.845 2.845 7.485 90.0 90.0 120.0 , V=52.47 Space group: P11-3 (1)

Ertl A , Pertlik F , Prem M , Post J E , Kim S J , Brandstatter F , Schuster R , European Journal of Mineralogy , 17 (2005) p.163-172, Rancieite crystals from Friesach, Carinthia, Austria, Note: Birnessite group, Locality: Friesach, Carinthia, Austria