AM_Calcioandyrobertsite
Formula: K Ca Cu5 As5 O22 H6
Name: Calcioandyrobertsite
Unit cell: 19.647 10.087 9.963 90.0 90.0 90.0 , V=1974.46
Space group: PNMA (62)

Sarp H , Cerny R , European Journal of Mineralogy , 16 (2004) p.163-169, Calcio-andyrobertsite-2O, KCaCu5(AsO4)4[AsO2(OH)2]*2H2O: its, description, crystal structure and relation with calcio-andyrobertsite-1M, Locality: Tsumeb, Namibia, Note: polytype 2O