AM_Krohnkite_1
Formula: Cu Na2 S2 O10 H4
Name: Krohnkite
Unit cell: 5.78 12.58 5.48 90.0 71.5 90.0 , V=377.87
Space group: P121/C1 (14)

Dahlman B , Arkiv for Mineralogi och Geologi , 1 (1952) p.339-366, The crystal structures of krohnkite, CuNa2(SO4)2*2H2O and brandtite, MnCa2(AsO4)2*2H2O, Locality: Chuquicamata, Chile