AM_Guanacoite Formula: Cu1.87 Mg3.13 As2 O16 H12 Name: Guanacoite Unit cell: 5.459 16.808 6.917 90.0 100.44 90.0 , V=624.16 Space group: P121/C1 (14)

Kyono A , American Mineralogist , 93 (2008) p.501-507, Compositional variability and crystal structural features of guanacoite, Locality: El Guanaco mine, Chile