Formula: Fe.965 Zn.832 Cu.203 S2 O22 H28
Name: Melanterite
Unit cell: 14.073 6.51 10.954 90.0 105.62 90.0 , V=966.49
Space group: P121/C1 (14)

Peterson R C , The Canadian Mineralogist , 41 (2003) p.937-949, The relatinship between Cu content and distortion in the atomic structure, of melanterite from the Richmond mine, Iron Mountain, California, Sample: mati-6, Locality: Richmond mine, Iron Mountain, California