Formula: Fe1.535 Cu.415 Zn.05 S2 O22 H28
Name: Melanterite
Unit cell: 14.071 6.505 10.958 90.0 105.69 90.0 , V=965.63
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: 98-rp-53, Locality: Richmond mine, Iron Mountain, California