Formula: Fe1.303 Cu.172 Zn.525 S2 O22 H28
Name: Melanterite
Unit cell: 14.081 6.51 10.997 90.0 105.63 90.0 , V=970.79
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: m2, Locality: Richmond mine, Iron Mountain, California