Formula: Fe.688 Zn1.232 Cu.079 S2 O22 H28
Name: Melanterite
Unit cell: 14.066 6.506 10.938 90.0 105.58 90.0 , V=964.19
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: 91rs209c, Locality: Richmond mine, Iron Mountain, California