| Reference List: | Semmons (1884), Mineralogical Magazine: 5: xxvi.
Semmons (1884), Mineralogical Magazine: 6: 49, 124.
Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 389.
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