| Reference List: | Ludwig, C.F. (1803) Handbuch der Mineralogie nach A.G. Werner. 2 volumes, Leipzig: 1: 51, 166.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 424.
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