| Reference List: | Brooke, H.J. and Miller, W.H. (1852) Introduction to Mineralogy by Wm. Phillips, London (1832): 618.
Breithaupt, A. (1841) Vollständige Handbuch der Mineralogie, Vol. 2: 165.
Palache, Charles, Harry Berman & Clifford Frondel (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume II: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 69.
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