| References: | Mallet (1875) Journal of the Chemical Society, London: 28: 1141; 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: 1085; Clark, 1993 - "Hey's Mineral Index, 3rd Edition." |