A pegmatite mine 6 kilometers north of the village of Linópolis.
Ref.: American Mineralogist (1948): 33: 205.
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: 911.
Mineralogical Record: 14: 233.
Rocks & Minerals (1988): 63: 42.