Located near Calama.
Refs.:
- 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: 467.: 45, 75, 374, 467, 480.
- Uwe Kolitsch (unpublished analyses of material of Arturo Molina & Maurizio Dini)