Mineralpedia Details for Olsacherite
Named in honor of Juan Augusto Olsacher, a former Professor of Mineralogy at Cordoba University in Cordoba, Argentina who studied selenium-rich minerals in Argentina. Olascherite is a rare mineral found in Bolivia, Argentina, and Italy among only a few others. It occurs as a secondary mineral in oxidized selenium-rich hydrothermal deposits. Olascherite is pyroelectric.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/olsacherite.pdf
Olsacherite from El Dragón mine, Quijarro, Potosí Dept., Bolivia
Fine, very micro needles in white white mattes with minor Chalcomentie (blue) on metallic Krutaite matrix.