Mineralpedia Details for Walentaite
Walentaite, named for Dr. Kurt Walenta, major contributor to the mineralogy of arsenates and phosphates and a Professor of Mineralogy at the University of Suttgart in Suttgart, Germany, finds its type locality from the White Elephant mine here in the Black Hills of South Dakota, USA. Found in few localities, Walentaite is a rare secondary mineral, found at the White Elephant mine as an alteration product of lollingite and triphylite-lithiophilite, and at the Griffin’s Find mine in Australia in the oxidixed zone of a gold deposit.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/walentaite.pdf
Walentaite from White Elephant mine, Custer Co., South Dakota, United States
Greenish yellow, flat lying radial sprays of acicular crystals to about 0.75mm in diameter on Quartz.