A component of bog iron ores; a cement in clays, sands, and bone material; an alteration product of triphylite in granite pegmatites.
Valid Species (Pre-IMA) 1841
Many localities are known; some with well-studied material include: in the Hrbek mine, Svata Dobrotiva (St. Benigna), near Beroun, Czech Republic. In Germany, from the Eleonore and Rot
Link to MinDat.org Location Data.
For its occurrence near Beroun (formerly Beraun), Czech Republic.