Associated with epsomite and "hair salts" in soil sheltered by an overhanging bluff. The sulfate is from the oxidation of pyritiferous shales in the bedrock. The cerium dominant ana log of levinsonite-(Y).
Approved IMA 1996 (Dana # Added)
Alum Cave Bluff, Great Smoky Mountains Park, Tennessee, USA. Link to MinDat.org Location Data.
Named for the Cherokee Indian term for the Great Smoky Mountains.