Search Mineralpedia – A Mineral Photo Database and Identification Guide
Named in honor of William Edmond Logan, the first Director of the Canadian Geological Survey as the type locality for this mineral is found at the Francon quarry in Montréal, Québec, Canada. Weloganite can be found only in Canada where it occurs with and in alkali intrusive rocks, and at a locality in South Africa. Weloganite is pyroelectric, meaning it generates a temporary charge when heated, and it also has a blue triboluminescence, or light that is generated when broken due to the breaking of the chemical bonds.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/weloganite.pdf
IMA approved (IMA 2012-030). Publlished in Mineral News v. 28 N. 9, Sept. 2012 Igor Pekov, Anthony Nikischer, Martin Jensen, Joseph Leising. Occurs as splendid fiery orange to amber colored doubly terminated, hexagonal crystals to 1mm. Whitecapsite forms in late supergene enriched zones with corroded realgar.