Bytown + -ite, named for the type locality in Bytown (now Ottawa), Canada, but this locality was later discredited. The name, however, was kept.
bytownite (usually uncountable, plural bytownites)
- (mineralogy) A plagioclase feldspar, the fifth member of the Albite-Anorthite solid solution series. Bytownite is rare, and normally occurs in small grains in lime-rich igneous rocks. Clear pale yellow crystals have come from Mexico and Oregon.
- “Bytownite” in David Barthelmy, Webmineral Mineralogy Database, 1997–.
- bytownite mindat.org, Hudson Institute of Mineralogy, accessed 29 August 2016