bytownite

Etymology
, named for the type locality in Bytown (now Ottawa), Canada, but this locality was later discredited. The name, however, was kept.

Noun

 * 1)  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.