What is "ephesite"

n. (context mineral English) A monoclinic-prismatic mineral containing aluminum, hydrogen, lithium, oxygen, silicon, and sodium.

Ephesite is a rare member of the mica silicate mineral group, phyllosilicate. It is restricted to quartz-free, alumina rich mineral assemblages and has been found in South African deposits in the Postmasburg district as well as Ephesus, Turkey.