What is "dyrnaesite-"

Dyrnaesite-(La) is a recently described rare earth phosphate mineral with the formula NaCe(La,REE)(PO). Dyrnaesite-(La) is related to vitusite-(Ce), another rare earth phosphate mineral. It comes from lujavrite, a type of alkaline syenite rock, of South Greenland. Dyrnaesite-(La) is one of few known minerals with essential tetravalent cerium, the other two being cerianite-(Ce) and stetindite.