(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Ferguson, A.K. (1978) The occurence of Ramsayite, Titan-Lavenite and a fluorine-rich Eucolite in a nepheline-syenite inclusion from Tenerife, Canary Islands, Contrib Mineral Petrol 66, 15-20.