Ilimaussite, a new rare earth-niobium-barium silicate from Ilimaussaq, South Greenland / by E. I. Semenov, M. E. Kazakova and V. J. Bukin . On the mineralogy of pyrochlore from the Ilimaussaq alkaline intrusion, South Greenland / by E. I. Semenov, H. Sorensen and Z. T. Katajeva
