certainty of origin : Donated directly by the Author.
author(s) : Van Wambeke
date of publication : 1958
source : Bull.Soc.Belge Geol.(67) p.383. Proc. 2nd UN Internat.Conf.Peaceful Uses Atomic Energy (3) p.541
formula : phosphuranylite+thorite, columbite
comments about the origin : Van Wambeke 1966
catalog number(s) : 18860
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP