certainty of origin : Donated directly by the Author.
author(s) : Rosenblum and Mosier
date of publication : 1975
source : Am.Min.(60) p.309-315
formula : (Ca,Fe,La,Ce,Pr,Nd,Y,Th)(Nb,Ti)2 O6
comments about the origin : Rosenblum 1975
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP