author(s) : Blumrich
date of publication : 1893
source : Tsch.Min.Mitth.(13) p.472
formula : Na,Ca,Ti,Zr silicate
comments about the origin : Universite de Prague, echantillons originaux (No10730)
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP