certainty of origin : Donated directly by the Author.
author(s) : Nefedov
date of publication : 1955
source : Geologie,Zeits.Geol.East Berlin (4) p.526
formula : goergeyite
comments about the origin : Lab.Leningrad 1972
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP