certainty of origin : Donated directly by the Author.
author(s) : Nefedov and Mokievsky
date of publication : 1953
source : Vses.Min.Obsch.,Leningrad (82) p.311-317
formula : Cr-alumohydrocalcite
comments about the origin : Musee Tschernichew (Leningrad) 1972
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP