author(s) : Nefedov
date of publication : 1953
source : Mem.Soc.Russ.Min.(82) p.311
formula : (Sr,Ca)2 (B4O5(OH)4 )(B5O6(OH)4 )2 2H2O
comments about the origin : Musee de Leningrad 1972
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP