author(s) : Frondel
date of publication : 1961
source : Canad.Min.(6) p.576-581
formula : (Ca,Fe)2 Y3B3(Si,Al)5 (O,OH)20
comments about the origin : 1)Frondel 1963 <Catalog number : 20870>
. 2) Jaffe 1963 <Catalog number : 20871>
catalog number(s) : 20870,20871
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP