author(s) : Brock, Gellatly and Von Knorring
date of publication : 1964
source : Min.Mag.(33) p.1057
formula : Na2CaFe3Fe2(OH)2 (AlSi3O11)2
comments about the origin : Von Knorring 1972
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP