author(s) : Mc Kie and Radford
date of publication : 1959
source : Min.Mag.(32) p.282
formula : (Mg,Al)8 Si4(O,OH)20
comments about the origin : Mc Kie 1962
catalog number(s) : 19545
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP