author(s) : Pryce
date of publication : 1971
source : Min.Mg.(38) p.21-25
formula : (Al,Sb,Fe,Mn,Be)7 (Al,B)(Si,Ta,Sb,Nb,Ti)3 O18
comments about the origin : Pryce 1971
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP