author(s) : Van Wambeke
date of publication : 1972
source : Bull.Soc.Fr.Min.Crist.(95) p.98
formula : (Th,Pb)1 -x Al3(PO4,SiO4)2 (OH)6
comments about the origin : Van Wambeke 1970
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP