certainty of origin : Cotype (used for additional information).
author(s) : Broegger
date of publication : 1890
source : Zeits.Kryst.(16) p.478
formula : Th-melanocerite
comments about the origin : Musee d'Oslo 1974
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP