(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Wartha, R., Palfi, A., Niedermayr, G., Brandstätter, F. and Petersen, O. V. (2001): Der Aris-Phonolith-Komplex und seine Mineralien. In Bahmann, U. and A. (Eds.), Namibia – Zauberwelt edler Steine und Kristalle, Bode-Verlag, Haltern, Germany, pp. 172-179. (in German); [http://www.koeln.netsurf.de/~w.steffens/aris.htm]
