(Tre Croci, Vetralla, Lago di Vico, Viterbo, Lazio, Italia)
Miarolitic cavities in thermometamorphic ejecta from a pyroclastic formation of the Vico volcanic complex.
Host rock: High sanidine, plagioclase, clinopyroxene, clinoamphibole, magnetite and biotite.
The correct locality where piergorite-(Ce), mottanaite-(Ce), muscovite and some other species occur, is "L'Ulivo" at Tre Croci di Vetralla.
Refs.:
Della Ventura, G., Bellatreccia, F., and Williams, C.T. (1999) Zr- and LREE-rich titanite from Tre Croci, Vico Volcanic complex (Latium, Italy). Mineralogical Magazine: 63: 123-130.