| | Journal (article/letter/editorial) | chemistry and petrogenesis of granular ejecta from the Alban Hills volcano (Central Italy) M. Federico1 and A...Sapienza'', Roma, Italy Dipartimento di Scienze della Terra, Universita di Perugia, Perugia, Italy With 8 Figures...suite of lithics (ejecta) collected from the latest erupted pyroclastic products of the Alban Hills volcano...volcano (Central Italy) has been studied to determine their mineralogical composition and to investigate...ejecta commonly have granular texture and consist of coarse-grained crystals often associated with a ®ne- | | | Journal (article/letter/editorial) | DISTINCT DOMAINS IN “GUARINITE” FROM MONTE SOMMA, ITALY: CRYSTAL STRUCTURES AND CRYSTAL CHEMISTRY Marco...PERCHIAZZI§ Department of Earth Sciences, University of Pisa, via S. Maria 53, I–56126 Pisa, Italy Abstract “Guarinite”...“Guarinite” is a typical accessory mineral of the Monte Somma syenite; it belongs to the cuspidine group...different ways to connect disilicate groups and walls of octahedra; these may all be simultaneously present...same crystal. The domains present in the crystals of “guarinite” have cell type I, II and IV, according |
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