The 56 ka Monte Epomeo Green Tuff (MEGT) resulted from the largest volume explosive eruption Ischia island (south Italy). Its tephra is one of main stratigraphic markers central Mediterranean area. Despite its importance, a detailed characterisation petrography and mineral chemistry MEGT lacking. To fill this gap, we present petrographic description electron microprobe data on samples collected...

INTRODUCTION Incorporating a feldspar chemical bond between alumina filler particles is expected to increase the wear-resistant and flexural strength properties. AIMS AND OBJECTIVES An investigation was carried out to evaluate the influence of the feldspar chemical bonding between alumina filler particles on wear and flexural strength of experimental alumina/feldspar dental composites. It was...

Abstract. Feldspar is an important constituent of airborne mineral dust. Some alkali feldspars exhibit particularly high ice nucleation (IN) activity. This has been related to structural similarities the (101?0) prism planes and (100) feldspar. Here effect generating feldspar surfaces with close orientation by means chemically induced fracturing on IN activity was investigated experimentally. T...

Oxygen isotopes have been equilibrated between muscovite and aqueous alkali chloride solution and between paragonite and alkali chloride solution in the temperature range of 400ø-650øC at I and 1.5 kb fluid pressure. Isotopic equilibrium was inferred from the fact that compatible fractionation factors were obtained using 3 different chemical reactions to produce the mica: (1) muscovite or parag...