Crystal Chemistry and Site Configuration of the Clinopyroxene from Leucite-bearing Rocks and Related Genetic Significance: the Sabatini Lavas, Roman Region, Italy

A clinopyroxene suite from leucite–bearing lavas located in the Sabatini district of the Roman Volcanic Region has been investigated by single–crystal X–ray diffraction methods combined with electron probe microanalysis. The main aim of the study was to obtain crystallographic data necessary to evaluate intracrystaUine order–disorder relationships in natural clinopyroxenes and related equilibria–disequilibria phenomena in different host–rock types. Generally, the polyhedral site configurations of the clinopyroxenes investigated are interdependent and follow specific variation trends related to... Mehr ...