A multi-methodological study of the (K,Ca)-variety of the zeolite merlinoite

摘要

A multi-methodological study of the (K,Ca)-variety of the zeolite merlinoite from Fosso Attici, Sacrofano, Italy was carried out on the basis of electron microprobe analysis in wavelength dispersive mode, single-crystal X-ray diffraction (at 100 K), Raman and infrared spectroscopy. The chemical formula of the merlinoite from Fosso Attici is (Na0.37K5.69)(Sigma=6.06)(Mg0.01Ca1.93Ba0.40)(Sigma=2.34)(Fe0.023+Al10.55Si21.38)(Sigma=31.9)O-64 center dot 19.6H(2)O, compatible with the ideal chemical formula K6Ca2[Al10Si22O64]center dot 20H(2)O.