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Minerals, Volume 11, Issue 12

December 2021 - 140 articles

Cover Story: Quartz from La Sassa (Tuscany, Italy) presents a unique luminescence related to intrinsic and extrinsic defects in the crystal lattice due to the growth mechanisms in hydrothermal conditions. The paper reports a full investigation of the La Sassa quartz, by a multi-analytical approach encompassing cathodoluminescence optical microscopy (OM-CL), laser-induced fluorescence (LIF), wavelength resolved thermally stimulated luminescence (WR-TSL), trace element analysis by mass spectrometry (ICP-MS), and Raman spectroscopy (RS). The main luminescent centers are identified as alkali-compensated (Li+, Na+, K+) aluminum [AlO4/M+]0 centers substituting for Si, where the recombinations of a self-trapped exciton (STE) or an electron at a nonbridging oxygen hole center (NBOHC) are active. View this paper
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Minerals - ISSN 2075-163X