%0 Journal Article
%A García Guinea, Javier
%A Sánchez Muñoz, Luis
%A Torno, J.L.
%A Crespo Feo, Elena
%A Ruiz Pérez, Javier
%A Martín Herrero, Álvaro Ignacio
%A Cremades Rodríguez, Ana Isabel
%T The Villalbeto de la Peña Meteorite: RamanSpectroscopy and Cathodoluminescence ofFeldspar
%D 2009
%@ 0094-243X
%U https://hdl.handle.net/20.500.14352/50180
%X This paper mainly focuses on the spatial distribution of plagioclase phasesobserved by Raman and spectra cathodoluminescence (CL) emission of in the Villalbeto de laPeña meteorite. Initially, we collected fragments countryside to determine the strewn field areaand to perform spot chemical analyses by electron microprobe for the classification of thespecimens (L6 Chondrite). Furthermore, the hyperspectral Raman mapping allow us identifyamorphous Maskelynite feldspar in plagioclase micro-fissures since it is a molecular technique.The spectra CL emission bands observed at circa 290, 340, 390, 440, 510, 640 and 780 nm arecharacteristic in aluminosilicate lattices providing additional data on H+, OH- and H2O and Na+self-diffusion along interfaces (290 nm), on strained Si—O bonds (340 and 650 nm), on [AlO4]°centers (380-390 nm and 420-440 nm), on O-—Si…M+ centers (510 nm) and on substitutionalFe3+ in aluminum positions (740—800 nm broad band). The CL and hyperspectral Ramantechniques coupling demonstrates that the Villalbeto meteorite was shock-metamorphosed fromthe amorphous Maskelynite presence in Plagioclase fissures and from the strained Si—O bondsat room temperature.
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