RT Journal Article
T1 The Villalbeto de la Peña Meteorite: RamanSpectroscopy and Cathodoluminescence ofFeldspar
A1 García Guinea, Javier
A1 Sánchez Muñoz, Luis
A1 Torno, J.L.
A1 Crespo Feo, María Elena
A1 Ruiz Pérez, Javier
A1 Martín Herrero, Álvaro Ignacio
A1 Cremades Rodríguez, Ana Isabel
AB 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.
PB American Institute of Physics
SN 0094-243X
YR 2009
FD 2009
LK https://hdl.handle.net/20.500.14352/50180
UL https://hdl.handle.net/20.500.14352/50180
LA eng
DS Docta Complutense
RD 28 sept 2024