Garnets in lower crustal ma®c and ultrama®c rocks usually contain rare-earth elements (REE) in trace concentrations. Direct characterization of REE at trace levels in natural garnets is not available in the literature because of the dif®culty of obtaining structural information by means of conventional diffraction methods. Here, the characterization of Nd at trace levels (176±1029 p.p.m.) in a set of natural garnets performed by means of Nd K-edge X-ray absorption nearedge structure spectroscopy is presented, showing the capability of high-energy XANES for REE in trace structural determinations.
New opportunities in trace elements structural characterization: high-energy X-ray absorption near-edge structure spectroscopy.
QUARTIERI, Simona;
2002-01-01
Abstract
Garnets in lower crustal ma®c and ultrama®c rocks usually contain rare-earth elements (REE) in trace concentrations. Direct characterization of REE at trace levels in natural garnets is not available in the literature because of the dif®culty of obtaining structural information by means of conventional diffraction methods. Here, the characterization of Nd at trace levels (176±1029 p.p.m.) in a set of natural garnets performed by means of Nd K-edge X-ray absorption nearedge structure spectroscopy is presented, showing the capability of high-energy XANES for REE in trace structural determinations.File in questo prodotto:
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