title: New opportunities in trace elements structural characterization: high-energy X-ray absorption near-edge structure spectroscopy.
abstract: Garnets in lower crustal mafic and ultramafic 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 difficulty 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 near-edge structure spectroscopy is presented, showing the capability of high-energy XANES for REE in trace structural determinations.
authors.affiliation: Instituto de Ciencia de Materiales de Aragón and Departamento de Física de la Materia Condensada, CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain. jchaboy@posta.unizar.es
authors.forename: J
authors.initials: J
authors.lastname: Chaboy
authors.forename: E
authors.initials: E
authors.lastname: Cotallo
authors.forename: S
authors.initials: S
authors.lastname: Quartieri
authors.forename: F
authors.initials: F
authors.lastname: Boscherini