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dc.contributor.authorCarrero Romero, Sergio 
dc.contributor.authorFernández Martínez, Alejandro
dc.contributor.authorPérez López, Rafael 
dc.contributor.authorNieto Liñán, José Miguel
dc.identifier.citationCarrero Romero, S., Fernández Martínez, A., Pérez López, R., Nieto Liñán, J.M.: "Basaluminite structure and its environmental implications". Procedia: Earth and Planetary Science. Vol. 17, págs. 237-240, (2017). DOI: 10.1016/j.proeps.2016.12.080en_US
dc.description.abstractBasaluminite is a nanocrystalline aluminum oxyhydrosulfate of important environmental implications. It is present in areas affected by acid mine drainage and acid sulfate soils, where potential toxic elements present in solution, such as Cu and As, can be retained by co-precipitation or adsorption onto it. Basaluminite has been described as a nanomineral variety of felsöbányaite. In the present study, high-energy X-ray diffraction (HEXD) and extended X-ray adsorption fine structure (EXAFS) experiments were performed to determine the local order of basaluminite nanoparticles. Pair distribution function (PDF) analyses showed that both synthetic and natural basaluminite have identical short-range order, with 1 nm coherent domain size. PDFs also show strong similarities between the local order of basaluminite and felsobanyaite. On the other hand, S K-edge EXAFS showed different structural coordination between natural and synthetic basaluminite, where sulfate in the natural phase were coordinated in outer-sphere positions whereas inner-sphere sulfate was observed in the synthetic samples. Preliminary results indicated that basaluminite is a highly defective felsobanyaite mineral nanoparticle. This nanocrystalline character has therefore important implication in terms of stability in natural condition and contaminant mobility in stream affected by acid sulfate water.en_US
dc.description.sponsorshipWe would like to thank the Regional Government of Andalucia (Spain; P12-RNM-2260), the Spanish Ministry of Economic and Competitiveness (EMPATIA, CGL2013-48460-C2-R) and a grant from Labex OSUG@2020 (investissements d'avenir - ANR10 LABX56) for financial research support. The authors are very grateful to the ESRF (ID31 beamline) and ELETTRA (XAFS beamline) personnel for their assistance during our experiment (20145106).
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.titleBasaluminite structure and its environmental implicationsen_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/Regional Government of Andalucia (Spain) [P12-RNM-2260]
dc.relation.projectIDinfo:eu-repo/grantAgreement/Spanish Ministry of Economic and Competitiveness (EMPATIA) [CGL2013-48460-C2-R]

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