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Natural nanomaterials : reappraising the elusive structure of the nano-sized mi...

Ferrihydrite is natural ferric oxyhydroxide occurring exclusively nanocrystalline. With ideal formula 5 Fe2 O3 . 9 H2 O, ferrihydrite is quite abundant in sediments, weathering crusts and mine wastes, being characteristic of red pre-soils formed by loose weathered rock plus mineral debris (regoliths) and commonly designated as “2-line” or “6-line” on the basis of the broadened maxima observed in the X-ray di...

Molybdenite as a rhenium carrier : first results of a spectroscopic approach us...

The chemical and physical properties of rhenium render it a highly demanded metal for advanced applications in important industrial fields. This very scarce element occurs mainly in ores of porphyry copper-molybdenum deposits associated with the mineral molybdenite, MoS2, but it has also been found in granite pegmatites and quartz veins as well as in volcanic gases. Molybdenite is a typical polytype mineral w...

Scarce industrial commodities : a glance at the possible rhenium availability i...

Rhenium incorporation in molybdenite : first results of a XANES study

X-ray absorption spectroscopy at Re L3-edge applied to mine waste materials : a...

Chromophore behaviour of iron, copper, cobalt and antimony in ancient tile, fai...

Inferring the formal oxidation state of 3d metal ions from K-edge XANES spectra...

Lead in jarosite : an X-ray absorption spectroscopy approach

Rhenium in waste material of the sulphur factory from the S. Domingos abandoned...

An approach to the binding state of indium in natural chalcogenides through the...

A study using synchrotron radiation X-ray absorption spectroscopy at In L3-edge is presented, as a contribution to interpret the binding state of indium in natural chalcogenides considering the increase of applications of this scarce metal.