%0 Journal Article
%T Indium-Carrier Minerals in Polymetallic Sulphide Ore Deposits: A Crystal Chemical Insight into an Indium Binding State Supported by X-ray Absorption Spectroscopy Data
%A Maria-Ondina Figueiredo
%A Teresa Pereira da Silva
%A Daniel de Oliveira
%A Diogo Rosa
%J Minerals
%D 2012
%I MDPI AG
%R 10.3390/min2040426
%X Indium is a typical chalcophile element of the Earth¡¯s crust, with a very low average content that seldom forms specific minerals, occurring mainly as dispersed in polymetallic sulphides. Indium recovery is based primarily on zinc extraction from sphalerite, the prototype of so-called tetrahedral sulphides, wherein metal ions fill half of the available tetrahedral sites within the cubic closest packing of sulphur anions, leaving interstices accessible for further in-filling. Ascertaining the tendency towards the establishment of In-In interactions through an x-ray absorption spectroscopy approach would efficiently contribute to understanding the behavior of indium in the carrier mineral. The successful results of applying such a near-edge absorption (XANES) study at In L 3-edge to samples collected at the Lagoa Salgada polymetallic orebody in the Iberian Pyrite Belt (IPB) are described and the crystal chemistry of indium is re-evaluated, disclosing a potential clue for the metal binding state in polymetallic sulphides.
%K indium
%K carrier minerals
%K polymetallic sulphide deposits
%K Iberian Pyrite Belt
%K crystal chemistry
%K XANES
%U http://www.mdpi.com/2075-163X/2/4/426