Crystal chemistry of Te in arsenian pyrite: Economic and environmental implications

Tellurium is important for a number of emeriging green energy technologies, including photovoltaic power, but a severe Te shortage is predicted for the future. The expected results of this proposal will help to better define the ore-forming processes of high-grade Te ores and to develop extraction methods of Te from pyrite to secure its future supply for the green transition. For this purpose natural and synthetic As-bearing (arsenian) pyrite with variable Te contents will be investigated by µ-XANES at the Te LIII edge to study the yet unknown crystallographic position and oxidation state of Te in pyrite.