“…Hence, its use for either standard experiments, sample mapping, or for in-situ experiments at extreme conditions of temperature, pressure, or oxygen fugacity has increased in the last decade. XANES spectroscopy works for all transition elements (like Cu, Cr, Ti, or Eu; for example, see Berry et al, 2006a,b;Doyle et al, 2016;Burham et al, 2015) up to U for stable element (Caisso et al, 2014) and also for transuranian elements like Americium (Caisso et al, 2015;Prieur et al, 2018). Moreover, for some elements, it is also possible to acquire data at different edges.…”