Tungsten concentrations and tungsten EXAFS and XANES data in hydrothermal solutions

Tungsten concentrations in aqueous fluids in equilibrium with tungsten oxides and synthetic scheelite (CaWO3) at pressures up to 50 MPa and temperatures up to 400°C. Further, EXAFS and XANES data for constraining the W species up to 400°C and up to 60 MPa. The dataset consists of i) experimentally determined W concentrations at pressure and temperature in H2O, HCl-solutions and NaCl-solutions; the concentration were determined by the x-ray absorption technique in situ at pressure and temperature; ii) EXAFS and XANES spectra and associated fit results for constraining the W-species in the fluid; iii) results of thermodynamic modelling based on thermodynamic properties derived from the W solubility data and data from the literature.