X-ray absorption spectroscopy study of the chemistry of «invisible» Au in arsenian pyritesOlga Filimonova, Alexander Trigub, Maximilian Nickolsky, Elena Kovalchuk, Vera Abramova, Mauro Rovezzi, Elena Belogub, Ilya Vikentyev and Boris TagirovE3S Web Conf., 98 (2019) 05007DOI: https://doi.org/10.1051/e3sconf/20199805007