Home From N-2 to NHx groups in silicate melts governed by f(H2) at high pressure and temperature From N-2 to NHx groups in silicate melts governed by f(H2) at high pressure and temperature Mysen, Bjorn O.; Yamashita, Shigeru; Chertkova, Nadezda 2008 GEOCHIMICA ET COSMOCHIMICA ACTA