Dual speciation of nitrogen in silicate melts at high pressure and temperature: An experimental study

Mass transfer in the Earth’s interior: fluid-melt interaction in aluminosilicate–C–O–H–N systems at high pressure and temperature under oxidizing conditions

“…6a, b). The peaks are Gaussian in shape, which is similar to that reported by Roskosz Mysen and Cody (2006) in Raman spectra of N 2 -saturated silicate glasses quenched from melts at pressures ≥ 1 GPa. In contrast, gaseous N 2 spectra have sharp Lorentzian peaks.…”

“…The (Na 2 Si 4 O 9 ) 90 (Na(NaAl) 4 O 9 ) 1o glass was from the batch originally synthesized by Mysen (2007), but remelted and quenched to glass to be used for starting materials here in order to eliminate incipient crystals and adsorbed and water that may contributed to the sample during its storage. The Ag 2 C 2 O 4 breaks down to metallic Ag and CO 2 gas in between 150°and 200°C and AgN 3 to metallic Ag and N 2 gas under similar temperature conditions (Boettcher et al 1973;Roskosz Mysen and Cody, 2006). A few experiments were also conducted with Ag 2 C 2 O 4 + H 2 O only in order to generate reference spectra of volatiles in the COH fluid system.…”

“…The N=N stretch vibrations from molecular N 2 dissolved in silicate melts at high pressure result in Raman bands slightly above 2300 cm −1 (Roskosz Mysen and Cody, 2006). The spectra of fluids and melts in the silicate-C-O-H-N system exhibit a single sharp line near 2320 cm −1 after the background from second-order Raman peaks in this region from the diamonds in the diamond cell, itself, was subtracted (Fig.…”

Nitrogen isotopes in ophiolitic metagabbros: A re-evaluation of modern nitrogen fluxes in subduction zones and implication for the early Earth atmosphere

“…Libourel et al, 2003;Roskosz et al, 2006). However, these studies were undertaken in anhydrous conditions and the occurrence of NH 3 might actually be more significant than determined experimentally.…”

Speciation and solubility of reduced C–O–H–N volatiles in mafic melt: Implications for volcanism, atmospheric evolution, and deep volatile cycles in the terrestrial planets

“…In this case, melts and fluids in the deep upper mantle and below will contain reduced C-O-H-N species, which will impose a control on melting and metasomatic processes in the deep mantle (Roskosz et al, 2006;Mysen et al, 2009;Litasov et al, 2014). Reduced magmatic volatiles are also relevant to Mars and the Moon, as their mantles have f O2 ranging from IW-1 to IW+1 and IW-2 to IW, respectively (Karner et al, 2006;Wadhwa, 2008).…”