Thermodynamics and phase relationships of transition metal-sulfur systems: Part V. A reevaluation of the Fe-S system using an associated solution model for the liquid phase

The activity of chromite in multicomponent spinels: Implications for T‐fO2 conditions of equilibrated H chondrites

“…Estimates from both studies exceed those recorded by olivine-spinel equilibration. The eutectic melting temperature for alloy + troilite in the system Fe-Ni-S (~990 °C; Chuang et al 1985;Hsieh et al 1987) provides another upper limit on peak temperature as there is no textural evidence for this assemblage having melted during metamorphism (e.g., Dodd 1981), and chondrite bulk compositions have no evidence of chalcophile element depletions consistent with mobilization of a sulfide-rich melt (e.g., Jarosewich 1990). Taking the maximum olivine-spinel temperature for each meteorite and 990 °C as extreme limits for the possible closure temperature for olivineorthopyroxene-alloy assemblages, we calculate that oxygen fugacities for H4-6 chondrites were in the range IW -2.56 to Fig.…”

Retraction: Representation of Reaction Ability for Structural Units in Fe–Al Binary Melts

“…But after checking previous literatures and phase diagram of Fe-Al binary system, Zhang 11) proposed that five molecules as Fe3Al, FeAl, FeAl2, Fe2Al5 and FeAl6 could exist in FeAl binary melts. Other researchers [12][13][14][15][16][17][24][25][26] have reached the similar viewpoint for metallic melts that molecules can exist in metallic melts besides atoms. Several attempts [24][25][26] can well describe the thermodynamic properties of metallic melts on the concept of ionic or molecular constituents associated with artificial parameters, and most of the regressed artificial parameters were obtained by experimental results.…”

“…Other researchers [12][13][14][15][16][17][24][25][26] have reached the similar viewpoint for metallic melts that molecules can exist in metallic melts besides atoms. Several attempts [24][25][26] can well describe the thermodynamic properties of metallic melts on the concept of ionic or molecular constituents associated with artificial parameters, and most of the regressed artificial parameters were obtained by experimental results. 20) Although various experimental technique were adopted to measure the activity of Al and Fe in liquid Fe-Al alloys, to the knowledge of the present authors, no prediction model was established to predict or evaluate the activity of Al and Fe in liquid Fe-Al alloys.…”

Chemical composition of glass and crystalline phases in coarse coal gasification ash

“…These are probably reaction products of pyrite in the original feed coal. Under reducing conditions, such as those developed during gasification, pyrite decomposes at a temperature of around 700 °C to form pyrrhotite and S 2(g) [3] and [27].…”