TY - JOUR
T1 - The energetics of hematite dissolution in iron-oxide-rich melts
T2 - In situ high-temperature calorimetric studies
AU - Morcos, Riham M.
AU - Ellis, Benjamin G.
AU - Navrotsky, Alexandra
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2007/7
Y1 - 2007/7
N2 - Iron-oxide-rich melts are encountered in iron-ore sintering, smelting, and other industrial processes, whereas melts containing iron oxides but richer in silica are the mainstay of igneous processes near the Earth's surface and at depths down to the core-mantle boundary. High-temperature calorimetry has been used to evaluate the enthalpy of solution of Fe2O3 in a series of iron-oxide-based melts at 1353 °C. For a typical melt found in iron-ore sintering, the heat of solution of Fe2O3 is 54.4 ± 5.9 kJ/mol, with no dependence on the Fe2O3 concentration between 59 and 69 mol%. The heat content of a series of samples (59 to 64 mol% Fe2O3), measured by transposed-temperature drop calorimetry, is also independent of composition.
AB - Iron-oxide-rich melts are encountered in iron-ore sintering, smelting, and other industrial processes, whereas melts containing iron oxides but richer in silica are the mainstay of igneous processes near the Earth's surface and at depths down to the core-mantle boundary. High-temperature calorimetry has been used to evaluate the enthalpy of solution of Fe2O3 in a series of iron-oxide-based melts at 1353 °C. For a typical melt found in iron-ore sintering, the heat of solution of Fe2O3 is 54.4 ± 5.9 kJ/mol, with no dependence on the Fe2O3 concentration between 59 and 69 mol%. The heat content of a series of samples (59 to 64 mol% Fe2O3), measured by transposed-temperature drop calorimetry, is also independent of composition.
KW - Heat of solution
KW - Hematite
KW - High-temperature calorimetry
KW - Iron-oxide-rich melts
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U2 - 10.2138/am.2007.2451
DO - 10.2138/am.2007.2451
M3 - Article
AN - SCOPUS:34547479221
VL - 92
SP - 1064
EP - 1070
JO - American Mineralogist
JF - American Mineralogist
SN - 0003-004X
IS - 7
ER -