“…Previous workers have shown that the LSC family of perovskites expands rapidly at high temperature and constant P O 2 because of the reduction of Co (or other B-site transition-metal dopants, such as Fe, Ni, Cr, etc. ). − Subsequent studies of expansion in reduced oxides, including doped and undoped ceria, ,, doped lanthanum chromite, , and several browmillerite−perovskite intergrowth oxides, − have attempted to separate and quantify the chemical expansion (that part of the expansion due to changes in P O 2 ) from the thermal expansion. To date, however, a complete set of expansion measurements in the LSC family of perovskites (over a wide range of P O 2 and T ) have not been conducted.…”