We determined phase relations in FeCr2O4 at 12-28 GPa and 800-1600 degrees C using a multi-anvil apparatus. At 12-16 GPa, FeCr2O4 spinel (chromite) first dissociates into two phases: a new Fe2Cr2O5 phase + Cr2O3 with the corundum structure. At 17-...
PHYSICS OF THE EARTH AND PLANETARY INTERIORS 228 160-169 2014年3月
Phase transitions in NaZnF3 and NaMnF3 were examined up to 24 GPa and 1100 degrees C using a multianvil apparatus. NaZnE3 perovskite transforms to postperovskite above 11-16 GPa at 600-1000 degrees C, and the postperovskite is quenchable at ambien...
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 136(7) 2748-2756 2014年2月
A polar LiNbO3-type (LN-type) titanate ZnTiO3 has been successfully synthesized using ilmenite-type (IL-type) ZnTiO3 under high pressure and high temperature. The first principles calculation indicates that LN-type ZnTiO3 is a metastable phase obt...
J-G Cheng   T. Ishii   H. Kojitani   K. Matsubayashi   A. Matsuo   X. Li   Y. Shirako   J-S Zhou   J. B. Goodenough   C. Q. Jin   M. Akaogi   Y. Uwatoko   
PHYSICAL REVIEW B 88(20) 205114(1-7) 2013年11月
BaIrO3 adopts the 9R polytype structure if it is synthesized at ambient pressure. High-pressure and high-temperature treatments up to 10 GPa have led to other 5H and 6H polytype phases, which are quenchable to the ambient condition. However, the s...