@article{oai:soar-ir.repo.nii.ac.jp:00018089,
 author = {Taishi, Toshinori and Takenaka, Takayuki and Hosokawa, Kazuya and Bamba, Noriko and Hoshikawa, Keigo},
 journal = {Journal of Crystal Growth},
 month = {Oct},
 note = {Potassium tantalate (KTaO3) crystals were grown by directional solidification from various compositions of K2CO3-Ta2O5 melt. When raw materials with the stoichiometric composition (K2CO3:Ta2O5=50:50 mol%) were used, K6Ta10.8O30 crystallized as the primary phase, indicating that KTaO3 melts incongruently. K6Ta10.8O30 is newly found in the K2CO3-Ta2O5 phase diagram and it is stably synthesized at temperatures above 1200 degrees C. In contrast, KTaO3 crystallized when the ratio of K2CO3 was more than 51.5 mol%. There were three kinds of color in the KTaO3-crystallized portions: milky white, colorless transparent and pale yellow. Based on these results, the phase diagram of the K2CO3-Ta2O5 system around the stoichiometric composition of KTaO3 is proposed. (C) 2013 Elsevier B.V. All rights reserved., JOURNAL OF CRYSTAL GROWTH. 380:39-42 (2013)},
 pages = {39--42},
 title = {Growth of potassium tantalate (KTaO3) crystals by directional solidification},
 volume = {380},
 year = {2013}
}