close

Вход

Забыли?

вход по аккаунту

?

код для вставки
2004
Equilibria
E 4000
44- 016
Phase Equilibria in the Bi2TeO5—Bi2SeO5 System and a High Temperature Neutron Powder Diffraction Study of Bi2SeO5. — Bi 2SeO5 is synthesized by sintering
stoichiometric amounts of Bi2O3 and SeO2 at 600 °C and characterized by powder neutron diffraction in the temperature range 25—650 °C and SHG measurements. The
compound crystallizes in the space group Abm2 and there are no major changes in the
structure at high temperatures. SHG reveals a phase transition at about 250 °C. It is suggested that the mechanism of the phase transformation is an order—disorder transition
involving reorientation of the SeO3 group. The phase diagram of the Bi2TeO5—Bi2SeO5
system is presented and interpreted as a quasibinary peritectic one with wide ranges of
solid solutions based on both compounds. — (DITYATYEV, O. A.; SMIDT, P.;
STEFANOVICH, S. Y.; LIGHTFOOT*, P.; DOLGIKH, V. A.; OPPERMAN, H.;
Solid State Sci. 6 (2004) 9, 915-922; Sch. Chem., Univ. St. Andrews, St. Andrews,
Fife KY16 9ST, UK; Eng.) — W. Pewestorf
Документ
Категория
Без категории
Просмотров
0
Размер файла
10 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа