The synthesis and thermodynamic properties of strontium fluoromanganite Sr2.5Mn6O12.5 - δf2

M. L. Kovba, Yu Ya Skolis, A. M. Abakumov, J. Hadermann, I. S. Sukhushina

Результат исследований: Вклад в журналСтатьярецензирование

1 Цитирования (Scopus)

Аннотация

The existence of the [SrF0.8O0.1] 2.5[Mn6O12] = Sr2.5Mn 6O12.5 - δF2 compound was established in the SrO-Mn2O3-SrF2 system at 900°C and p(O2) = 1 atm. The crystal structure of strontium fluoromanganite was determined from the X-ray powder diffraction data, electron diffraction, and high-resolution electron microscopy. It can be described in the monoclynic system with four Miller hklm indices: hklm: H = h a*+ k b*+ l c 1 * + m q 1, q 1, q 1 = c 2 * = γc 1 *, γ ≈ 0.632, a ≈ a ≈ 9.72 Å, b ≈ 9.55 Å, c 1 ≈ 2.84 Å, c 2 ≈ 4.49 Å, monoclinic angle γ ≈ 95.6°. The electromotive force method with a solid fluorine ion electrolyte was used to refine the composition of fluoromanganite and determine the thermodynamic functions of its formation from phases neighboring in the phase diagram (SrMn3O6, Mn2O3, SrF2, and oxygen), ΔG°, kJ/mol = -(111.7 ± 1.9) + (89.5 ± 1.5) × 10-3 T.

Язык оригиналаАнглийский
Страницы (с-по)2033-2038
Число страниц6
ЖурналRussian Journal of Physical Chemistry A
Том84
Номер выпуска12
DOI
СостояниеОпубликовано - дек. 2010
Опубликовано для внешнего пользованияДа

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