Published October 1998 | Version v1
Journal article Metadata-only

Investigation of phase composition and crystal structure in the series of solid solutions of LaCo1-xMnxO3±δ

Creators

  • 1. Ural'skij Gosudarstvennyj Univ., Ekaterinburg (Russian Federation)
  • 2. UrO RAN, Inst. Fiziki Metallov, Ekaterinburg (Russian Federation)

Description

The possibility of obtaining solid solutions of the LaCo1-xMnxO3±δ within the interval of compositions 0.0 ≤ x ≤ 0.6 with 0.05 pitch and within the interval of 0.7 ≤ x ≤ 1.0 with 0.1 pitch at 1100 Deg C in the air is studied. Existence areas of two series of solid solutions: x ≤ 0.2 - with rhombohedral structure (sp. gr. R3-bar c) and x ≥ 0.5 with orthorhombic structure (sp. gr. Pnma) are established in the studied system. Inter-ion distances are evaluated and estimate of oxygen content in dependence on manganese concentration is carried out. The phase transfer is discussed from the viewpoint of manganese ions availability at different oxidation levels: Mn4+ and Mn3+

Abstract (Russian)

Изучена возможность получения твердых растворов типа LaCo1-xMnxO3±δ в интервале составов 0.0 ≤ x ≤ 0.6 с шагом 0.05; а в в интервале 0.7 ≤ x ≤ 1.0 - с шагом 0.1 при 1100 град C на воздухе. В изученной системе установлены области существования двух рядов твердых растворов: x ≤ 0.2 - с ромбоэдрической структурой (пространственная группа R3-bar c) и х ≥ 0.5 с орторомбической структурой (пространственная группа Pnma). Оценены межионные расстояния и произведен оценочный расчет содержания кислорода в зависимости от концентрации марганца. Фазовый переход обсужден с точки зрения наличия ионов марганца в различных степенях окисления: Mn4+ и Mn3+

Additional details

Additional titles

Original title (Russian)
Исследование фазового состава и кристаллической структуры в ряду твердых расворов LaCo

Publishing Information

Journal Title
Zhurnal Fizicheskoj Khimii
Journal Volume
72
Journal Issue
10
Journal Page Range
p. 1876-1878
ISSN
0044-4537
CODEN
ZFKHA9

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
31037016
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
BOND LENGTHS; COBALT OXIDES; CONCENTRATION RATIO; CRYSTAL LATTICES; LANTHANUM OXIDES; LATTICE PARAMETERS; MANGANESE OXIDES; PHASE STUDIES; PHASE TRANSFORMATIONS; SOLID SOLUTIONS
Descriptors DEC
CHALCOGENIDES; COBALT COMPOUNDS; CRYSTAL STRUCTURE; DIMENSIONS; DISPERSIONS; LANTHANUM COMPOUNDS; LENGTH; MANGANESE COMPOUNDS; MIXTURES; OXIDES; OXYGEN COMPOUNDS; RARE EARTH COMPOUNDS; SOLUTIONS; TRANSITION ELEMENT COMPOUNDS

Optional Information

Notes
16 refs., 2 figs., 1 tab.