Published April 1999 | Version v1
Journal article Metadata-only

Stabilization of a new cuprate La4Sr4Cu8-xNixO18 with anion-deficient perovskite structure

Creators

  • 1. UrO RAN, Inst. Khimii Tverdogo Tela, Ekaterinburg (Russian Federation)

Description

In the La-Sr-Cu-Ni-O system during annealing in air at 970 Deg C at first and then in He atmosphere at 950 Deg C a new complex cuprate of La4Sr4Cu8-xNixO18 (1≤x≤2.0) variable composition with tetragonal structure of anion-deficient perovskite is prepared. Crystal structure of the cuprate prepared was improved by Rietveld method in space group P4-barb2. Formation of the compound is owed to Ni stabilizing effect which high affinity to octahedral surrounding leads to formation of unusual crystal lattice of the phase. Thermal properties of the cuprate prepared are studied in air in 20-1000 Deg C interval

Abstract (Russian)

В системе La-Sr-Cu-Ni-O при прокаливании сначала на воздухе при 970 град C, а затем в атмосфере He при 950 град C получени новый сложный купрат переменного состава La4Sr4Cu8-xNixO18 (1≤x≤2.0) с тетрагональной структурой анионодефицитного перовскита. Кристаллическая структура полученного купрата была уточнена по методу Ритвельда в пространственной группе P4-barb2. Образование соединения обязяно стабилизирующему влиянию Ni, высокая склонность которого к октаэдрическому окружению приводит к формированию необычной кристаллической решетки данной фазы. В интервале температур 20-1000 град C на воздухе изучены термические свойства полученного купрата

Additional details

Additional titles

Original title (Russian)
Стабилизация нового купрата Ла

Publishing Information

Journal Title
Zhurnal Neorganicheskoj Khimii
Journal Volume
44
Journal Issue
4
Journal Page Range
p. 517-524
ISSN
0044-457X
CODEN
ZNOKAQ

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
31064953
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
CHEMICAL COMPOSITION; CHEMICAL PREPARATION; CRYSTAL LATTICES; CUPRATES; DIFFERENTIAL THERMAL ANALYSIS; LANTHANUM COMPOUNDS; LATTICE PARAMETERS; NICKEL COMPOUNDS; STRONTIUM COMPOUNDS
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; COPPER COMPOUNDS; CRYSTAL STRUCTURE; OXYGEN COMPOUNDS; RARE EARTH COMPOUNDS; SYNTHESIS; THERMAL ANALYSIS; TRANSITION ELEMENT COMPOUNDS

Optional Information

Notes
16 refs., 5 figs., 4 tabs.