Published February 2004 | Version v1
Journal article Metadata-only

Phase formation in the Ln2(MoO4)3-Hf(MoO4)2 (Ln=La-Lu, Y, Sc) systems

Creators

  • 1. SO RAN, Bajkal'skij Inst. Prirodopol'zovaniya, Ulan-Ude (Russian Federation)
  • 2. Buryatskij Gosudarstvennyj Univ., Ulan-Ude (Russian Federation)
  • 3. SO RAN, Inst. Neorganicheskoj Khimii, Novosibirsk (Russian Federation)

Description

Interactions in the Ln2(MoO4)3-Hf(MoO4)2 (Ln=La-Lu, Y, Sc) system were studied at 550-750 Deg C using X-ray powder diffraction, differential thermal analysis and IR spectroscopy. New double rare earth and hafnium molybdates Ln2Hf3(MoO4)9 (Ln=La-Tb), Ln2Hf2(MoO4)7 (Ln=Sm-Ho, Y) and Ln2Hf(MoO4)5 (Ln=Tb-Lu, Y) were found. Thermal and crystal parameters were determined. The structure of Dy2Hf2(MoO4)7 (1) was studied by X-ray crystallography. Crystals of 1 are monoclinic with the unit cell parameters: a=20.661(3) A, b=9.816(1) A, c=13.796(3) A, β113.47(1) Deg, space group C2/c, Z=4, R=0.023. Molybdate 1 represents a new structural type

Abstract (Russian)

Методами рентгенофазового, дифференциального термического анализов и ИК-спектроскопии изучено взаимодействие в системах Ln2(MoO4)3-Hf(MoO4)2 (Ln=La-Lu, Y, Sc) при 550-750 град C. Установлено образование новых двойных молибдатов редкоземельных элементов и гафния следующих составов: Ln2Hf3(MoO4)9 (Ln=La-Tb), Ln2Hf2(MoO4)7 (Ln=Sm-Ho, Y) и Ln2Hf(MoO4)5 (Ln=Tb-Lu, Y). Определены термические и кристаллографические характеристики. Методом рентгеноструктурного анализа изучена структура Dy2Hf2(MoO4)7 (1). Кристаллы 1 относятся к моноклинной сингонии с параметрами решетки a=20.661(3) A, b=9.816(1) A, c=13.796(3) A, β113.47(1) град., пр. гр. C2/c, Z=4, R=0.023. Молибдат 1 представляет собой новый структурный тип

Additional details

Additional titles

Original title (Russian)
Фазообразование в системах Лн

Publishing Information

Journal Title
Zhurnal Neorganicheskoj Khimii
Journal Volume
49
Journal Issue
2
Journal Page Range
p. 324-328
ISSN
0044-457X
CODEN
ZNOKAQ

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
36084567
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
CHEMICAL COMPOSITION; CHEMICAL REACTIONS; CRYSTAL LATTICES; LATTICE PARAMETERS; MELTING POINTS; MOLYBDATES; PHASE STUDIES; RARE EARTH COMPOUNDS; SCANDIUM COMPOUNDS; TEMPERATURE RANGE 0400-1000 K; TEMPERATURE RANGE 1000-4000 K; YTTRIUM COMPOUNDS
Descriptors DEC
CRYSTAL STRUCTURE; MOLYBDENUM COMPOUNDS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; REFRACTORY METAL COMPOUNDS; TEMPERATURE RANGE; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS; TRANSITION TEMPERATURE

Optional Information

Notes
13 refs., 1 fig., 5 tabs.