skip to main content

SciTech ConnectSciTech Connect

Title: Phase formation in the Li{sub 2}MoO{sub 4}–Rb{sub 2}MoO{sub 4}–Fe{sub 2}(MoO{sub 4}){sub 3} system and crystal structure of a novel triple molybdate LiRb{sub 2}Fe(MoO{sub 4}){sub 3}

X-ray investigation of solid state interaction of the components in the Li{sub 2}MoO{sub 4}–Rb{sub 2}MoO{sub 4}–Fe{sub 2}(MoO{sub 4}){sub 3} system was carried out, and a subsolidus phase diagram of the said system was constructed. The subsystem Rb{sub 2}MoO{sub 4}–LiRbMoO{sub 4}–RbFe(MoO{sub 4}){sub 2} was shown to be non-quasiternary. Formation of a novel triple molybdate LiRb{sub 2}Fe(MoO{sub 4}){sub 3} was established, conditions of solid state synthesis and crystallization of the compound were found. Its crystal structure (orthorhombic, space group Pnma, Z=4, a=24.3956(6), b=5.8306(1), c=8.4368(2) Å) represents a new structure type and includes infinite two-row ribbons ([Fe(MoO{sub 4}){sub 3}]{sup 3−}){sub ∞} parallel to the b axis and composed of FeO{sub 6} octahedra, terminal Mo(3)O{sub 4} tetrahedra, and bridge Mo(1)O{sub 4} and Mo(2)O{sub 4} tetrahedra connecting two or three FeO{sub 6} octahedra. The ribbons are connected to form 3D framework via corner-sharing LiO{sub 4} tetrahedra. Rubidium cations are 11- and 13-coordinated and located in cavities of this heterogeneous polyhedral framework. - Graphical abstract: Exploring the Li{sub 2}MoO{sub 4}–Rb{sub 2}MoO{sub 4}–Fe{sub 2}(MoO{sub 4}){sub 3} system showed its partial non-quasiternarity and revealed a new compound LiRb{sub 2}Fe(MoO{sub 4}){sub 3} which was structurally studied. - Highlights: • The Li{sub 2}MoO{sub 4}–Rb{sub 2}MoO{sub 4}–Fe{sub 2}(MoO{sub 4}){sub 3} systemmore » study revealed a new compound LiRb{sub 2}Fe(MoO{sub 4}){sub 3}. • Its structure of a new type includes ribbons of FeO{sub 6} octahedra and MoO{sub 4} tetrahedra. • The ribbons are connected into a 3D framework via corner-sharing LiO{sub 4} tetrahedra.« less
Authors:
 [1] ;  [2] ;  [3] ;  [1] ;  [3] ;  [1] ;  [2] ;  [1]
  1. Baikal Institute of Nature Management, Siberian Branch, Russian Academy of Sciences, Sakh'yanova St. 6, Ulan-Ude 670047, Buryat Republic (Russian Federation)
  2. Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Akad. Lavrent'ev Ave. 3, Novosibirsk 630090 (Russian Federation)
  3. (Russian Federation)
Publication Date:
OSTI Identifier:
22309041
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 203; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CATIONS; CRYSTALLIZATION; INTERACTIONS; IRON; IRON OXIDES; LITHIUM; MOLYBDATES; ORTHORHOMBIC LATTICES; PHASE DIAGRAMS; RUBIDIUM; SOLIDS; SPACE GROUPS; SYNTHESIS; X RADIATION