Hydrothermal synthesis, characterization and magnetic properties of NaVGe2O6 and LiVGe2O6
Creators
Description
Supercritical fluids are shown to be an excellent reaction media for the synthesis of novel solid state phases at intermediate temperatures. LiVGe2O6 and NaVGe2O6 have the common pyroxene structure composed of VO6 linear chains. NaVGe2O6 crystallizes in the monoclinic space group C2/c with four formula units having cell dimensions a = 9.960(4) A, b = 8.853(10) A, c = 5.4861(10) A, β = 106.403(3) deg. . The structure was refined until R = 0.0290 and Rw = 0.0370. For LiVGe2O6 in space group P21/c: a = 9.8508(7) A, b = 8.754(3) A, c = 5.3948(13) A, β = 108(3) deg. , R = 0.0240 and Rw = 0.0250. The compounds contain edge-shared VO6 octahedral chains and corner-shared GeO4 tetrahedral chains. The presence of these VO6 chains results in spin-Peierls distortion. Structural and physical characterization of the compounds are reported
Additional details
Identifiers
- DOI
- 10.1016/j.materresbull.2004.04.001;
- PII
- S0025540804000935;
Publishing Information
- Journal Title
- Materials Research Bulletin
- Journal Volume
- 39
- Journal Issue
- 10
- Journal Page Range
- p. 1557-1567
- ISSN
- 0025-5408
- CODEN
- MRBUAC
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 38046971
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- CRYSTAL STRUCTURE; GERMANIUM OXIDES; HYDROTHERMAL SYNTHESIS; MAGNETIC PROPERTIES; MONOCLINIC LATTICES; SILICATE MINERALS; SPACE GROUPS; X-RAY DIFFRACTION
- Descriptors DEC
- CHALCOGENIDES; COHERENT SCATTERING; CRYSTAL LATTICES; CRYSTAL STRUCTURE; DIFFRACTION; GERMANIUM COMPOUNDS; MINERALS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SCATTERING; SYMMETRY GROUPS; SYNTHESIS
Optional Information
- Copyright
- Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.