Proton mobility in hydrated niobium oxophosphate
- 1. RAN, Moscow (Russian Federation). Inst. Obshchej i Neorganicheskoj Khimii
- 2. RAN, Moscow (Russian Federation). Inst. Fizicheskoj Khimii
Description
NbOPO4x3H2O (1) composition hydrated niobium oxyphosphate is synthetized via boiling down of niobium oxide solutions in hydrofluoric or nitric acid with phosphoric acid. The parameters of the elementary cell of the prepared compound are as follows: a=12.249(3), b=1.249(3), c=16.288(3) A, γ=90.740(5) deg. NbOPO4xH2O (2) and NbOPO4 (3) are prepared, as well. By means of 1H NMR it is shown that 1 and 2 contain two hydroxyl groups per formula unit, representing Nb(OH)2PO4x2H2O and Nb(OH)2PO4. Mobility of proton-containing groups in these compounds is studied. Transition enthalpy of protons in a mobile state for 1 and 2 constitutes 17±2 kJ/mole, while activation energy of translational mobility-24±2 and 44±2 kJ/mole, respectively. 7 refs., 3 figs., 2 tabs
Additional details
Additional titles
- Original title (Russian)
- Протонная подвижност' в гидратированном оксифосфате ниобия
Publishing Information
- Journal Title
- Zhurnal Neorganicheskoj Khimii
- Journal Volume
- 41
- Journal Issue
- 8
- Journal Page Range
- p. 1255-1258.
- ISSN
- 0044-457X
- CODEN
- ZNOKAQ
INIS
- Country of Publication
- Russian Federation
- Country of Input or Organization
- Russian Federation
- INIS RN
- 28033029
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Descriptors DEI
- ACTIVATION ENERGY; CHEMICAL COMPOSITION; CHEMICAL PREPARATION; CRYSTAL LATTICES; ENTHALPY; HYDRATES; LATTICE PARAMETERS; MOBILITY; NIOBIUM PHOSPHATES; NMR SPECTRA; PROTONS
- Descriptors DEC
- BARYONS; CATIONS; CHARGED PARTICLES; CRYSTAL STRUCTURE; ELEMENTARY PARTICLES; ENERGY; FERMIONS; HADRONS; HYDROGEN IONS; HYDROGEN IONS 1 PLUS; IONS; NIOBIUM COMPOUNDS; NUCLEONS; OXYGEN COMPOUNDS; PHOSPHATES; PHOSPHORUS COMPOUNDS; PHYSICAL PROPERTIES; SPECTRA; SYNTHESIS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS