Abstract
The structures of NaRu2O4 and Na2.7Ru 4O9 are refined using neutron diffraction. NaRu 2O4 is a stoichiometric compound consisting of double chains of edge sharing RuO6 octahedra. Na2.7Ru 4O9 is a non-stoichiometric compound with partial occupancy of the Na sublattice. The structure is a mixture of single, double and triple chains of edge-shared RuO6 octahedra. NaRu2O 4 displays temperature independent paramagnetism with χ0=1.23×10-4emu/molRuOe. Na2.7Ru4O9 is paramagnetic, χ0=2.0×10-4emu/molOe with Θw=-11.8K and a Curie constant of 0.0119 emu/mol Oe K. Specific heat measurements reveal a small upturn at low temperatures, similar to the upturn observed in La 4Ru6O19. The electronic contribution to the specific heat (γ) for Na2.7Ru4O9 was determined to be15 mJ/moleRu K2.
Original language | English (US) |
---|---|
Pages (from-to) | 195-204 |
Number of pages | 10 |
Journal | Journal of Solid State Chemistry |
Volume | 179 |
Issue number | 1 |
DOIs | |
State | Published - Jan 2006 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Inorganic Chemistry
- Materials Chemistry
Keywords
- Bronze
- Ferrite
- NaRu O
- NaRuO
- Paramagnetic
- Ruthenate