Syntheses of hollandite type Rb2Cr8O16, K2Cr2V6O16 and K2V8O16 |
| |
Authors: | H Okada N Kinomura S Kume M Koizumi |
| |
Affiliation: | Institute of Scientific and Industrial Research, Osaka University, Suita, Osaka 565, Japan |
| |
Abstract: | Hollandite-type compounds, Rb2Cr8O16, K2Cr2V6O16 and K2V8O16, were synthesized under high P-T conditions up to 1200°C and 7GPa. The structural refinement using a single crystal of Rb2Cr8O16 confirms that the structure is similar to that of K2Cr8O16. Magnetic measurements indicate that Rb2Cr8O16 is ferromagnetic below 295K, K2Cr2V6O16 paramagnetic down to 77K and K2V8O16 has susceptibility anomaly at 175K. These compounds are all semiconductive and show discontinuities in temperature-resistivity curves at points corresponding to magnetic anomalies. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|