Several arsenate and silicate compounds with interesting structural features have been synthesized by the molten salt flux method. These new materials were characterized by single crystal and powder X-ray diffraction, infrared spectroscopy, magnetic susceptibility, and elemental analysis.
The compounds generally have an open-framework structural network, although some also exhibit layer-like or quasi-low-dimensional features. In the arsenate family of compounds, two copper arsenates, BaCuAs$\sb2$O$\sb7$ and $\rm Na\sb7Cu\sb4(AsO\sb4)\sb5,$ as well as two isomorphous manganese arsenates, NaMn$\sb4$(AsO$\sb4)\sb3$ and KMn$\sb4$(AsO$\sb4)\sb3,$ were synthesized and characterized. In the silicate system, two isostructural copper silicate chlorides, $\rm Na\sb2Rb\sb2Cu\sb4Si\sb{12}O\sb{29}Cl\sb2$ and $\rm Na\sb2Cs\sb2Cu\sb4Si\sb{12}O\sb{29}Cl\sb2,$ were successfully identified.
Our study of structure/property correlations should prove insightful toward a better understanding of the conducting mechanism in technologically important metallic/magnetic oxides and in the development of new materials with desired applications.
| Identifer | oai:union.ndltd.org:RICE/oai:scholarship.rice.edu:1911/14049 |
| Date | January 1996 |
| Creators | Wardojo, Tina Aryani |
| Contributors | Hwu, Shiou-Jyh |
| Source Sets | Rice University |
| Language | English |
| Detected Language | English |
| Type | Thesis, Text |
| Format | 259 p., application/pdf |
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