Abstract
A novel layered lead titanate with the approximate composition PbTiO2(CO3)(0.3) (NO3)(0.35)(OH) has been synthesized hydrothermally under acidic conditions. The structure has been solved and refined from X-ray and neutron powder diffraction data in the space group P -3 1 m, with cell dimensions a = 5.1787(5) Angstrom and c = 8.5222(7) Angstrom. The titanate layers possess a gibbsite-like structure: lead cations and oxyanions such as carbonate and nitrate are included between the layers. Upon heating the solid loses water, carbon dioxide and nitrogen dioxide and converts via a poorly crystalline intermediate phase to the perovskite PbTiO3. The conversion is complete by 550 degreesC; continued heating results in an increase in crystallinity. (C) 2001 Elsevier Science Ltd. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 1837-1845 |
| Journal | Mater. Res. Bull. |
| Volume | 36 |
| Publication status | Published - 1 Sept 2001 |
Keywords
- layered compound
- hydrothermal synthesis
- X-ray and neutron diffraction