ISSN:
1600-5767
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Geosciences
,
Physics
Notes:
The lattice parameters of BiFeO3 were determined with the Straumanis method. At 25–13±0.02 °C, the hexagonal parameters are ah = 5.5799±0.0003, and ch = 13.8670±0.0005 Å. The temperature dependence of the lattice parameters in the range 20–325 °C is given by the equations: ah = 5.5764 Å + 6.06 × 10−5t, and ch = 13.8620 Å + 2.10 × 10−4t. In the range of 344–838 °C, the lattice parameters obey the following equations: ah = 5.5946 + 6.83 × 10−5 t, and ch = 13.7251 + 9.05 × 10−4 t −12.503 × 10−7 t2 + 9.40 × 10−10 t3 − 3.57 × 10−13 t4. By extrapolation of the angular separation of the 11.0 and the 10.4 reflections, the electrical Curie temperature was determined to be 845±5 °C.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0021889872009173
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