Abstract
High temperature Guinier photographs of As2O5 indicate a continuous phase transition to HT-As2O5, which is accomplished at 305 ± 3 °C. The crystal structure of HT-As2O5 has been derived from the low temperature form; space group and lattice constants are P41212-D44 and a = 857.2 pm, c = 463.6pm (310 °C), respectively. According to symmetry considerations, the phase transition is expected to be of pure ferroelastic-paraelastic type (422F 222).
Received: 1978-10-2
Published Online: 2014-6-2
Published in Print: 1979-1-1
© 1946 – 2014: Verlag der Zeitschrift für Naturforschung
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