Thermally induced phase transitions in tridymite: an infrared spectroscopy study
Thermally induced phase transitions in tridymite: an infrared spectroscopy study
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DOI：
10.1007/bf00202680
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发表时间：
1995-02
影响因子：
1.4
通讯作者：
D. Cellai;M. Carpenter;R. Kirkpatrick;E. Salje;M. Zhang
中科院分区：
文献类型：
--
作者：
D. Cellai;M. Carpenter;R. Kirkpatrick;E. Salje;M. Zhang
The temperature dependence of the infrared active modes of meteoritic and synthetic tridymite have been investigated between 23 K and 1073 K in IR absorption and IR emission experiments. At room temperature both tridymite samples consist of a mixture of low temperature forms, in different proportions, due to the grinding. The sequence of phase transitions in Steinbach tridymite deduced from the IR data agrees well with recent X-ray and calorimetry studies using identical samples (Cellai et al. 1994). The previously suspected structural phase transition P6322⇔P63/mmcis confirmed by the disappearance of the 470 cm-1mode and a temperature anomaly of the spectral shift of the 790 cm-1mode. Changes in the infrared spectra of synthetic tridymite give a different sequence of phase transitions from those of the meteoritic sample, consistent with the structural phase transitions observed in a29Si MAS NMR investigation using the same sample (Xiao et al. 1993).
