The Crystal Structure of the New Pyroelectric Phase Bi4Te2O9Br2
β Scribed by L.N. Kholodkovskaya; V.A. Dolgikh; B.A. Popovkin
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 142 KB
- Volume
- 116
- Category
- Article
- ISSN
- 0022-4596
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A new phase, Bi 2 Nd 4 O 9 , was synthesized in the binary system Bi 2 O 3 +Nd 2 O 3 and structurally characterized from powder X-ray di4raction data. It crystallizes in monoclinic symmetry with lattice parameters a β«Ψβ¬ 6.7037(2) A s , b β«Ψβ¬ 3.9062(1) A s , c β«Ψβ¬ 3.9542(1) A s , β«Ψβ¬ 125.258(1)3, Z β«
The polymorphic phase transitions of Bi 2 Te 4 O 11 have been investigated using X-ray powder diffraction (XPD), selected area electron diffraction (SAED), and differential scanning calorimetry (DSC) in the 25-730Β°C range. The metastable cubic modification, which forms under fast crystalization of t