R;unan and infrared spectra of pol~uystaIIine samples of bromoform and deuterated bromoform in the temperature range 20-274 I; are reported. Spectra in both the lattice and intramotecular regions are compared with earlier results and interpreted in temls of the known structures of the three phases o
Phase transitions and low-frequency dielectric dispersion in the solid phase of bromoform
โ Scribed by Ashok L. Sharma; Vinod K. Agarwal; Abhai Mansingh
- Publisher
- Elsevier Science
- Year
- 1979
- Tongue
- English
- Weight
- 203 KB
- Volume
- 68
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
โฆ Synopsis
Pbxe transitions in the solid phase of bromoform have been studied by drelectric and differential sunning calorimetric techniques_ Two modifications of the solid phase, solid I and solid II. have been observed above znd below about -3_SaC respectivel_v_ Solid phase I exhibits clear Debye-type dispersion in the 05 to 100 kHz frequenc_r region. ~bile solid phase II exbbits complete dipole freezing_
๐ SIMILAR VOLUMES
Lattice dynamical calculations are reported for two possible space groups (Pnma and Cmc21). The force constants were found by varying the paramete 1's in appropriate semi-empirical inter-atomic potentia1 functions to obtain agreement with observed infra-red absorption frequencies. A frequency distr