Single-crystal infrared and Raman spectroscopic study of methylammonium and propylammonium tetrachloromanganate(II), (MAMC and PAMC)
- 2 February 1978
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 11 (3), 617-632
- https://doi.org/10.1088/0022-3719/11/3/022
Abstract
Infrared reflectance spectra are reported for oriented single crystals of MAMC and PAMC with the electric vector parallel to the anionic sheets for temperatures from 50 to 295K. Single-crystal Raman spectra were also obtained at similar temperatures. The main features of the spectra, particularly for the ambient temperature phases, are assigned with the aid of a factor group analysis. This phase for MAMC, although orthorhombic, behaves spectroscopically as pseudo-tetragonal, but PAMC is plainly orthorhombic. Modes above 260 cm-1 are attributed to cation internal modes, including torsions. The phase III (tetragonal) to phase IV (monoclinic) transition is distinguished in the Raman spectra by disappearance of an intense broad features at about 35 cm-1/.Keywords
This publication has 19 references indexed in Scilit:
- Proton NMR study of the structural phase transitions in perovskite layer compounds: (CnH2n+1NH3)2CdCl4 and (NH3–(CH2)n–NH3) CdCl4The Journal of Chemical Physics, 1977
- NMR investigation of structural phase transitions in the layer structure (CH3ND3)2 MnCl4Solid State Communications, 1976
- X-ray study of structural phase transitions in the perovskite-type layer compound (CH3NH3)2CdCl4Physica Status Solidi (a), 1976
- Differential scanning calorimetry of phase transitions in (CnH2n+1NH3)2MnCl4 compoundsSolid State Communications, 1975
- X-Ray study of the structural first-order phase transition (Cmca-P42/ncm) in (CH3NH3)2CdCl4Physica Status Solidi (a), 1975
- New phase transition in (CnH2n+1NH3)2MnCl4Solid State Communications, 1973
- Investigations of a quasi two-dimensional Heisenberg antiferromagnetic system. Nondeuterated and deuterated alkyl-ammonium-tetrachloromanganateSolid State Communications, 1973
- Single-crystal Raman and far-infrared study of tetramethylammonium trichloromanganate(II)Inorganic Chemistry, 1971
- Calculated and observed vibrational spectra of a linear chain, bent chain, and sheet polymer (α-bismuth pentafluoride, selenium dioxide, and tin tetrafluoride respectively)J. Chem. Soc. A, 1971
- Vibrational spectra and stretching force-constants of tetrahalogeno-complexes of manganese(II)Chemical Communications (London), 1968