An infrared spectroscopic study of the incommensurate transitions and related phase changes in $K_2Pb[Cu(NO_2)_2]$ and $[N(CH_3)_4]_2MX_4$ (M = Mn, Co, Cu or Zn and X = Cl or Br)

Ganguly, Somnath and Rao, KJ and Rao, CNR (1985) An infrared spectroscopic study of the incommensurate transitions and related phase changes in $K_2Pb[Cu(NO_2)_2]$ and $[N(CH_3)_4]_2MX_4$ (M = Mn, Co, Cu or Zn and X = Cl or Br). In: Spectrochimica Acta Part A: Molecular Spectroscopy, 41 (1-2). 307 -314.

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Abstract

$K_2Pb[Cu(NO_2)_6$] and $N(CH_3)_4]_2MX_4$ (M = Mn, Co, Cu or Zn and X = Cl or Br) undergo phase transitions which involve incommensurate phases. The transitions have been investigated by examining the changes in the $NO_2$ and $CH_3$ vibration bands in the i.r. spectra. Splitting and broadening of some of the bands across the incommensurate transitions are discussed in the context of geometrical restrictions in the incommensurate phases. The phase transitions have also been characterized using differential scanning calorimetry.

Item Type:	Journal Article
Publication:	Spectrochimica Acta Part A: Molecular Spectroscopy
Publisher:	Elsevier BV.
Additional Information:	Copyright of this article belongs to Elsevier.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	16 Jul 2008
Last Modified:	19 Sep 2010 04:47
URI:	http://eprints.iisc.ac.in/id/eprint/14930

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