Nalini, G and Row, Guru TN (2003) Phase transitions in $A_4Li(HSO_4)_3(SO_4)$; A = Rb, K: Single crystal Xray diffraction studies. In: Journal of Chemical Sciences., 115 (56). pp. 473490.

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Abstract
Abstract. The crystal structure of ferroelastic $Rb_4Li(HSO_4)_3(SO_4)$ has been determined at two temperatures, which indicates a structural phase transition, tetragonal $P4_3$ with $a = 7 \cdot 629(1) \AA $, $c = 29 \cdot 497(2) \AA $ at 293 K and monoclinic $P2_1$ with $a =7 \cdot 583(3) \AA $, $b = 29 \cdot 230(19) \AA $, $c = 7 \cdot 536(5) \AA $, $\beta = 90 \cdot 14(1)°$ at 90 K. The crystal structure of $K_4Li(HSO_4)_3(SO_4)_4$ has also been determined at two temperatures, tetragonal $P4_1$ with $a = 7 \cdot 405(1) \AA $, $c = 28 \cdot 712(6) \AA $ at 293 K and tetragonal $P4_1$ with $a = 7 \cdot 371(5) \AA $, $c = 28 \cdot 522(5) \AA $ at 100 K. The overall coordination features in both the structures have been analysed in terms of bond valence sum calculations.
Item Type:  Journal Article 

Additional Information:  The Copyright belongs to Indian Academy of Sciences. This paper has also been presented in the conference titled 'Emerging Directions in Chemical Sciences  An International Conference', held at Bangalore, India. 
Keywords:  Phase transition;Ferroelastic;Cryocrystallography;Crystal structure 
Department/Centre:  Division of Chemical Sciences > Solid State & Structural Chemistry Unit 
Date Deposited:  13 Mar 2007 
Last Modified:  19 Sep 2010 04:25 
URI:  http://eprints.iisc.ernet.in/id/eprint/6229 
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