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New powder diffraction data for dimorphic KHF2

Published online by Cambridge University Press:  10 January 2013

Angélique Pierrard ,
Patrick Gredin  and
Ariel de Kozak
Angélique Pierrard
Affiliation:
Laboratoire de Cristallochimie du Solide, URA CNRS 1388, Université Pierre-et-Marie-Curie, 4 place Jussieu, 75252 Paris Cedex 05, France
Patrick Gredin
Affiliation:
Laboratoire de Cristallochimie du Solide, URA CNRS 1388, Université Pierre-et-Marie-Curie, 4 place Jussieu, 75252 Paris Cedex 05, France
Ariel de Kozak*
Affiliation:
Laboratoire de Cristallochimie du Solide, URA CNRS 1388, Université Pierre-et-Marie-Curie, 4 place Jussieu, 75252 Paris Cedex 05, France
*
a) Author to whom correspondence should be addressed. E-mail: [email protected]
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Abstract

Potassium hydrogen fluoride KHF2 is tetragonal at room temperature: a=5.667(1) Å, c=6.795(1) Å, d=2.38, Z=4, space group I4/mcm (No. 140). It gives a polymorphic transition at 196 °C to a cubic form: a=6.435(1) Å, Z=4, space group Fm3m, melts at 239 °C, and then dissociates into gaseous HF and solid KF.

Type
Research Article
Information
Powder Diffraction , Volume 11 , Issue 2 , June 1996 , pp. 121 - 122
Copyright
Copyright © Cambridge University Press 1996

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