An examination of the thermal expansion of urea using high-resolution variable-temperature X-ray powder diffraction

Robert Hammond; Klimentina Pencheva; Kevin J. Roberts; Patricia Mougin; Derek Wilkinson

doi:10.1107/S0021889805029754

An examination of the thermal expansion of urea using high-resolution variable-temperature X-ray powder diffraction

Robert Hammond, Klimentina Pencheva, Kevin J. Roberts, Patricia Mougin, Derek Wilkinson

School of Engineering & Physical Sciences

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

Variable-temperature high-resolution capillary-mode powder X-ray diffraction is used to assess changes in unit-cell dimensions as a function of temperature over the range 188-328 K. No evidence was found for any polymorphic transformations over this temperature range and thermal expansion coefficients for urea were found to be a_a = (5.27 ± 0.26) × 10^-5 K^-1 and a_c = (1.14 ±0 .057) × 10^-5 K^-1. © 2005 International Union of Crystallography - all rights reserved.

Original language	English
Pages (from-to)	1038-1039
Number of pages	2
Journal	Journal of Applied Crystallography
Volume	38
Issue number	6
DOIs	https://doi.org/10.1107/S0021889805029754
Publication status	Published - Dec 2005

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abstract = "Variable-temperature high-resolution capillary-mode powder X-ray diffraction is used to assess changes in unit-cell dimensions as a function of temperature over the range 188-328 K. No evidence was found for any polymorphic transformations over this temperature range and thermal expansion coefficients for urea were found to be aa = (5.27 ± 0.26) × 10-5 K-1 and ac = (1.14 ±0 .057) × 10-5 K-1. {\textcopyright} 2005 International Union of Crystallography - all rights reserved.",

author = "Robert Hammond and Klimentina Pencheva and Roberts, {Kevin J.} and Patricia Mougin and Derek Wilkinson",

year = "2005",

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AU - Mougin, Patricia

AU - Wilkinson, Derek

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AB - Variable-temperature high-resolution capillary-mode powder X-ray diffraction is used to assess changes in unit-cell dimensions as a function of temperature over the range 188-328 K. No evidence was found for any polymorphic transformations over this temperature range and thermal expansion coefficients for urea were found to be aa = (5.27 ± 0.26) × 10-5 K-1 and ac = (1.14 ±0 .057) × 10-5 K-1. © 2005 International Union of Crystallography - all rights reserved.

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DO - 10.1107/S0021889805029754

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JO - Journal of Applied Crystallography

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ER -

An examination of the thermal expansion of urea using high-resolution variable-temperature X-ray powder diffraction

Abstract

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