Fortes, Andrew D., Wood, Ian Geoffrey, Alfredsson, Maria, Vocadlo, Lidunka, Knight, Kevin S., Marshall, W.G., Tucker, M.G., Fernandez-Alonso, F. (2007) The high-pressure phase diagram of ammonia dihydrate. High Pressure Research, 27 (2). pp. 201-212. ISSN 0895-7959. (doi:10.1080/08957950701265029) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:4778)
| The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. | |
| Official URL: http://dx.doi.org/10.1080/08957950701265029 |
Abstract
We have investigated the P-T phase diagram of ammonia dihydrate (ADH), ND3 center dot 2D(2)O, using powder neutron diffraction methods over the range 0-9 GPa, 170-300 K. In addition to the ambient pressure phase, ADH I, we have identified three high-pressure phases, ADH II, III, and IV, each of which has been reproduced in at least three separate experiments. Another, apparently body-centred-cubic, phase of ADH has been observed on a single occasion above 6 GPa at 170 K. The existence of a dehydration boundary has been confirmed where, upon compression or warming, ADH IV decomposes to a high-pressure ice phase (ice VII or VIII) and a high-pressure phase of ammonia monohydrate (AMH V or VI).
| Item Type: | Article |
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| DOI/Identification number: | 10.1080/08957950701265029 |
| Additional information: | ISI Document Delivery No.: 200GG Times Cited: 0 Cited Reference Count: 38 Fortes, A. D. Wood, I. G. Alfredsson, M. Vocaldo, L. Knight, K. S. Marshall, W. G. Tucker, M. G. Fernandez-Alonso, F. |
| Uncontrolled keywords: | ammonia dihydrate neutron diffraction polymorphism |
| Subjects: | Q Science |
| Divisions: | Divisions > Division of Natural Sciences > Physics and Astronomy |
| Depositing User: | Maria Alfredsson |
| Date Deposited: | 03 Jul 2008 13:23 UTC |
| Last Modified: | 05 Nov 2024 09:36 UTC |
| Resource URI: | https://kar.kent.ac.uk/id/eprint/4778 (The current URI for this page, for reference purposes) |
University of Kent Author Information
Alfredsson, Maria.
| Creator's ORCID: |
 https://orcid.org/0000-0002-2843-1641
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