Observation of ammonia dihydrate in the AMH-VI structure at room temperature - Possible implications for the outer solar system

J. S. Loveday; R. J. Nelmes; C. L. Bull; H. E. Maynard-Casely; M. Guthrie

doi:10.1080/08957950903162057

Observation of ammonia dihydrate in the AMH-VI structure at room temperature - Possible implications for the outer solar system

J. S. Loveday, R. J. Nelmes, C. L. Bull, H. E. Maynard-Casely, M. Guthrie

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

18 Scopus citations

Abstract

Ammonia dihydrate (ADH) is an important constituent of the outer solar system and its high-pressure behaviour is relevant to the modelling of Titan, Uranus and Neptune. Our neutron diffraction studies show that ADH can exist at room temperature in the substitutionally disordered structure of the ammonia monohydrate (AMH) phase VI. This implies that a solid solution may exist between ADH and AMH at high pressure, and this is of probable importance to models of the outer solar system.

Original language	English
Pages (from-to)	396-404
Number of pages	9
Journal	High Pressure Research
Volume	29
Issue number	3
DOIs	https://doi.org/10.1080/08957950903162057
State	Published - Sep 2009
Externally published	Yes

Funding

We would like to acknowledge the technical assistance of Mr D.J. Francis of the ISIS Facility, and the helpful advice of two anonymous referees. The work was supported by the Engineering and Physical Science Research Council and the Science and Technology Facilities Council.

Funders	Funder number
Engineering and Physical Sciences Research Council
Science and Technology Facilities Council

Keywords

Icy moons
Neutron diffraction
Simple molecular systems

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10.1080/08957950903162057

Cite this

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AU - Bull, C. L.

AU - Maynard-Casely, H. E.

AU - Guthrie, M.

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AB - Ammonia dihydrate (ADH) is an important constituent of the outer solar system and its high-pressure behaviour is relevant to the modelling of Titan, Uranus and Neptune. Our neutron diffraction studies show that ADH can exist at room temperature in the substitutionally disordered structure of the ammonia monohydrate (AMH) phase VI. This implies that a solid solution may exist between ADH and AMH at high pressure, and this is of probable importance to models of the outer solar system.

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KW - Simple molecular systems

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Observation of ammonia dihydrate in the AMH-VI structure at room temperature - Possible implications for the outer solar system

Abstract

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Keywords

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