Structure of uranium(VI) oxide dihydrate, UO3. 2H(2)O; synthetic meta-schoepite (UO2)(4)O(OH)(6). 5H(2)O
Structure of uranium(VI) oxide dihydrate, UO3. 2H(2)O; synthetic meta-schoepite (UO2)(4)O(OH)(6). 5H(2)O
The structure of uranium oxide dihydrate, also known as meta-schoepite (UO2)(4)O(OH)(6). 5H(2)O, has been determined from a synthetic single crystal. The structure, at 150 K, space group Pbcn, lattice constants a = 14.6861 (4), b = 13.9799 (3) and c = 16.7063 (5) Angstrom, consists of layers of stoichiometry (UO2)(4)O(OH)(6), formed from edge-sharing UO7 pentagonal bipyramids, interleaved with hydrogen-bonded water molecules. Three of the layer hydroxyl groups are linked through hydrogen bonding to single water molecules and the three remaining OH units form interactions with water molecules that each act as acceptors in two hydrogen bonds. One of the water molecules in the inter-layer region is disordered over two symmetry-related sites and forms hydrogen-bonded interactions only within the layer and with the uranyl O atoms. The relationship of the structure of meta-schoepite to that of schoepite is discussed in detail.
crystal-structure, parameters
577-583
Weller, M. T.
186aa097-9fd5-4c08-88a1-5359c3318c85
Light, M. E.
5f2f6119-008d-4681-8ea0-e32559c94ddd
Gelbrich, T.
6874d813-bf11-4950-b322-dfe77c533f41
1 August 2000
Weller, M. T.
186aa097-9fd5-4c08-88a1-5359c3318c85
Light, M. E.
5f2f6119-008d-4681-8ea0-e32559c94ddd
Gelbrich, T.
6874d813-bf11-4950-b322-dfe77c533f41
Weller, M. T., Light, M. E. and Gelbrich, T.
(2000)
Structure of uranium(VI) oxide dihydrate, UO3. 2H(2)O; synthetic meta-schoepite (UO2)(4)O(OH)(6). 5H(2)O.
Acta Crystallographica Section B: Structural Science, 56, .
(doi:10.1107/S0108768199016559).
Abstract
The structure of uranium oxide dihydrate, also known as meta-schoepite (UO2)(4)O(OH)(6). 5H(2)O, has been determined from a synthetic single crystal. The structure, at 150 K, space group Pbcn, lattice constants a = 14.6861 (4), b = 13.9799 (3) and c = 16.7063 (5) Angstrom, consists of layers of stoichiometry (UO2)(4)O(OH)(6), formed from edge-sharing UO7 pentagonal bipyramids, interleaved with hydrogen-bonded water molecules. Three of the layer hydroxyl groups are linked through hydrogen bonding to single water molecules and the three remaining OH units form interactions with water molecules that each act as acceptors in two hydrogen bonds. One of the water molecules in the inter-layer region is disordered over two symmetry-related sites and forms hydrogen-bonded interactions only within the layer and with the uranyl O atoms. The relationship of the structure of meta-schoepite to that of schoepite is discussed in detail.
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Published date: 1 August 2000
Keywords:
crystal-structure, parameters
Identifiers
Local EPrints ID: 18900
URI: http://eprints.soton.ac.uk/id/eprint/18900
PURE UUID: 03db3e22-6206-45de-b550-907e5a19670f
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Date deposited: 03 Jan 2006
Last modified: 15 Mar 2024 06:09
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Author:
M. T. Weller
Author:
M. E. Light
Author:
T. Gelbrich
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