[Hg{sub 5}O{sub 2}(OH){sub 4}][(UO{sub 2}){sub 2}(AsO{sub 4}){sub 2}]: A complex mercury(II) uranyl arsenate
- Department of Chemistry and Biochemistry, and Center for Actinide Science, Auburn University, Auburn, Alabama 36849 (United States)
Under mild hydrothermal conditions UO{sub 2}(NO{sub 3}){sub 2}.6H{sub 2}O, Hg{sub 2}(NO{sub 3}){sub 2}.2H{sub 2}O, and Na{sub 2}HAsO{sub 4}.7H{sub 2}O react to form [Hg{sub 5}O{sub 2}(OH){sub 4}][(UO{sub 2}){sub 2}(AsO{sub 4}){sub 2}] (HgUAs-1). Single crystal X-ray diffraction experiments reveal that HgUAs-1 possesses a pseudo-layered structure consisting of two types of layers: {sub i}nfinity{sup 2}[Hg{sub 5}O{sub 2}(OH){sub 4}]{sup 2+} and {sub i}nfinity{sup 2}[(UO{sub 2}){sub 2}(AsO{sub 4}){sub 2}]{sup 2-}. The {sub i}nfinity{sup 2}[Hg{sub 5}O{sub 2}(OH){sub 4}]{sup 2+} layers are complex, and contain three crystallographically unique Hg centers. The coordination environments and bond-valence sum calculations indicate that the Hg centers are divalent. The {sub i}nfinity{sup 2}[(UO{sub 2}){sub 2}(AsO{sub 4}){sub 2}]{sup 2-} layers belong to the Johannite topological family. The {sub i}nfinity{sup 2}[Hg{sub 5}O{sub 2}(OH){sub 4}]{sup 2+} and {sub i}nfinity{sup 2}[(UO{sub 2}){sub 2}(AsO{sub 4}){sub 2}]{sup 2-} layers are linked to each other through mu{sub 2}-O bridges that include Hg...O=U=O interactions. - Graphical abstract: A depiction of the coordination environments for mercury in [Hg{sub 5}O{sub 2}(OH){sub 4}][(UO{sub 2}){sub 2}(AsO{sub 4}){sub 2}] (HgUAs-1).
- OSTI ID:
- 21370495
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 7 Vol. 182; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ACTINIDE COMPOUNDS
ARSENATES
ARSENIC COMPOUNDS
COHERENT SCATTERING
CRYSTAL GROWTH
CRYSTALS
DIFFRACTION
HYDROTHERMAL SYNTHESIS
LAYERS
MATERIALS
MERCURY COMPOUNDS
MINERALS
MONOCRYSTALS
NITRATES
NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
RADIOACTIVE MATERIALS
RADIOACTIVE MINERALS
SCATTERING
SYNTHESIS
URANIUM COMPOUNDS
URANIUM MINERALS
URANYL COMPOUNDS
URANYL NITRATES
X-RAY DIFFRACTION