Rb2[Ca(NpO2)2(PO4)2], the First Mixed Alkali-Alkaline Earth Metals Neptunyl(V) Phosphate: Crystal Chemistry and Sheet Stereoisomerism

Fabrice Dal Bo; Tsuyoshi Kohlgruber; Jennifer E.S. Szymanowski; Sergey M. Aksenov; Peter C. Burns

doi:10.1021/acs.cgd.8b01627

Rb₂[Ca(NpO₂)₂(PO₄)₂], the First Mixed Alkali-Alkaline Earth Metals Neptunyl(V) Phosphate: Crystal Chemistry and Sheet Stereoisomerism

Fabrice Dal Bo
, Tsuyoshi Kohlgruber
, Jennifer E.S. Szymanowski
, Sergey M. Aksenov
, Peter C. Burns

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

7 Scopus citations

Abstract

A novel anhydrous neptunyl(V) compound, Rb₂[Ca(NpO₂)₂(PO₄)₂], was obtained by hydrothermal synthesis. It crystallizes in the orthorhombic space group Pbca with the unit-cell parameters a = 12.972(2), b = 13.213(3), c = 7.090(3) Å, V = 1215.3(6) Å³, Z = 4. The crystal structure is based on sheets of neptunyl and phosphate polyhedra representing a new geometrical isomer related to the uranophane-anion topology. The intercalation of calcium in octahedral coordination between adjacent sheets results in a heteropolyhedral framework. This phase is the first inorganic neptunyl compound containing both alkali and alkaline earth metals. The straightforward route used to obtain this compound offers interesting possibilities for the development of a new family of heteropolyhedral framework-type neptunyl oxysalts.

Original language	English
Pages (from-to)	7254-7258
Number of pages	5
Journal	Crystal Growth and Design
Volume	18
Issue number	12
DOIs	https://doi.org/10.1021/acs.cgd.8b01627
State	Published - Dec 5 2018
Externally published	Yes

Funding

This material is based upon research supported by the Materials Science of Actinides, an Energy Frontier Research Centre funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award DESC0001089. We thank the ND Energy Materials Characterization Facility for the use of the electron microprobe. F.D. thanks the WBI-Belgium for a WBI.World postdoctoral grant.

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title = "Rb2[Ca(NpO2)2(PO4)2], the First Mixed Alkali-Alkaline Earth Metals Neptunyl(V) Phosphate: Crystal Chemistry and Sheet Stereoisomerism",

abstract = "A novel anhydrous neptunyl(V) compound, Rb2[Ca(NpO2)2(PO4)2], was obtained by hydrothermal synthesis. It crystallizes in the orthorhombic space group Pbca with the unit-cell parameters a = 12.972(2), b = 13.213(3), c = 7.090(3) {\AA}, V = 1215.3(6) {\AA}3, Z = 4. The crystal structure is based on sheets of neptunyl and phosphate polyhedra representing a new geometrical isomer related to the uranophane-anion topology. The intercalation of calcium in octahedral coordination between adjacent sheets results in a heteropolyhedral framework. This phase is the first inorganic neptunyl compound containing both alkali and alkaline earth metals. The straightforward route used to obtain this compound offers interesting possibilities for the development of a new family of heteropolyhedral framework-type neptunyl oxysalts.",

author = "\{Dal Bo\}, Fabrice and Tsuyoshi Kohlgruber and Szymanowski, \{Jennifer E.S.\} and Aksenov, \{Sergey M.\} and Burns, \{Peter C.\}",

note = "Publisher Copyright: {\textcopyright} 2018 American Chemical Society.",

year = "2018",

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doi = "10.1021/acs.cgd.8b01627",

language = "English",

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T2 - Crystal Chemistry and Sheet Stereoisomerism

AU - Dal Bo, Fabrice

AU - Kohlgruber, Tsuyoshi

AU - Szymanowski, Jennifer E.S.

AU - Aksenov, Sergey M.

AU - Burns, Peter C.

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Y1 - 2018/12/5

N2 - A novel anhydrous neptunyl(V) compound, Rb2[Ca(NpO2)2(PO4)2], was obtained by hydrothermal synthesis. It crystallizes in the orthorhombic space group Pbca with the unit-cell parameters a = 12.972(2), b = 13.213(3), c = 7.090(3) Å, V = 1215.3(6) Å3, Z = 4. The crystal structure is based on sheets of neptunyl and phosphate polyhedra representing a new geometrical isomer related to the uranophane-anion topology. The intercalation of calcium in octahedral coordination between adjacent sheets results in a heteropolyhedral framework. This phase is the first inorganic neptunyl compound containing both alkali and alkaline earth metals. The straightforward route used to obtain this compound offers interesting possibilities for the development of a new family of heteropolyhedral framework-type neptunyl oxysalts.

AB - A novel anhydrous neptunyl(V) compound, Rb2[Ca(NpO2)2(PO4)2], was obtained by hydrothermal synthesis. It crystallizes in the orthorhombic space group Pbca with the unit-cell parameters a = 12.972(2), b = 13.213(3), c = 7.090(3) Å, V = 1215.3(6) Å3, Z = 4. The crystal structure is based on sheets of neptunyl and phosphate polyhedra representing a new geometrical isomer related to the uranophane-anion topology. The intercalation of calcium in octahedral coordination between adjacent sheets results in a heteropolyhedral framework. This phase is the first inorganic neptunyl compound containing both alkali and alkaline earth metals. The straightforward route used to obtain this compound offers interesting possibilities for the development of a new family of heteropolyhedral framework-type neptunyl oxysalts.

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SN - 1528-7483

VL - 18

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JO - Crystal Growth and Design

JF - Crystal Growth and Design

IS - 12

ER -

Rb₂[Ca(NpO₂)₂(PO₄)₂], the First Mixed Alkali-Alkaline Earth Metals Neptunyl(V) Phosphate: Crystal Chemistry and Sheet Stereoisomerism

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