Structural and compositional tuning of layered subnitrides; New complex nitride halides

Michael A. Brogan; Robert W. Hughes; Ronald I. Smith; Duncan H. Gregory

doi:10.1039/c0dt00214c

Structural and compositional tuning of layered subnitrides; New complex nitride halides

Michael A. Brogan, Robert W. Hughes, Ronald I. Smith, Duncan H. Gregory

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

3 Citations (Scopus)

Abstract

New quaternary bimetallic nitride halides and the first examples of quintinary nitride mixed halides have been synthesised in the phase system Ca - Sr - N - Cl - Br. The variation in structure with composition has been investigated by powder X-ray and powder neutron diffraction techniques. All compounds crystallise in the R-3m spacegroup, with the anti-α-NaFeO ₂ structure. The layered compounds exhibit unprecedented coexistent disorder of both cations and anions in which only nitride solely occupies a discrete crystallographic position. [N(Ca,Sr)₂]⁺ layers alternate with halide ions (Cl, Br)^-, which fill the octahedral voids between the positively charged sheets. A dual cationic-anionic substitution approach allows all aspects of the anisotropic structure to be controlled, including the thickness of the ionic layers and the [N(Ca,Sr)₂] ⁺ interlayer spacing.

Original language	English
Pages (from-to)	7153-7158
Number of pages	6
Journal	Dalton Transactions
Volume	39
Issue number	30
DOIs	https://doi.org/10.1039/c0dt00214c
Publication status	Published - Aug 14 2010
Externally published	Yes

All Science Journal Classification (ASJC) codes

Inorganic Chemistry

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10.1039/c0dt00214c

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abstract = "New quaternary bimetallic nitride halides and the first examples of quintinary nitride mixed halides have been synthesised in the phase system Ca - Sr - N - Cl - Br. The variation in structure with composition has been investigated by powder X-ray and powder neutron diffraction techniques. All compounds crystallise in the R-3m spacegroup, with the anti-α-NaFeO 2 structure. The layered compounds exhibit unprecedented coexistent disorder of both cations and anions in which only nitride solely occupies a discrete crystallographic position. [N(Ca,Sr)2]+ layers alternate with halide ions (Cl, Br)-, which fill the octahedral voids between the positively charged sheets. A dual cationic-anionic substitution approach allows all aspects of the anisotropic structure to be controlled, including the thickness of the ionic layers and the [N(Ca,Sr)2] + interlayer spacing.",

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AU - Brogan, Michael A.

AU - Hughes, Robert W.

AU - Smith, Ronald I.

AU - Gregory, Duncan H.

PY - 2010/8/14

Y1 - 2010/8/14

N2 - New quaternary bimetallic nitride halides and the first examples of quintinary nitride mixed halides have been synthesised in the phase system Ca - Sr - N - Cl - Br. The variation in structure with composition has been investigated by powder X-ray and powder neutron diffraction techniques. All compounds crystallise in the R-3m spacegroup, with the anti-α-NaFeO 2 structure. The layered compounds exhibit unprecedented coexistent disorder of both cations and anions in which only nitride solely occupies a discrete crystallographic position. [N(Ca,Sr)2]+ layers alternate with halide ions (Cl, Br)-, which fill the octahedral voids between the positively charged sheets. A dual cationic-anionic substitution approach allows all aspects of the anisotropic structure to be controlled, including the thickness of the ionic layers and the [N(Ca,Sr)2] + interlayer spacing.

AB - New quaternary bimetallic nitride halides and the first examples of quintinary nitride mixed halides have been synthesised in the phase system Ca - Sr - N - Cl - Br. The variation in structure with composition has been investigated by powder X-ray and powder neutron diffraction techniques. All compounds crystallise in the R-3m spacegroup, with the anti-α-NaFeO 2 structure. The layered compounds exhibit unprecedented coexistent disorder of both cations and anions in which only nitride solely occupies a discrete crystallographic position. [N(Ca,Sr)2]+ layers alternate with halide ions (Cl, Br)-, which fill the octahedral voids between the positively charged sheets. A dual cationic-anionic substitution approach allows all aspects of the anisotropic structure to be controlled, including the thickness of the ionic layers and the [N(Ca,Sr)2] + interlayer spacing.

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Structural and compositional tuning of layered subnitrides; New complex nitride halides

Abstract

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