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

Brogan, M.A., Hughes, R.W., Smith, R.I. and Gregory, D.H. (2010) Structural and compositional tuning of layered subnitrides; new complex nitride halides. Dalton Transactions, 39(30), pp. 7153-7158. (doi: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-alpha-NaFeO2 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.

Item Type:Articles
Keywords:BR CHEMISTRY CL COMPLEXES CRYSTAL STRUCTURE-ANALYSIS DIFFRACTION FLUORIDES INTERCALATION IONS METALS SYSTEME TERNARY NITRIDES
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Hughes, Dr Robert and Gregory, Professor Duncan
Authors: Brogan, M.A., Hughes, R.W., Smith, R.I., and Gregory, D.H.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Dalton Transactions
ISSN:1477-9226

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