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  New Ternary Alkaline Earth Metal Cerium (IV) Nitrides: CaCeN2 and SrCeN2

Prots', Y., Niewa, R., Schnelle, W., & Kniep, R. (2002). New Ternary Alkaline Earth Metal Cerium (IV) Nitrides: CaCeN2 and SrCeN2. Zeitschrift für Anorganische und Allgemeine Chemie, 628(7), 1590-1596. doi:10.1002/1521-3749(200207)628:7<1590:AID-ZAAC1590>3.0.CO;2-F.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-313D-F Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0018-03DF-B
Genre: Journal Article

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 Creators:
Prots', Y., Author
Niewa, R.1, Author              
Schnelle, W.2, Author              
Kniep, R.3, Author              
Affiliations:
1Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
2Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863441              
3Rüdiger Kniep, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863437              

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Free keywords: ternary nitrides; rare-earth elements; crystal structures; order-disorder-transition
 Abstract: CaCeN2 and SrCeN2 were prepared by reactions of Li2CeN2 with Ca3N2 or Sr2N in a nitrogen atmosphere at 1020 K. According to measurements of the magnetic susceptibilities both compounds contain Ce-IV. The crystal structures were determined by full- profile Rietveld refinements of the X-ray powder diffraction patterns. CaCeN2 crystallizes in a rocksalt-type structure with disordered Ca and Ce (space group Fm (3) over barm, a = 499.21(1) pm, R-profile = 0.061, R-Bragg = 0.034). The low temperature modification of SrCeN2 crystallizes in the alpha- NaFeO2 type structure (space group R (3) over barm, a = 362.18(4) pm, c = 1795.8(2) pm, R-profile = 0.085, R-Bragg = 0.031). At elevated temperatures an order-disorder phase transition leads to HT-SrCeN2 (space group Fm (3) over barm, a = 515.01(2) pm, quenched from 1273 K) with a cubic unit cell and complete disorder of Sr and Ce.

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Language(s): eng - English
 Dates: 2002-07
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Degree: -

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Title: Zeitschrift für Anorganische und Allgemeine Chemie
  Alternative Title : Z. Anorg. Allg. Chem.
Source Genre: Journal
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Pages: - Volume / Issue: 628 (7) Sequence Number: - Start / End Page: 1590 - 1596 Identifier: ISSN: 0044-2313