The Inverse Perovskite (Ca 2 EuN x )Sn: A Rare Example for a Homogeneously Mixed‐Valent Compound?

Zeitschrift anorg allge chemie

2013

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Section: (Ca 2 Eun 075 )Sn: a Quaternary Alkaline-earth Metal Perovsmentioning

confidence: 99%

Section: Synthetic Considerationsmentioning

confidence: 99%

Alkaline‐earth Metal Nitrides of the Main‐Group Elements: Crystal Structures and Properties of Inverse Perovskites

Zeitschrift anorg allge chemie

2013

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“…Upon substitution of 1/3 of the alkaline‐earth metal by Eu in (Ca 2 EuN x )Sn, a rather unusual case of a homogeneously mixed‐valent Eu 2+/3+ ‐compound was revealed . In the cubic perovskite, nitrogen deficiency with no indication for (partial) order according to powder X‐ray diffraction and disorder of Ca and Eu over the respective crystallographic site are present.…”

Section: Inverse Perovskite Nitrides Of the Alkaline‐earth Metalsmentioning

confidence: 99%

“…As frequent, the reports on such a cubic binary intermetallic phase may be due to unnoticed impurities of light elements like C, N, or O. The perovskite nitrides of La, Ce, Nd, Pr, and Sm were reported and apparently also (Eu 3 N)Sn can be produced,, , but the uncertainty in valences complicates single phase synthesis of the europium compound as discussed for (Ca 2 EuN x )Sn constituting from mixed‐valent Eu 2+/3+ (see paragraph 2.2) …”

Section: Inverse Perovskite Nitrides Of the Rare‐earth Metalsmentioning

confidence: 99%

“…In such systems, the nitrogen frequently readily substitutes with oxygen or carbon, for example, and nitrogen deficiencies may occur. Thus, synthesis of single phase material is often hindered and requires highly pure substances and gases, exact stoichiometric ratios of all starting materials including the anticipated nitrogen content as well as fully inert crucibles , , , . Few examples of crystal growth for these compounds can be found in literature, mostly as result of elevated temperatures, possibly aided by self‐flux of the metallic components during formation of the final perovskite material , , …”

Section: Synthetic Considerationsmentioning

confidence: 99%

See 1 more Smart Citation

Metal‐Rich Ternary Perovskite Nitrides

2019

Eur J Inorg Chem

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Research interest in inverse perovskite nitrides, since the early beginnings in the 1940s has considerably intensified in recent years. Within the last decades exploration lead to a wide variety of new compounds, compositions and structural arrangements. Electronic properties of the novel materials span from insulating and semiconducting via semimetallic and metallic, depending on element combination. Similarly, magnetic properties qualify for various applications, according to frequently high Curie temperatures and saturation magnetizations, together with development of delicate magnetic structures and often occurring metamagnetic transitions, to give only few examples. This minireview is intended to give an overview on formation of such metal‐rich compounds with focus on chemical systems and crystal chemistry.

Nitrides of Non‐Main Group Elements

Höhn

Handbook of Solid State Chemistry

2017

In the last two decades, there has been a renewed interest in the chemistry of nitrides and nitridometalates. Both binary and higher nitridesMxNyhave already featured prominently as refractory materials, corrosion‐ and mechanical wear‐resistant coatings, hard materials, and hard magnets; thin films are used as diffusion barriers in integrated circuits.Whereas research on binary transition metal nitrides is mostly driven by technical and economic interests, the investigation on nitridometalates primarily focuses on exploration with respect to the development of new synthetic strategies and the design of new materials. Within this field of interest, especially the nitride chemistry of rare earth metals is still comparably undeveloped.Chemical bonding in binary nitrides varies from primarily salt‐like via covalent to metallic, whereas nitridometalates are best described as containing covalent complex anions [MxNy]z−with alkali, alkaline earth, or rare earth metal cations providing electroneutrality.