Cover Picture: Discovery of Elusive K 4 O 6 , a Compound Stabilized by Configurational Entropy of Polarons (Angew. Chem. Int. Ed. 1/2019) | Zendy

Freysoldt Christoph | Zendy; Merz Patrick | Zendy; Schmidt Marcus | Zendy; Mohitkar Shrikant | Zendy; Felser Claudia | Zendy; Neugebauer Jörg | Zendy; Jansen Martin | Zendy

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Cover Picture: Discovery of Elusive K 4 O 6 , a Compound Stabilized by Configurational Entropy of Polarons (Angew. Chem. Int. Ed. 1/2019)

Author(s) -

Freysoldt Christoph,

Merz Patrick,

Schmidt Marcus,

Mohitkar Shrikant,

Felser Claudia,

Neugebauer Jörg,

Jansen Martin

Publication year - 2019

Publication title -

angewandte chemie international edition

Language(s) - English

Resource type - Reports

SCImago Journal Rank - 5.831

H-Index - 550

eISSN - 1521-3773

pISSN - 1433-7851

DOI - 10.1002/anie.201813481

Subject(s) - polaron , cover (algebra) , endothermic process , configuration entropy , entropy (arrow of time) , solid state , chemistry , thermodynamics , materials science , chemical physics , physics , quantum mechanics , electron , engineering , adsorption , mechanical engineering

Discovery of elusive K 4 O 6 an endothermic mixed peroxide–superoxide compound: In the Communication on page 149, M. Jansen et al. report on the synthesis of K 4 O 6 that owes its stability to the configurational entropy of polarons, and thus exists only above a distinct temperature threshold. The puzzling speed at which the all‐solid‐state reactions of formation and decomposition proceed, as a function of temperature, are illustratively documented by a real‐time video.

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