High-Pressure Synthesis of Sc5P12N23O3 and Ti5P12N24O2 by Activation of the Binary Nitrides ScN and TiN with NH4F

Eisenburger, Lucien; Weippert, Valentin; Oeckler, Oliver und Schnick, Wolfgang (2021): High-Pressure Synthesis of Sc5P12N23O3 and Ti5P12N24O2 by Activation of the Binary Nitrides ScN and TiN with NH4F. In: Chemistry-A European Journal, Bd. 27, Nr. 57: S. 14184-14188

Abstract

Multinary transition metal nitrides and oxonitrides are a versatile and intriguing class of compounds. However, they have been investigated far less than pure oxides. The compounds Sc5P12N23O3 and Ti5P12N24O2 have now been synthesized from the binary nitrides ScN and TiN, respectively, by following a high-pressure high-temperature approach at 8 GPa and 1400 degrees C. NH4F acts as a mineralizing agent that supports product formation and crystallization. The starting materials ScN and TiN are seemingly an uncommon choice because of their chemical inertness but, nevertheless, react under these conditions. Sc5P12N23O3 and Ti5P12N24O2 crystallize isotypically with Ti5B12O26, consisting of solely vertex-sharing P(O/N)(4) tetrahedra forming two independent interpenetrating diamond-like nets that host TM(O/N)(6) (TM=Sc, Ti) octahedra. Ti5P12N24O2 is a mixed-valence compound and shows ordering of Ti3+ and Ti4+ ions.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Chemie und Pharmazie > Department Chemie
• Themengebiete: 500 Naturwissenschaften und Mathematik > 540 Chemie
• ISSN: 0947-6539
• Sprache: Englisch