Decay of Hexaniobate Complexes of Mn(IV) and Pt(IV) in Alkaline Solutions: Some New Hexaniobate Salts

Alexandra A. Shmakova, Rishat R. Shiriyazdanov, Albina R. Karimova, Nikolay B. Kompankov, Pavel A. Abramov, Maxim N. Sokolov

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3 Citations (Scopus)

Abstract

This research summarizes the behavior [Mn(Nb6O19)2]12− and [(Nb6O19)2(Pt(OH)2)2]12− in basic solutions at pH 12. After heating of [Mn(Nb6O19)2]12− for 20 min at 60° in the presence of NaOH new very unstable phase Na8[Nb6O19]·25H2O (1) was obtained. Gentle (60 °C) heating of a solution of [(Nb6O19)2(Pt(OH)2)2]12− for 10 min in the presence of NaOH causes rearrangement into [Pt(Nb6O19)2]12−, which was isolated as Na12[Pt(Nb6O19)2]·52H2O (2). Longer heating yields white insoluble amorphous precipitate and crystals of a new hexaniobate phase K5Na3[Nb6O19]·9H2O (3). Crystal structures of the products and their structural relationship with known analogs are discussed.

Original languageEnglish
Pages (from-to)1201-1207
Number of pages7
JournalJournal of Cluster Science
Volume29
Issue number6
DOIs
Publication statusPublished - 1 Nov 2018

Keywords

  • Alkaline solutions
  • Manganese
  • Platinum
  • Polyoxoniobates
  • ROUTE
  • NIOBIUM
  • CRYSTAL-STRUCTURE
  • PLATINUM(IV)
  • PT-195
  • NIOBATES
  • IV
  • SOLID-STATE

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