Selective Crystal Growth and Structural, Optical, and Electronic Studies of Mn3Ta2O8

Karl Rickert, Eric A. Pozzi, Rabi Khanal, Masatoshi Onoue, Giancarlo Trimarchi, Julia E. Medvedeva, Mark C. Hersam, Richard P. Van Duyne, Kenneth R. Poeppelmeier*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Mn3Ta2O8, a stable targeted material with an unusual and complex cation topology in the complicated Mn-Ta-O phase space, has been grown as a ≈3-cm-long single crystal via the optical floating-zone technique. Single-crystal absorbance studies determine the band gap as 1.89 eV, which agrees with the value obtained from density functional theory electronic-band-structure calculations. The valence band consists of the hybridized Mn d-O p states, whereas the bottom of the conduction band is formed by the Ta d states. Furthermore, out of the three crystallographically distinct Mn atoms that are four-, seven-, or eight-coordinate, only the former two contribute their states near the top of the valence band and hence govern the electronic transitions across the band gap. (Graph Presented).

Original languageEnglish (US)
Pages (from-to)6513-6519
Number of pages7
JournalInorganic chemistry
Issue number13
StatePublished - Jul 6 2015

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry


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