OH-groups in natural perovskite

Autor(en)

Anton Beran, Eugen Libowitzky

Abstrakt

IR spectra of a natural CaTiO3 perovskite single-crystal showed 2 absorption bands at 3394 and 3326 cm-1 which are attributed to structural OH defects. The 2 bands are weakly pleochroic in a (001) section, but show a more distinct anisotropic behavior in (110) with a stronger component of absorption perpendicular to [001]. A plausible model for the mode of OH incorporation on a preferred at. position is derivable under the assumption of vacancies in the Ca lattice. An OH dipole direction roughly pointing along [110] with O2 oxygens acting as donor oxygens is consistent with the measured pleochroic scheme of the bands.

Organisation(en)

Institut für Mineralogie und Kristallographie

Journal

Phase Transitions: a multinational journal

Band

58

Seiten

211 - 215

Anzahl der Seiten

5

ISSN

0141-1594

DOI

https://doi.org/10.1080/01411599608242405

Publikationsdatum

1996

Peer-reviewed

Ja

ÖFOS 2012

105116 Mineralogie, 1030 Physik, Astronomie

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/ohgroups-in-natural-perovskite(ed4be131-fbaa-4a8f-a350-d09c75e07a37).html