SPECTROSCOPIC AND CHIROOPTICAL PROPERTIES OF DOPED SILLENITE CRYSTALS.4. ABSORPTION AND CIRCULAR-DICHROISM SPECTRA OF MN-DOPED BI12TIO20

Authors
BURKOV VI EGORYSHEVA AV KARGIN YF VOLKOV VV
Citation
Vi. Burkov et al., SPECTROSCOPIC AND CHIROOPTICAL PROPERTIES OF DOPED SILLENITE CRYSTALS.4. ABSORPTION AND CIRCULAR-DICHROISM SPECTRA OF MN-DOPED BI12TIO20, Inorganic materials, 32(7), 1996, pp. 762-766
Citations number
21
Journal title
Inorganic materials → ACNP
ISSN journal
00201685
Volume
32
Issue
7
Year of publication
1996
Pages
762 - 766
Database
ISI
SICI code
0020-1685(1996)32:7<762:SACPOD>2.0.ZU;2-D
Abstract
The optical absorption, circular dichroism (CD), and optical rotation spectra of undoped and Mn-doped Bi12TiO20 crystals were investigated i n the visible and near-IR spectral ranges. The absorption and CD bands were identified under the assumption that the [MnO4](n-) complexes ha ve T-d symmetry. Vacuum annealing reduces the Mn4+ ion in Bi12TiO20[Mn ] to Mn2+; subsequent annealing in an oxidizing medium causes the reve rse transition.