XANES and micro-Raman spectroscopy study of the barium titanosilicates BaTiSi2O7 and BaTiSi4O11

被引：0

作者：

Viani, A. ^{[1
]}

Pollastri, S. ^{[2
]}

Macova, P. ^{[1
]}

Palermo, A. ^{[2
]}

Perez-Estebanez, M. ^{[1
]}

Gualtieri, A. F. ^{[2
]}

机构：

[1] Ctr Excellence Telc, Inst Theoret & Appl Mech ASCR, Batelovska 485, Telc 58856, Czech Republic

[2] Univ Modena & Reggio Emilia, Dipartimento Sci Chim & Geol, Via St Eufemia 19, I-41121 Modena, Italy

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2016年 / 122卷 / 04期

关键词：

X-RAY-ABSORPTION; TI K-EDGE; SILICATE-GLASSES; VIBRATIONAL-SPECTRA; TITANIUM COORDINATION; CRYSTAL-STRUCTURE; SINGLE-CRYSTAL; FRESNOITE; RING; BENITOITE;

D O I：

10.1007/s00339-016-9959-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The coordination environment around Ti4+ in the photoluminescent compound BaTiSi2O7 and in BaTiSi4O11 was investigated with X-ray absorption nearedge structure spectroscopy and micro-Raman spectroscopy. The presence of Ti-V in TiO5 pyramidal units with one short Ti-O bond involving the apical oxygen was detected in both compounds. Interpretation of the vibrational signal from the silicate framework suggested that BaTiSi4O11 is a metasilicate containing building units of SiO4 tetrahedra, which are larger than in other barium titanosilicates. These results confirmed the same structural environment of Ti4+ as recently disclosed by structure refinement of BaTiSi2O7 and provided new insights into the unknown structure of BaTiSi4O11 in the light of the study of its physical properties as potential functional material.

引用

页数：9

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