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Bi₁₂TiO₂₀

Bi12TiO20 crystal
Bi12TiO20 crystal structure
Names
Other names Bismuth titanium oxide, dodecabismuth titanate
Identifiers
CAS Number	12441-73-5
3D model (JSmol)	Interactive image
ChemSpider	27472572
PubChem CID	56846075
InChI InChI=1S/12Bi.20O.TiKey: LIHXTGNDEGWZNF-UHFFFAOYSA-N
SMILES O==O.O=O=O.O=O=O.O=O=O.O=O=O.O=O=O.O=O=O
Properties
Chemical formula	Bi12TiO20
Molar mass	2875.62
Odor	odorless
Density	9.03 g/cm
Melting point	875 °C (1,607 °F; 1,148 K) Decomposes to Bi4Ti3O12 and Bi2O3
Solubility in water	insoluble
Structure
Crystal structure	body-centered cubic, cI66
Space group	I23, No. 197
Related compounds
Other cations	Bismuth silicon oxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references

Bi₄Ti₃O₁₂

Bi4Ti3O12 crystal structure
Names
Other names Bismuth titanium oxide
Identifiers
CAS Number	12010-77-4
3D model (JSmol)	Interactive image
ChemSpider	10637934
EC Number	234-564-6
PubChem CID	138395175
InChI InChI=1S/4Bi.12O.3Ti/q4*+3;12*-2;3*+4Key: LEVGIWAPKXUVTE-UHFFFAOYSA-N
SMILES ..................
Properties
Chemical formula	Bi4Ti3O12
Molar mass	1171.5
Odor	odorless
Density	7.95 g/cm
Solubility in water	insoluble
Band gap	3.5 eV
Structure
Crystal structure	Orthorhombic, oS76
Space group	Aba2, No. 41
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references

Bismuth titanate or bismuth titanium oxide is a solid inorganic compound of bismuth, titanium and oxygen with the chemical formula of Bi₁₂TiO₂₀, Bi ₄Ti₃O₁₂ or Bi₂Ti₂O₇.

Synthesis

Bismuth titanate ceramics can be produced by heating a mixture of bismuth and titanium oxides. Bi₁₂TiO₂₀ forms at 730–850 °C, and melts when the temperature is raised above 875 °C, decomposing in the melt to Bi₄Ti₃O₁₂ and Bi₂O₃. Millimeter-sized single crystals of Bi₁₂TiO₂₀ can be grown by the Czochralski process, from the molten phase at 880–900 °C.

Properties and applications

Bismuth titanates exhibit electrooptical effect and photorefractive effect, that is, a reversible change in the refractive index under applied electric field or illumination, respectively. Consequently, they have potential applications in reversible recording media for real-time holography or image processing applications.

See also

• Bismuth germanate
• Sillénite

References

1. ^ Shen, Chuanying; Zhang, Huaijin; Zhang, Yuanyuan; Xu, Honghao; Yu, Haohai; Wang, Jiyang; Zhang, Shujun (2014). "Orientation and Temperature Dependence of Piezoelectric Properties for Sillenite-Type Bi₁₂TiO₂₀ and Bi₁₂SiO₂₀ Single Crystals". Crystals. 4 (2): 141. doi:10.3390/cryst4020141.
2. ^ Efendiev, Sh. M.; Kulieva, T. Z.; Lomonov, V. A.; Chiragov, M. I.; Grandolfo, M.; Vecchia, P. (1982). "Crystal Structure of Bismuth Titanium Oxide Bi₁₂TiO₂₀". Physica Status Solidi A. 74 (1): K17 – K21. Bibcode:1982PSSAR..74...17E. doi:10.1002/pssa.2210740148.
3. Yaws, Carl L. (2015). The Yaws Handbook of Physical Properties for Hydrocarbons and Chemicals: Physical Properties for More Than 54,000 Organic and Inorganic Chemical Compounds, Coverage for C1 to C100 Organics and Ac to Zr Inorganics. Elsevier Science. p. 698. ISBN 978-0-12-801146-1.
4. ^ Santos, D. J.; Barbosa, L. B.; Silva, R. S.; MacEdo, Z. S. (2013). "Fabrication and Electrical Characterization of Translucent Bi₁₂TiO₂₀ Ceramics". Advances in Condensed Matter Physics. 2013: 1–7. doi:10.1155/2013/536754.
5. ^ Van Uitert, L. G.; Egerton, L. (1961). "Bismuth Titanate. A Ferroelectric". Journal of Applied Physics. 32 (5): 959. Bibcode:1961JAP....32..959V. doi:10.1063/1.1736142.

• Titanates
• Bismuth compounds
• Ceramic materials
• Piezoelectric materials
• Ferroelectric materials