Bismuth silicon oxide

Bismuth silicon oxide
	; Bi12SiO20 crystal[1]
	; Bi12SiO20 crystal structure[2]
Names
	Other names sillénite
Identifiers
CAS Number	12377-72-9 ;
3D model (JSmol)	Interactive image;
ChemSpider	23354126 ;
ECHA InfoCard	100.032.369
EC Number	235-620-2;
PubChem CID	73555496;
CompTox Dashboard (EPA)	DTXSID201014301;
	InChI InChI=1S/12Bi.O4Si.16O/c;;;;;;;;;;;;1-5(2,3)4;;;;;;;;;;;;;;;;/q12+3;-4;16-2 Key: JLXRQKOSFUIFEC-UHFFFAOYSA-N;
	SMILES [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-][Si]([O-])([O-])[O-].[Bi+3].[Bi+3].[Bi+3].[Bi+3].[Bi+3].[Bi+3].[Bi+3].[Bi+3].[Bi+3].[Bi+3].[Bi+3].[Bi+3];
Properties
Chemical formula	Bi12SiO20
Molar mass	2855.82
Odor	odorless
Density	9.20 g/cm3[2]
Melting point	800 °C[3]
Solubility in water	insoluble
Structure
Crystal structure	Body-centered cubic, cI66[2]
Space group	I23, No. 197
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
	verify (what is ?)
	Infobox references

Bismuth silicon oxide is a solid inorganic compound of bismuth, silicon and oxygen. Its most common chemical formula is Bi₁₂SiO₂₀, though other compositions are also known. It occurs naturally as the mineral sillénite and can be produced synthetically, by heating a mixture of bismuth and silicon oxides. Centimeter-sized single crystals of Bi₁₂SiO₂₀ can be grown by the Czochralski process from the molten phase. They exhibit piezoelectric, electro-optic, elasto-optic and photoconductive properties, and therefore have potential applications in spatial light modulators, acoustic delay lines and hologram recording equipment.[1] Bi₁₂SiO₂₀ can be obtained as a whitish powder with band gap of approximately 3.2 eV starting from bismuth subcarbonate and silica in presence of ethyleneglycol.[4] ²⁹Si solid-state NMR is used to proof that the Si(IV) cations are sharing oxygen atoms with the Bi(III) cations. The ²⁹Si chemical shift (δ) in Bi₁₂SiO₂₀ is −78.1 ppm. Unlike the bismuth oxide, the presence of the acidic Si(IV) cations avoid the reactivity with CO₂.

Another bismuth silicate has formula Bi₂O₉Si₃.[5]

References

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.
Yeh, T. S.; Hu, L. J.; Tu, S. L.; Yang, S. J.; Hsu, S. E.; Hsu, Ken (1993). "Growth and characterization of Bi₁₂(Si_1−xTi_x)O₂₀ mixed crystals". Journal of Applied Physics. 73 (11): 7872. doi:10.1063/1.353938.
Riscob, B.; Shkir, Mohd.; Ganesh, V.; Vijayan, N.; Maurya, K.K.; Kishan Rao, K.; Bhagavannarayana, G. (2014). "Synthesis, crystal growth and mechanical properties of Bismuth Silicon Oxide (BSO) single crystal". Journal of Alloys and Compounds. 588: 242–247. doi:10.1016/j.jallcom.2013.11.038.
Ortiz-Quiñonez JL, Zumeta-Dubé I, Díaz D, Nava-Etzana N, Cruz-Zaragoza E (2017). "Bismuth Oxide Nanoparticles Partially Substituted with Eu^III, Mn^IV, and Si^IV: Structural, Spectroscopic, and Optical Findings". Inorg. Chem. 56 (6): 3394–3403. doi:10.1021/acs.inorgchem.6b02923. PMID 28252972.
"bismuth silicate". pubchem.ncbi.nlm.nih.gov.

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[r2-1] 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.

[str2-2] Yeh, T. S.; Hu, L. J.; Tu, S. L.; Yang, S. J.; Hsu, S. E.; Hsu, Ken (1993). "Growth and characterization of Bi₁₂(Si_1−xTi_x)O₂₀ mixed crystals". Journal of Applied Physics. 73 (11): 7872. doi:10.1063/1.353938.

[3] Riscob, B.; Shkir, Mohd.; Ganesh, V.; Vijayan, N.; Maurya, K.K.; Kishan Rao, K.; Bhagavannarayana, G. (2014). "Synthesis, crystal growth and mechanical properties of Bismuth Silicon Oxide (BSO) single crystal". Journal of Alloys and Compounds. 588: 242–247. doi:10.1016/j.jallcom.2013.11.038.

[4] Ortiz-Quiñonez JL, Zumeta-Dubé I, Díaz D, Nava-Etzana N, Cruz-Zaragoza E (2017). "Bismuth Oxide Nanoparticles Partially Substituted with Eu^III, Mn^IV, and Si^IV: Structural, Spectroscopic, and Optical Findings". Inorg. Chem. 56 (6): 3394–3403. doi:10.1021/acs.inorgchem.6b02923. PMID 28252972.

[5] "bismuth silicate". pubchem.ncbi.nlm.nih.gov.