Bismuth silicon oxide

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Bismuth silicon oxide
Bi12SiO20 crystal.jpg
Bi12SiO20 crystal[1]
Bi12TiO20 structure.png
Bi12SiO20 crystal structure[2]
Molar mass 2855.82
Odor odorless
Density 9.20 g/cm3[2]
Melting point 800 °C[3]
Body-centered cubic, cI66[2]
I23, No. 197
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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]

Another bismuth silicate has formula Bi2O9Si3.[4]


  1. ^ a b 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. ^ a b c Yeh, T. S.; Hu, L. J.; Tu, S. L.; Yang, S. J.; Hsu, S. E.; Hsu, Ken (1993). "Growth and characterization of Bi12(Si1−xTix)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. doi:10.1016/j.jallcom.2013.11.038. 
  4. ^ "bismuth silicate".