Bismuth Germanate
Structural Formula Vector Image
Title: Bismuth Germanate
CAS Registry Number: 12233-56-6
CAS Name: Bismuth germanium oxide (Bi4Ge3O12)
Additional Names: BGO
Molecular Formula: Bi4Ge3O12
Molecular Weight: 1245.83
Percent Composition: Bi 67.10%, Ge 17.49%, O 15.41%
Line Formula: Bi4(GeO4)3
Literature References: High density scintillation material; g-ray absorber. Single crystal growth and characterization: R. Nitsche, J. Appl. Phys. 36, 2358 (1965); R. V. A. Murthy et al., J. Cryst. Growth 197, 865 (1999); J. B. Shim et al., ibid. 243, 157 (2002). Luminescence properties: M. J. Weber, R. R. Monchamp, J. Appl. Phys. 44, 5495 (1973). Temperature-dependent scintillation properties: H. V. Piltingsrud, J. Nucl. Med. 20, 1279 (1979). Laser-excited optical properties: F. Rogemond et al., J. Luminescence 33, 455 (1985). Optical and photoelastic properties: P. A. Williams et al., Appl. Optics 35, 3562 (1996). Thermophysical properties: V. D. Golyshev et al., J. Cryst. Growth 262, 202, 212 (2004). Performance in PET applications: G. Gervino, E. Monticone, Sensors Actuators A 41-42, 487 (1994); in radiation detectors: Z. S. Macedo et al., Nucl. Instrum. Methods Phys. Res. B 218, 153 (2004).
Properties: Colorless, non-hygroscopc, cubic crystals, mp ~1050°. n550 2.1204. n600 2.1058. n750 2.0786. d 7.13. Emission max: 480 nm.
Melting point: mp ~1050°
Index of refraction: n550 2.1204; n600 2.1058; n750 2.0786
Density: d 7.13
Use: Scintillator crystal in nuclear physics, high-energy physics, geology, and nuclear medical imaging applications including PET, X-ray CT and positron CT; in electromagnetic calorimeters.

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