Gadolinium oxyorthosilicate

Gadolinium oxyorthosilicate (known as GSO) is a type of scintillating inorganic crystal used for imaging in nuclear medicine and for calorimetry in particle physics.

Gadolinium oxyorthosilicate
Names
IUPAC name
dioxido(oxo)silane;gadolinium(3+);oxygen(2-)
Other names
  • Gadolinium(III) oxyorthosilicate
Identifiers
3D model (JSmol)
ChemSpider
EC Number
  • 235-386-1
  • InChI=1S/2Gd.O3Si.2O/c;;1-4(2)3;;/q2*+3;3*-2
    Key: XEVCWPDRHSBFQW-UHFFFAOYSA-N
  • [O-2].[O-2].[O-][Si](=O)[O-].[Gd+3].[Gd+3]
Properties
Gd2O5Si
Molar mass 422.58 g·mol−1
Density 6.7 g/cm3
Melting point 1,900 °C (3,450 °F; 2,170 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

The formula is Gd2SiO5. Its main properties are shown below:

Density (g/cm3)6.7
Melting Point (°C)1900
Radiation Length (cm)1.38
Decay Constant (ns)50-60
Light Yield (relative BGO=100%)110
Index of Refraction1.87
Peak Excitation (nm)350
Radiation Hardness (rad)>106
HygroscopicNo
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