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Germanium Dioxide
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Molecular formula
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GeO2
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Molar mass
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104.61 g/mol
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Appearance
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white powder or colourless crystals
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Density
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3.64 g/cm3
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Melting point
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1115°C
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Boiling point
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1200°C
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Solubility in water
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5.2 g/l (25 °C)
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High Quality Germanium Dioxide Specification
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Item No.
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Chemical Component
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GeO2≥%
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Foreign Mat.≤%
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As
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Fe
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Cu
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Ni
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Pb
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Ca
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Mg
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Si
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Co
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In
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Zn
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Al
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Total Content
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UMGD5N
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99.999
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1.0*10-5
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1.0*10-4
|
1.0*10-4
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1.0*10-5
|
1.0*10-5
|
1.0*10-4
|
1.0*10-4
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1.0*10-4
|
1.0*10-5
|
1.0*10-5
|
1.0*10-4
|
1.0*10-4
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1.0*10-3
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|
UMGD6N
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99.9999
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1.0*10-5
|
1.0*10-5
|
1.0*10-6
|
1.0*10-6
|
1.0*10-6
|
1.0*10-5
|
1.0*10-5
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1.0*10-5
|
1.0*10-6
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1.0*10-6
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1.0*10-5
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1.0*10-5
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1.0*10-4
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Packing: neutral carton, Specification: Φ34 ×h38cm, with double-layer plastic bag lining , Net wt. 20Kg.
What is Germanium Dioxide used for?
For the refractive index and optical dispersion properties, Germanium dioxide is useful as an optical material for wide-angle lenses and in optical microscope objective lenses.
Mixture of silicon dioxide and germanium dioxide ("silica-germania") is used as an optical material for optical fibers and optical waveguides.
Germanium dioxide is also used as a catalyst in production of polyethylene terephthalate resin, and for production of other germanium compounds. It is used as a feedstock for production of some phosphors and semiconductor materials.
