Metals and Minerals

Germanium Dioxide (GeO₂)

Germanium oxide is formed rapidly when Germanium is raised to red heat. It is produced worldwide.
GeO2 is usually slightly soluble in water and is sometimes only soluble in a strong acid.
Chemical Formula:
i) Germanium monoxide= GeO
ii) Germanium dioxide= GeO2

Appearance Colorless crystals or white powder
Odor None
Odor Threshold Not Applicable
pH Not Applicable
Vapour Pressure .<9.25 Pa @ 25°C
Vapour Density Not Applicable
Melting Point/Range 1115°C
Boiling Point/Range No Data
Relative Density 4.23 (Water = 1)
Bulk Density 1614 Kg/m3
Evaporation Rate Not Applicable
Coefficient of Water/Oil Distribution log Pow = 2.21
Solubility 4.14 g/L @ 20 ºC, 4.5 g/L @ 25ºC, 10.7 g/L @ 100ºC
Flash Point None
Flammable Limits (LEL/UEL) Not Flammable
Auto-ignition Temperature None
Decomposition Temperature None

Used in the production of phosphors, transistors and diodes, infrared-transmitting glass.
Used as a catalyst in the manufacture of PET resin.
Fibre optics
Chemotherapy

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