Germanium dioxide is typically found as a white or colorless powder or as transparent crystals. The melting point of germanium dioxide is around 1,112 degrees Celsius (2,034 degrees Fahrenheit).
features：
Germanium dioxide is generally insoluble in water. However, it can be soluble in concentrated alkali solutions.
Applications:
Germanium dioxide is utilized in the production of optical materials due to its high refractive index and transparency in the infrared region.
