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Names | |||
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IUPAC name
Germanium dioxide
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Other names
Germanium(IV) oxide
Germania ACC10380 G-15 Neutral germanium oxide (1:2) Germanic oxide Salt of germanium | |||
Identifiers | |||
3D model (JSmol)
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ChemSpider | |||
ECHA InfoCard | 100.013.801 | ||
PubChem CID
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RTECS number |
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UNII | |||
CompTox Dashboard (EPA)
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Properties | |||
GeO2 | |||
Molar mass | 104.6388 g/mol | ||
Appearance | White powder or colourless crystals | ||
Density | 4.228 g/cm3 | ||
Melting point | 1,115 °C (2,039 °F; 1,388 K) | ||
4.47 g/L (25 °C) 10.7 g/L (100 °C) | |||
Solubility | Soluble in HF, insoluble in other acid. Soluble in strong alkaline conditions. | ||
−34.3·10−6 cm3/mol | |||
Refractive index (nD)
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1.650 | ||
Structure | |||
Hexagonal | |||
Hazards | |||
NFPA 704 (fire diamond) | |||
Flash point | Non-flammable | ||
Lethal dose or concentration (LD, LC): | |||
LD50 (median dose)
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3700 mg/kg (rat, oral) | ||
Related compounds | |||
Other anions
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Germanium disulfide Germanium diselenide | ||
Other cations
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Carbon dioxide Silicon dioxide Tin dioxide Lead dioxide | ||
Related compounds
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Germanium monoxide | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Germanium dioxide, also called germanium(IV) oxide, germania, and salt of germanium,[1] is an inorganic compound with the chemical formula GeO2. It is the main commercial source of germanium. It also forms as a passivation layer on pure germanium in contact with atmospheric oxygen.