Germanium dioxide
Germanium dioxide, also called germanium(IV) oxide, germania, and salt of germanium, 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.
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| Names | |||
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| IUPAC name
Germanium dioxide | |||
| 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) |
1.650 | ||
| Structure | |||
| Hexagonal | |||
| Hazards | |||
| NFPA 704 (fire diamond) | |||
| Flash point | Non-flammable | ||
| Lethal dose or concentration (LD, LC): | |||
LD50 (median dose) |
3700 mg/kg (rat, oral) | ||
| Related compounds | |||
Other anions |
Germanium disulfide Germanium diselenide | ||
Other cations |
Carbon dioxide Silicon dioxide Tin dioxide Lead dioxide | ||
Related compounds |
Germanium monoxide | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |||
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