Germanium dioxide

Germanium dioxide
Tetragonal rutile form
Names
	IUPAC name Germanium dioxide
	Other names Germanium(IV) oxide; Germania; ACC10380; G-15; Neutral germanium oxide (1:2); Germanic oxide; Salt of germanium
Identifiers
CAS Number	1310-53-8 ;
3D model (JSmol)	Interactive image;
ChemSpider	14112 ;
ECHA InfoCard	100.013.801
PubChem CID	14796;
RTECS number	LY5240000;
UNII	5O6CM4W76A ;
CompTox Dashboard (EPA)	DTXSID0051653 ;
	InChI InChI=1S/GeO2/c2-1-3 Key: YBMRDBCBODYGJE-UHFFFAOYSA-N ; InChI=1/GeO2/c2-1-3 Key: YBMRDBCBODYGJE-UHFFFAOYAG;
	SMILES O=[Ge]=O;
Properties
Chemical formula	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)
Solubility in water	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.
Magnetic susceptibility (χ)	−34.3·10−6 cm3/mol
Refractive index (nD)	1.650
Structure
Crystal structure	Hexagonal
Hazards
NFPA 704 (fire diamond)	1 0 0
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). verify (what is ?) Infobox references

Germanium dioxide, also called germanium(IV) oxide, germania, and salt of germanium, is an inorganic compound with the chemical formula Ge O₂. It is the main commercial source of germanium. It also forms as a passivation layer on pure germanium in contact with atmospheric oxygen.