Lithium oxide

Lithium oxide
Names

IUPAC name Lithium oxide
Other names Kickerite
Identifiers
CAS Number	12057-24-8^Y
3D model (Jmol)	Interactive image
ChemSpider	145811^Y
ECHA InfoCard	100.031.823
PubChem	166630
RTECS number	OJ6360000
InChI InChI=1S/2Li.O/q2+1;-2^Y Key: FUJCRWPEOMXPAD-UHFFFAOYSA-N^Y InChI=1S/2Li.O/q2+1;-2 Key: FUJCRWPEOMXPAD-UHFFFAOYAW Key: FUJCRWPEOMXPAD-UHFFFAOYSA-N
SMILES [Li+].[Li+].[O-2]
Properties
Chemical formula	Li 2O
Molar mass	29.88 g/mol
Appearance	white solid
Density	2.013 g/cm³
Melting point	1,438 °C (2,620 °F; 1,711 K)
Boiling point	2,600 °C (4,710 °F; 2,870 K)
Solubility in water	reacts violently to form LiOH
log P	9.23
Refractive index (n_D)	1.644
Structure
Crystal structure	Antifluorite (cubic), cF12
Space group	Fm3m, No. 225
Coordination geometry	Tetrahedral (Li⁺); cubic (O²⁻)
Thermochemistry
Specific heat capacity (C)	1.8105 J/g K or 54.1 J/mol K
Std molar entropy (S^o₂₉₈)	37.89 J/mol K
Std enthalpy of formation (Δ_fH^o₂₉₈)	-20.01 kJ/g or -595.8 kJ/mol
Gibbs free energy (Δ_fG˚)	-562.1 kJ/mol
Hazards
Main hazards	Corrosive, reacts violently with water
Flash point	Non-flammable
Related compounds
Other anions	Lithium sulfide
Other cations	Sodium oxide Potassium oxide Rubidium oxide Caesium oxide
Related lithium oxides	Lithium peroxide Lithium superoxide
Related compounds	Lithium hydroxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y (what is ^YN ?)
Infobox references

Lithium oxide (Li
2 O) or lithia is an inorganic chemical compound. Lithium oxide is formed along with small amounts of lithium peroxide when lithium metal is burned in the air and combines with oxygen:

Pure Li
2O can be produced by the thermal decomposition of lithium peroxide, Li
2O
2, at 450 °C

In the solid state lithium oxide adopts an antifluorite structure which is related to the CaF
2, fluorite structure with Li cations substituted for fluoride anions and oxide anions substituted for calcium cations. The ground state gas phase Li
2O molecule is linear with a bond length consistent with strong ionic bonding.VSEPR theory would predict a bent shape similar to H
2O.

Lithium oxide is used as a flux in ceramic glazes; and creates blues with copper and pinks with cobalt. Lithium oxide reacts with water and steam, forming lithium hydroxide and should be isolated from them.

...
Wikipedia