Molybdenum dioxide

Molybdenum dioxide

Names
IUPAC name Molybdenum(IV) oxide
Other names Molybdenum dioxide Tugarinovite
Identifiers
CAS Number	18868-43-4 Y
ECHA InfoCard	100.038.746
PubChem CID	29320
CompTox Dashboard (EPA)	DTXSID10879986 DTXSID5042162, DTXSID10879986
Properties
Chemical formula	MoO2
Molar mass	127.94 g/mol
Appearance	brownish-violet solid
Density	6.47 g/cm3
Melting point	1,100 °C (2,010 °F; 1,370 K) decomposes
Solubility in water	insoluble
Solubility	insoluble in alkalies, HCl, HF slightly soluble in hot H2SO4
Magnetic susceptibility (χ)	+41.0·10−6 cm3/mol
Structure
Crystal structure	Distorted rutile (monoclinic)
Coordination geometry	Octahedral (MoIV); trigonal (O−II)
Hazards
Flash point	Non-flammable
Related compounds
Other anions	Molybdenum disulfide
Other cations	Chromium(IV) oxide Tungsten(IV) oxide
Related molybdenum oxides	"Molybdenum blue" Molybdenum trioxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

Molybdenum dioxide is the chemical compound with the formula MoO₂. It is a violet-colored solid and is a metallic conductor. The mineralogical form of this compound is called tugarinovite, and is only very rarely found.