"MoO2" redirects here. For the videogame, see Master of Orion II: Battle at Antares.
Molybdenum dioxide
Names
IUPAC name
Molybdenum(IV) oxide
Other names
Molybdenum dioxide Tugarinovite
Identifiers
CAS Number
18868-43-4Y
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).
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Infobox references
Chemical compound
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. The discovery and early studies of molybdenum dioxide date back to the late 18th and early 19th centuries. One of the notable figures in the history of molybdenum dioxide is the Hungarian chemist Jakob Joseph Winterl (1732–1809). Winterl, who was a professor of chemistry and botany at the University of Budapest, made significant contributions to the understanding of molybdenum compounds. In 1787, he proposed that copper was a compound of nickel, molybdenum, silica, and a volatile substance, showcasing his interest in molybdenum chemistry.[1]
^Snelders, H. A. M. (July 1970). "The Influence of the Dualistic System of Jakob Joseph Winterl (1732–1809) on the German Romantic Era". Isis. 61 (2): 231–240. doi:10.1086/350622. ISSN 0021-1753.
and 28 Related for: Molybdenum dioxide information
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