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Manganese(II)oxide

CAS number : 1344-43-0

Molecular weight :70.94

Molecular formula/chemical symbol :MnO

Description :

Manganese(II) oxide is the inorganic compound with formula MnO. MnO is a basic oxide that is insoluble in water but dissolves in acids, forming manganese(II) salts.

MnO has the NaCl, rock salt structure, where cations and anions are both octahedrally coordinated. The composition of MnO can vary from MnO to MnO_1.045.

Below 118 K MnO is antiferromagnetic. MnO has the distinction of being one of the first compoundsto have its magnetic structure determined by neutron diffraction in 1951. This study showed that the Mn²⁺ ions form a face centered cubic magnetic sub-lattice where there are ferromagnetically coupled sheets which are anti-parallel with adjacent sheets.

Manganese(II) oxide

IUPAC name[hide] Manganese(II) oxide
Other names[hide] Manganous oxide Manganosite manganese monoxide
Identifiers
CAS number	1344-43-0 ^Y
PubChem	14940
RTECS number	OP0900000
Properties
Molecular formula	MnO
Molar mass	70.9374 g/mol
Appearance	green crystals or powder
Density	5.43 g/cm³
Melting point	1945 °C, 2218 K, 3533 °F
Solubility in water	insoluble
Solubility	soluble in acid
Refractive index (n_D)	2.16
Structure
Crystal structure	Halite (cubic), cF8
Space group	Fm3m, No. 225
Coordination geometry	Octahedral (Mn²⁺); octahedral (O^2–)
Thermochemistry
Std enthalpy of formation Δ_fH^o₂₉₈	?385 kJ·mol^?1[1]
Standard molar entropy S^o₂₉₈	60 J·mol^?1·K^?1[1]
Hazards
EU Index	Not listed
Flash point	Non-flammable
Related compounds
Other anions	Manganese difluoride Manganese(II) sulfide
Other cations	Iron(II) oxide
Related manganese oxides	Manganese(II,III) oxide Manganese(III) oxide Manganese dioxide Manganese heptoxide
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

USES :

Together with manganese sulfate, MnO is a component of fertilizer and feed additives. Many thousands of tons are consumed annually for this purpose.

Other uses include: a catalyst in the manufacture of allyl alcohol, ceramics, paints, colored glass, bleaching tallow and textile printing.

Keywords:Electronic chemicals;Fine ceramics

Report :

Product name	Manganese(II)oxide			CAS：1344-43-0
Description	Grass green or gray-green cubic crystal powder or octahedral crystals
TEST ITEMS		TEST RESULTS
MnO		60％	62％		70％	77％	82％	89％
Mn		46％	48％		54％	60％	62％	69％
H2O		0.5％	0.5％		0.5％	0.5％	0.5％	0.5％
Pb		0.002％	0.002％		0.002％	0.002％	0.002％	0.002％
Cd		0.002％	0.002％		0.002％	0.002％	0.002％	0.002％
As		0.002％	0.002％		0.002％	0.002％	0.002％	0.002％