Manganese(II) oxide

Manganese(II) oxide
Names
	IUPAC name Manganese(II) oxide
	Other names Manganous oxide; Manganosite; manganese monoxide; oxomanganese
Identifiers
CAS Number	1344-43-0 ;
3D model (JSmol)	Interactive image;
ECHA InfoCard	100.014.269
PubChem CID	14940;
RTECS number	OP0900000;
UNII	64J2OA7MH3 ;
CompTox Dashboard (EPA)	DTXSID5042110 ;
	SMILES [Mn+2].[O-2];
Properties
Chemical formula	MnO
Molar mass	70.9374 g/mol
Appearance	green crystals or powder
Density	5.43 g/cm3
Melting point	1,945 °C (3,533 °F; 2,218 K)
Solubility in water	insoluble
Solubility	soluble in acid
Magnetic susceptibility (χ)	+4850.0·10−6 cm3/mol
Refractive index (nD)	2.16
Structure
Crystal structure	Halite (cubic), cF8
Space group	Fm3m, No. 225
Coordination geometry	Octahedral (Mn2+); octahedral (O2−)
Thermochemistry
Std molar; entropy (S⦵298)	60 J·mol−1·K−1
Std enthalpy of; formation (ΔfH⦵298)	−385 kJ·mol−1
Hazards
NFPA 704 (fire diamond)	1 0 0
Flash point	Non-flammable
Related compounds
Other anions	Manganese(II) fluoride; Manganese(II) sulfide; Manganese(II) selenide; Manganese(II) telluride
Other cations	Iron(II) oxide
Related manganese oxides	Manganese(II,III) oxide; Manganese(III) oxide; Manganese dioxide; Manganese heptoxide
	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

Manganese(II) oxide is an inorganic compound with chemical formula MnO.^[2] It forms green crystals. The compound is produced on a large scale as a component of fertilizers and food additives.

^ ^a ^b Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A22. ISBN 978-0-618-94690-7.
^ Arno H. Reidies "Manganese Compounds" Ullmann's Encyclopedia of Chemical Technology 2007; Wiley-VCH, Weinheim. doi:10.1002/14356007.a16_123

Names

IUPAC name Manganese(II) oxide
Other names Manganous oxide Manganosite manganese monoxide oxomanganese
Identifiers
CAS Number	1344-43-0^Y
3D model (JSmol)	Interactive image
ECHA InfoCard	100.014.269
PubChem CID	14940
RTECS number	OP0900000
UNII	64J2OA7MH3^Y
CompTox Dashboard (EPA)	DTXSID5042110
SMILES [Mn+2].[O-2]
Properties
Chemical formula	MnO
Molar mass	70.9374 g/mol
Appearance	green crystals or powder
Density	5.43 g/cm³
Melting point	1,945 °C (3,533 °F; 2,218 K)
Solubility in water	insoluble
Solubility	soluble in acid
Magnetic susceptibility (χ)	+4850.0·10⁻⁶ cm³/mol
Refractive index (n_D)	2.16
Structure
Crystal structure	Halite (cubic), cF8
Space group	Fm3m, No. 225
Coordination geometry	Octahedral (Mn²⁺); octahedral (O²⁻)
Thermochemistry
Std molar entropy (S^⦵₂₉₈)	60 J·mol⁻¹·K⁻¹^[1]
Std enthalpy of formation (Δ_fH^⦵₂₉₈)	−385 kJ·mol⁻¹^[1]
Hazards
NFPA 704 (fire diamond)	1 0 0
Flash point	Non-flammable
Related compounds
Other anions	Manganese(II) fluoride Manganese(II) sulfide Manganese(II) selenide Manganese(II) telluride
Other cations	Iron(II) oxide
Related manganese oxides	Manganese(II,III) oxide Manganese(III) oxide Manganese dioxide Manganese heptoxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is ^YN ?) Infobox references