Manganese - Materials / Alfa Chemistry

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Manganese

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Catalog Number

ACMA00014345

Product Name

Manganese

Category

Glass Additives

Description

Manganese appears as a lustrous brittle silvery solid. (NIOSH, 2016);DryPowder; DryPowder, OtherSolid; DryPowder, PelletsLargeCrystals; OtherSolid; OtherSolid, Liquid;GREY-WHITE POWDER.;A lustrous, brittle, silvery solid.;A lustrous, brittle, silvery solid.

IUPAC Name

manganese

Molecular Weight

54.93804g/mol

Molecular Formula

Canonical SMILES

[Mn]

InChI

InChI=1S/Mn

InChI Key

PWHULOQIROXLJO-UHFFFAOYSA-N

Boiling Point

3564 °F at 760 mm Hg (NIOSH, 2016);2061 °C;1962 °C;3564°F;3564°F

Melting Point

2271 °F (NIOSH, 2016);1246 °C;1244 °C;2271°F;2271°F

Density

7.2 (metal) (NIOSH, 2016);7.3 g/cu cm;7.47 g/cm³;7.20 (metal);7.20 (metal)

Solubility

Insoluble (NIOSH, 2016);Readily dissolves in dilute mineral acids;Solubility in water: none;Insoluble

Color/Form

Hard grey metal;Steel grey, lustrous, hard, brittle metal;Alpha is body centered cubic; beta is cubic; delta is body centered cubic.;Gamma or electrolytic manganese is face centered cubic; when stabilized at room temp it is face-centered tetragonal.;Manganese obtained by distillation of crude metal is whitish-gray with silvery crystalline fracture.;Electro-deposited metal is silvery white, hard, and brittle.

Complexity

Covalently-Bonded Unit Count

EC Number

231-105-1

Exact Mass

54.938043g/mol

Formal Charge

Heat of Vaporization

Latent heat of vaporization at boiling point: 4020 J/g

Heavy Atom Count

ICSC Number

0174

MeSH Entry Terms

Manganese

Monoisotopic Mass

54.938043g/mol

Other Experimental

One stable isotope: 55; exists in 4 allotropic forms: alpha form: body-centered cubic, stable below approx. 710 °C, density (at 20 °C): 7.47; beta form: cubic, stable in the range 710-1079 °C, density (at 20 °C): 7.26; gamma form or electrolytic manganese: face-centered cubic, stable in the range 1079-1143 °C, density (at 1100 °C): 6.37; delta form: body-centered cubic, stable in the range 1143 °C to melting point, density (at 1143 °C): 6.28; gamma manganese when stabilized at room temperature is face-centered tetragonal, density (at 20 °C): 7.21; melting point: 1244 °C; boiling point: 2095 °C;Superficially oxidized on exposure to air. Burns with an intense white light when heated in air. Decomposes in water slowly in the cold, rapidly on heating; pure electrolytic manganese is not attacked by steam. Reacts with dilute mineral acids with evolution of hydrogen and formation of divalent manganous salts. Reacts with aqueous solns of sodium or potassium bicarbonate. When heated in nitrogen above 2000 °C burns to form a nitride. Converted by fluorine into the di- and trifluoride, by chlorine into the dichloride. In form of powder reduces most metallic oxides on heating. On heating, reacts directly with carbon, phosphorous, antimony or arsenic.;Density: alpha, 7.47 at 20 °C; beta, 7.26 at 20 °C; gamma, 6.37 at 1100 °C; delta, 6.28 at 1143 °C;When stabilized at room temp, gamma has mp of 1244 °C and bp of 2095 °C;Specific heat 0.115 cal/g/deg C; latent heat of fusion 3.5 kcal/g-atom;COLORS GLASS AN AMETHYST COLOR, & IS RESPONSIBLE FOR COLOR OF TRUE AMETHYST;Alpha is stable below approx 710 °C; beta is stable between 710-1079 °C; gamma is stable between 1079-1143 °C; delta is stable between 1143 °C and its melting point.;GAMMA FORM CHANGES TO ALPHA AT ORDINARY TEMP;Superficially oxidized on exposure to air. Burns with an intense white light when heated in air. Decomposes in water slowly in the cold, rapidly on heating; pure electrolytic manganese is not attacked by steam. Reacts with dilute mineral acids with evolution of hydrogen and formation of divalent manganous salts. Reacts with aqueous solns of sodium or potassium bicarbonate. When heated in nitrogen above 2000 °C burns to form a nitride. Converted by fluorine into the di- and trifluoride, by chlorine into the dichloride. In form of powder reduces most metallic oxides on heating. On heating, reacts directly with carbon, phosphorous, antimony or arsenic.;Vapor pressure: 5.55X10-7 Pa at 800 K; 0.00221 at 1000 K; 0.524 Pa at 1200 K; 24.9 Pa at 1400 °C /Calculated/;Standard enthalpy of fusion: 12.91 kJ/mol;Linear coefficient of expansion (0-100 °C): 22.8X10-6 1/deg C; hardness (Mohs' scale): 5.0; compressibility: 8.4X10-7; solidification shrinkage: 1.7%; magnetic susceptibility: 1.21X10-7 cu m/kg;The alpha and beta forms are brittle; the ductile gamma form is unstable and quickly reverses to the alpha form unless kept at low temperature;There are 4 allotropic forms of which the alpha form is the most important;Molar heat capacity: 26.32 J/mol K at 25 °C, 100 kPa (760 mm Hg);Reduction potential (Acidic or neutral media): +1.5 V (MnO4-/Mn2+); +1.3 V (Mn3+/Mn2+); -1.18 V(Mn2+/Mn)

Rotatable Bond Count

RTECS Number

OO9275000

Stability

Superficially oxidized on exposure to air.

UNII

42Z2K6ZL8P

UN Number

3089

Vapor Pressure

0 mm Hg (approx) (NIOSH, 2016);1 Pa at 955 °C (solid); 10 Pa at 1074 °C (solid); 100 Pa at 1220 °C (solid); 1 kPa at 1418 °C /liquid/; 10 kPa at 1682 °C /liquid/; 100 kPa at 2060 °C /liquid/;0 mmHg (approx);0 mmHg (approx)

MSDS

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COA

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Spec Sheet

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