Molar mass

70.9374 g/mol

Appearance

dark green crystals

Density

5.43 g/cm³

Melting point

1945 C

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

Octahedral (Mn²⁺);
Octahedral (O^2-)

Lattice constant

4.43 Å

Std enthalpy of formation  _fH 298

-385 kJ ^. K ^-1[1]

Standard molar entropy S 298

60 J ^. mol^-1 . K^-1[1]