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Properties of substance:

Physical appearance:

green triclinic crystals

Empirical formula (Hill's system):

H12N2NiO12

Structural formula:

Ni(NO3)2 · 6H2O

Molar/atomic mass: 290.81

Melting point (°C):

56.7

Boiling point (°C):

136.7

Solubility (g/100 g of solvent):

water: 94.2 (20°C) [Ref.]
water: 118.4 (40°C) [Ref.]
water: 157.7 (60°C) [Ref.]
water: 225 (100°C) [Ref.]
dimethylformamide: 20 (25°C) [Ref.]
ethanol: soluble [Ref.]

Gigroscopic:

yes

    Standard molar enthalpy (heat) of formation ΔfH0 (298.15 K, kJ/mol):

    -2215 (s)

    Standard molar entropy S0 (298.15 K, J/mol·K):

    511 (s)

    Molar heat capacity at constant pressure Cp (298.15 K, J/mol·K):

    462 (s)

    Molar enthalpy (heat) of fusion ΔfusH (kJ/mol):

    41.4

    References:

    1. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 172-173
    2. Справочник химика. - Т.2. - Л.-М.: Химия, 1964. - pp. 152-153
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      © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru