Atomistry » Neodymium » Chemical properties
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Chemical properties of Neodymium

Compounds of Neodymium

The salts of neodymium are rose-red or reddish-violet in colour, and the absorption spectra of their aqueous solutions show characteristic absorption bands. The following equivalent conductivity determinations (λ), effected at 25°, show that the salts are derived from a fairly strong triacid base (v = dilution in litres per gram equivalent): -

NdCl3v=29.2858.56117.12234.24468.48936.96
λ=103.0110.9118.85124.1128.7133.4
Nd2(SO4)3v=33.4766.94133.88267.76535.521071.04
λ=40.6148.1547.12(?)62.2380.2195.95
Nd(C2H3O2)3v=33.8167.62135.24270.48540.961081.92
λ=42.4350.2858.5567.6676.8186.89

Thermochemistry of Neodymium

The following results have been recorded: -

2[Nd] + 3(O) = [Nd2O3] + 435.1 Cals
2[Nd] + 3[S] = [Nd2S3] + 285.9 Cals
[Nd] + 3(Cl) = [NdCl3] + 249.5 Cals
[Nd] + 3[I] = [NdI3] + 157.7 Cals
2[Nd] + 3[S] + 6(O2) = [Nd2(SO4)] + 928.2 Cals
2[Nd] + 3[S] + 6(O2) + 8[H2O] = [Nd2(SO4)3.8H2O] + 946.8 Cals
NdCl3] + Aq. = NdCl3aq + 35.4 Cals
[NdCl3.6H2O] + Aq. = NdCl3aq. + 7.6 Cals
[NdI3] + Aq. = NdI3aq + 48.9 Cals
[Nd2(SO4)3] + Aq. = Nd2(SO4)3aq + 36.5 Cals
[Nd2(SO4)3.5H2O] + Aq. = Nd2(SO4)3aq + 8.3 Cals
[Nd2(SO4)3.8H2O] + Aq. = Nd2(SO4)3aq + 6.7 Cals
[NdCl3] + alcohol = NdCl3 in alc. soln. + 21.5 Cals
[Nd2O3] + 6HClaq. = 2NdCl3aq. + 3H2O + 105.5 Cals
[Nd2O3] + 6HIaq. = 2NdI3aq. + 3H2O + 106.1 Cals
[Nd2O3] + 3[H2SO4] = [Nd2(SO4)3] + 3H2O + 125.1 Cals
[Nd2O3] + 3H2SO4aq. = Nd2(SO4)3aq. + 3H2O + 106.4 Cals

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