Neodymium sulphate, Nd₂(SO₄)₃

Neodymium sulphate, Nd₂(SO₄)₃. - The only hydrate known is the monoclinic octahydrate, Nd₂(SO₄)₃.8H₂O, the solubility of which, in grams of anhydrous sulphate per 100 grams of water, is as follows: -

Temp. °C	0°	16°	30°	50°	80°	100°
Grams of Nd2(SO4)3	9.5	7.1	5.1	3.6	2.7	2.25

Neodymium caesium sulphate, Nd₂(SO₄)₃.Cs₂SO₄.3H₂O, forms lavender-blue crystals.