Lanthanide trifluorides solubility

The direct measurement of enthalpies of solution of lanthanide trifluorides in water is hardly practicable, in view of their very small solubilities in this solvent. Enthalpies of hydration of lanthanide trifluorides have been measured (217). It should be possible to derive enthalpies of solution, at least for the hemihydrates LnF3-y2H20, by measuring enthalpies of precipitation. [Pg.89]

Solubility Products for Lanthanide Trifluorides in Aqueous Solution at 25°C... [Pg.95]

Solubilities of the later lanthanide trifluorides are similar in liquid hydrogen fluoride and in water, though they are slightly more soluble in the former. Solubilities in liquid hydrogen fluoride (probably 98% HF) decrease steadily from a value of 4 x 10-5 mol EuFs per 100 g HF to 2.1 x 10-5 mol LuF3 per 100 g HF, at 0°C (281). [Pg.102]

Other solubilities relevant to this section include those for LaCl3 in aqueous ammonia (173), lanthanide trifluorides in aqueous hydrofluoric acid (133b, 240b, 281,315), and lanthanide trifluorides in aqueous trifluoroacetic acid (316). Trifluoroacetic acid seems to have a marked solubilizing effect on these trifluorides. [Pg.112]

Big Chemical Encyclopedia