Lanthanum oxide is an odorless, white solid that is insoluble in water, but soluble in dilute acid.
Depending on the pH of the compound, different crystal structures can be obtained.
La₂O₃ is hygroscopic; under atmosphere, it absorbs moisture over time and converts to lanthanum hydroxide.
Lanthanum oxide has p-type semiconducting properties and a band gap of approximately 5.8 eV.. Its average room temperature resistivity is 10 kΩ·cm, which decreases with an increase in temperature.
La₂O₃  has the lowest lattice energy of the rare earth oxides, with very high dielectric constant, ε = 27.
Lanthanum oxide is an odorless, white solid that is insoluble in water, but soluble in dilute acid. Depending on the pH of the compound, different crystal structures can be obtained. La₂O₃ is hygroscopic; under atmosphere, it absorbs moisture over time and converts to lanthanum hydroxide. Lanthanum oxide has p-type semiconducting properties and a band gap of approximately 5.8 eV.. Its average room temperature resistivity is 10 kΩ·cm, which decreases with an increase in temperature. La₂O₃  has the lowest lattice energy of the rare earth oxides, with very high dielectric constant, ε = 27.
Lanthanum oxide