Lanthanum cuprate usually refers to the inorganic compound with the formula CuLa2O4.

The name implies that the compound consists of a cuprate (CuOn]2n-) salt of lanthanum (La3+).

[1] The material adopts a tetragonal structure related to potassium tetrafluoronickelate (K2NiF4), which is orthorhombic.

That doped material displays superconductivity at −243 °C (30.1 K), which at the time of its discovery was a high temperature.

This discovery initiated research on cuprate superconductors and was the basis of a Nobel Prize in Physics to Georg Bednorz and K. Alex Müller.