  The effect of pressure on the structural properties of lanthanum
sesquicarbide La2C3 (T_c = 13 K) has been investigated at room temperature by
angle-dispersive powder x-ray diffraction in a diamond anvil cell. The compound
remains in the cubic Pu2C3-type structure at pressures up to at least 30 GPa.
The corresponding equation of state parameters are reported and discussed in
terms of phase stability of La2C3. Pressure-volume data of the impurity phase
LaC2 are reported also for pressures up to 13 GPa.
