Structural properties of the sesquicarbide superconductor La2C3 at high   pressure
  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. 
X. Wang, I. Loa, K. Syassen, R. K. Kremer, A. Simon, M. Hanfland, K.   Ahn