Compression of $Zr2InC$ to $52GPa$ Available to Purchase

Using a synchrotron-radiation source and a diamond-anvil cell, we measured the pressure dependence of the lattice parameters of a polycrystalline $Zr2InC$ sample. Up to a pressure of $52GPa$⁠, no phase transformations were observed. As observed in $Ti3SiC2$ and $Ti3Si0.5Ge0.5C2$⁠, the compressibility of $Zr2InC$ along the $c$ axis was greater than along the $a$ axis. The bulk modulus is $127±5GPa$⁠, with a pressure derivative of $4.25±0.3$⁠; the former is in excellent agreement with our ab initio calculations $(130.9GPa)$⁠. The $a(3.367Å)$ and $c(15.100Å)$ parameters from the ab initio calculations are also slightly larger than those measured here, viz., $3.35$ and $14.91Å$⁠. Surprisingly, a hysteresis was observed in the $a$-lattice parameters; they were higher upon unloading than loading. The reason for this hysteresis is not clear at this time.