Structural Stability of CaCuMn₆O₁₂ under High Pressure and Low Temperature

In situ high pressure energy-dispersive x-ray synchrotron radiation diffraction and resistance experiments are carried out on CaCuMn₆O₁₂. Its crystal structure is stable in the measured pressure range. The equation of state of CaCuMn₆O₁₂ is obtained from the V/V₀-P relationship (V and V₀ are the volumes at pressure P and at atmosphere). The bulk modulus B₀ is calculated based on the Birch--Murnaghan equation. Low temperature x-ray diffraction shows no phase transition occurring down to 160K.