Structural Stability of CaCuMn 6 O 12 under High Pressure and Low Temperature

In situ high pressure energy-dispersive x-ray synchrotron radiation diffraction and resistance experiments are carried out on CaCuMn 6 O 12 . Its crystal structure is stable in the measured pressure range. The equation of state of CaCuMn 6 O 12 is obtained from the V / V 0 − P relationship ( V and V 0 are the volumes at pressure P and at atmosphere). The bulk modulus B 0 is calculated based on the Birch–Murnaghan equation. Low temperature x-ray diffraction shows no phase transition occurring down to 160 K.