Crystal structures of (a) and (b) corundum-. Different types of In atoms are marked by different colors.
Angle dispersive XRD patterns of at selected pressures at room temperature. The peak labeled L as inset is zoomed to show the doublet features in the spectrum. Arrow indicates the new diffraction peaks at 15.3 GPa and 23.4 GPa, respectively. The tick marks indicate the positions of calculated Bragg reflections of (dashed) and corundum- (real line), which are indexed on the top pattern.
Pressure-Volume data of at 300 K. The solid hexagon represents the cubic phase. The line represents the fit to the Birch–Murnaghan equation.
Pressure dependencies of (left curve) and (right curve) for .
Raman spectra of at ambient conditions and at high pressures. For clarity the spectra have been divided into two parts: (a) and (b) . The six Raman modes are labeled , , , , , and , respectively.
Pressure dependence of Raman frequency shifts in at room temperature. Vertical dotted lines indicate phase transition pressures.
Unit cell parameters and volume of at various pressures. Derived pseudocubic values are given for the cubic phase along with the primitive hexagonal lattice constants that were directly determined from the diffraction data. At 15.3 GPa lattice constants for both the hexagonal and cubic phases are given as both were present in significant amounts.
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