Because of the higher Mg content in clinoenstatite and
Di15En85, the P structure is revealed both by the greater number
of Raman peaks and the change in relative intensities of the peaks
at 381, 417, 445, and 1030 cm–1. The changes in the relative
intensities with respect to C2/c clinoenstatite are observed with
strong intensities only in Di15En85 but not in P21/c pyroxenes with
a higher Ca content, such as Di52En48 and Di40En60.