Fig. 8: Temperature dependence of the wavenumber of selected modes for A85 and A86.

a Trends for the ring mode; b trends for the chain mode. Data points derived from the \({{\bar{y}}^{{\prime} }}({zz})y^{\prime}\) spectra measured in situ in N2 atmosphere are given with circles; data points derived from \(\bar{y^{\prime} }(x^{\prime} x^{\prime} )y\)’ spectra measured in situ in air are given with squares. Blue symbols refer to A85, red symbols to A86.