Technically I'm supposed to have a total of 8 optical modes but only 4 of them were seen in a solid (by spectroscopy). So I suspect there's some degeneracies and symmetries involved, but I don't know which ones. I have two sets of assigned degeneracies: frequency; degeneracy set 1; degeneracy set 2 f#1 ; 2 ; 5 f#2 ; 2 ; 1 f#3 ; 2 ; 1 f#4 ; 2 ; 1 This is what I'm attempting below: I'm doing some quick calculations assuming Einstein's model of a solid for heat capacity at several temperatures. What I want is to find the individual contributions of each optical mode to the heat capacity. For each frequency per degeneracy set, I'm taking: (calculated heat capacity)*(4 observed modes)*(corresponding degeneracy assignment for given frequency) / (8 total optical modes). For example, for f#1: (heat capacity)*(4*2/8) + (heat capacity)*(4*5/8). Is that the correct way to incorporate/weigh/factor/scale degeneracy into heat capacity per optic mode?