cc1 = "#5e81b5"
cc2 = "#e19c24"
cc3 = "#8fb032"
cc4 = "#eb6235"

set terminal epslatex size 8.68cm, 5.5cm standalone
set output "fig-fit.tex"

set tmargin 0.3
set lmargin 7
set rmargin 1.5
set bmargin 3

set nokey
set xrange [-25:300]
set format x '\scriptsize $%g$'
set format y '\scriptsize $%g$'

set arrow 1 from 17.26,graph 0 to 17.26,graph 1 nohead lw 4 lc rgb cc2

set xlabel '\footnotesize $T / \mathrm K$'
set ylabel '\footnotesize $\lambda_{\mathrm B_{1\mathrm g}} / \mathrm{GPa}$' offset 2
set yrange [65.05:65.7]

lam(T) = 71.1212 - 0.0104105 * T

plot "data/c11mc12.dat" using 1:(100 * $2) with lines lw 3 lc rgb cc3, \
      lam(x) / (1 + 6.2662 / (1 + 0.00378087 * abs(x - 17.26)) / lam(x)) dt 3 lw 4 lc rgb cc4