Draine (2016, in preparation) presents a new estimate for the dielectric tensor of graphite, from submm to X-ray energies. The files below present dielectric functions, and cross sections for spherical and spheroidal grains calculated using these dielectric functions.
Draine (2016, in preparation) has calculated cross sections for graphite spheres at wavelengths from 1cm to 10A (1280 eV). Here we provide files of cross sections for grains of polycrystalline graphite, using an "effective" dielectric function esimated using the Maxwell Garnett effective medium theory, with the "E perp c" component treated as the inclusion (see Draine 2016).
Draine (2016, in preparation) has calculated absorption and scattering cross sections for spheroids, with size a_{eff} [=volume-equivalent radius], using small-spheroid approximations when a_{eff}/lambda is small, and using the spheroid code developed by Voshchinnikov and Farafanov (1993, Astrophys.Sp.Sci. 204, 19) for finite a_{eff}/lambda.
The following files contain cross sections for 168 sizes a_{eff} (0.000316 micron to 5.01um) and 1008 wavelengths (.0912 micron to 1cm) for oblate spheroids with axial, using an effective dielectric function calculated using Maxwell Garnett effective medium theory.
Draine (2016, in preparation) has calculated Planck-averaged cross sections for absorption and radiation pressure for polycrystalline graphite spheres, for sizes from 0.001 micron to 10 micron, and radiation color temperatures from 10K to 5e5 K.