Group mean emissivities and opacities of high temperature SiO2

Absorption and extinction coefficients of SiO2 have been calculated using a mean ion model but with the most important singly and multiply excited states of the dominant ionic species considered explicitly. Free-free, bound-free, bound-bound, and scattering are taken into account. Densities range from 10 to the -6th to 10 to the 3rd g/cu cm and temperatures range from 30 to 10 keV. Emissivities are obtained from detailed balance. Group means are given for some representative cases.