  We present extensive tables of the atomic partition function (APF) for nickel
ions, Ni I - Ni X. Partition functions are given over wide range of
temperature, 10^3 K < T < 10^6 K, and lowering of ionization energy (0.001 eV <
LIE < 5.0 eV), both taken as independent variables. Our APF take into account
all energy levels predicted by quantum mechanics, including autoionization
levels. The tables can be applied for the computations of model stellar
atmospheres and theoretical spectra over very wide range of spectral classes,
from the coolest K-M dwarfs up to the hottest main sequence, giant, and white
dwarf stars. This include also model spectra of supersoft X-ray sources and
accretion discs in interacting binaries.
