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D. J. Bord (UMich-Dearborn), C. R. Cowley (UMich-Ann Arbor)
We have calculated abundances from weak lines of Tb II, Ho II, and In I, using center-of-the-disk solar spectra. Preliminary results for Tb were reported by Lawler et al. (ApJ, in press). Here we discuss details of the placement of the continuum in the vicinity of the Balmer confluence and its effect on the derived Tb abundance. Both the Tb and Ho determinations required updates of the partition functions. In the case of Ho, new theoretical levels added nearly 50% to the partition function calculable from known energy levels alone. For the refractory lanthanide elements, we find that accurate oscillator strengths and partition functions lead to abundances in good agreement with the CI meteorites. We also confirm an older result that the meteoritic abundance for the volatile element In may be depleted by up to a factor of eight relative to the Sun.