Co K-edge HERFD-XAS, Kβ1,3 XES, and Kβv2c XES measurements were performed at SRL on the undulator beamline 15-2 under standard ring conditions. The beam was focused using a bent single-crystal KB mirror, and energy selection was achieved using a liquid N2cooled Si(111) double-crystal monochromator. To minimize self-absorption effects, the compounds were measured as dilute bulk powders, prepared by grinding the sample with dry boron nitride (~1:100 mass ratio of sample to boron nitride) to a uniform, fine powder. ~30 mg of powder was used to prepare cylindrical pellets as described above. During the measurement, samples were held in an Oxford liquid He cryostat at a temperature of ~10 K. A custom He-filled bag was used as a beam flightpath to minimize absorption and scattering of the incident beam values for the peak heights and energies to ensure that the optimized parameters represented a global minimum. Co Kβ1,3 and Kβv2c emission spectra were analyzed in Matlab. Linear background functions were subtracted from the Kβ mainline spectra and a cubic spline was used to model the background of the valence-to-core spectra. The intensities of the Kβ mainline spectra were scaled to an integrated intensity of 1. The first moment of the Kβ1,3 feature was determined by integrating across 50% of the maximum peak intensity of the Kβ mainline spectrum. The lowenergy region of the v2c spectra were scaled to overlay with the high-energy region of the normalized Kβ mainline spectra in the energy range 7654.5-7663.5 eV to normalized the v2c region. The normalized v2c spectra were deconvoluted using Gaussian components in Matalb using the lsqcurvefit function to minimize the sum of squared residuals between the measured and modeled spectra. The Gaussian components had variable heights and energies; the widths were also allowed to vary but were fixed to be the same value for all components. Fitting was performed with several initial guess values for the peak heights and energies to ensure that the optimized parameters represented a global minimum.