Comparison of field-ionization-free resonant plasma recombination rate coefficients with theoretical calculated results for Be-like Ar. Full squares show rate coefficients by Colgan et al. (2003). Calculations by Gu (2003) and Mazzotta et al. (1998) are shown by full triangles and full circles, respectively. Rate coefficients of Romanik (1988) and Shull & Van Steenberg (1982) are shown by full diamonds and stars, respectively. Temperature ranges where the Be-like Ar concentration is higher than 10% of its maximum abundance in photoionized and collisionally ionized plasmas are shown by vertical dashed bars, as in Figure 3 (Kallman & Bautista 2001; Bryans et al. 2009).