Table 2: Ionic species of iron at 20 MK.
Element Z-z $Z_{\rm eff}$ $\Phi_{Z_{\rm eff}}$ A_z $A_zZ_{\rm eff}^4$ $V_z = Z_{\rm eff}^2\chi$ (keV)

Fe XXII 21 21.98 0.05 0.43 $\times$ 10^-5 1.004 6.57

Fe XXIII 22 22.61 0.14 1.21 $\times$ 10^-5 3.152 6.95

Fe XXIV 23 23.20 0.25 2.15 $\times$ 10^-5 6.232 7.32

Fe XXV 24 23.77 0.56 4.82 $\times$ 10^-5 15.381 7.68

**Table 2:** Ionic species of iron at 20 MK.
Element	Z-z	$Z_{\rm eff}$	$\Phi_{Z_{\rm eff}}$	A_z	$A_zZ_{\rm eff}^4$	$V_z = Z_{\rm eff}^2\chi$ (keV)
Fe XXII	21	21.98	0.05	0.43 $\times$ 10^-5	1.004	6.57
Fe XXIII	22	22.61	0.14	1.21 $\times$ 10^-5	3.152	6.95
Fe XXIV	23	23.20	0.25	2.15 $\times$ 10^-5	6.232	7.32
Fe XXV	24	23.77	0.56	4.82 $\times$ 10^-5	15.381	7.68

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