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Table 2.

Main properties of atomic models used in statistical equilibrium and NLTE abundance calculations.

Element # Energy levels # Radiative transitions # Frequency points
Fe 548 Fe I 58 Fe II 1 Fe III 12 635 b–b 606 b–f 89 537 b–b 64 455 b–f
Ca 67 Ca I 37 Ca II 1 Ca III 624 b–b 104 b–f 7520 b–b 10 433 b–f
Mg 85 Mg I 1 Mg II X Mg III 246 b–b 85 b–f 2940 b–b 20 242 b–f

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