Ion

Condition for the LTE applicability

Condition for the CM applicability

Mg IX

ne > 6 × 10²¹

ne < 4.7 × 10¹⁷

Mg X

ne > 1 × 10²²

ne < 9 × 10¹⁷

Mg XI

ne > 2 × 10²²

ne < 1.6 × 10¹⁸