Fig. 5 | Nature Communications

Fig. 5

From: Reactivity of He with ionic compounds under high pressure

Fig. 5

Relative changes in PV work, internal energy E, and Madelung energy EM for He insertion. a–e The corresponding data of helium inclusion into a MgF2, b MgO, c LiF, d Li2O, e CaF2, and f Na. Relative changes in PV work, internal energy E, and numerically determined Madelung energies EM changes per formula unit are shown with red star, blue hexagonal, and square purple solid lines, respectively

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