Figure 10.
Comparison of ρΔHsub/M (energy per volume) to Young’s modulus for various elements and ices. Least squares fits are shown, where NA signifies Not Applicable. Blue diamonds = diamond structure. Red dots = alkali earth metals. Black squares = soft elements and ice compounds: (a) The IVA diamond structure for which bonding varies and the IIA alkali earth metals for which structure varies. (b) Soft V elements, along with ices, fit to one trend (black symbols and line). Also shown are the softest of the IIA metals (red dots where high-Y data are also fit). Publicly available data [16,17] were supplemented with lower bound on arsenic sublimation from [25], and additional data on elements from [44,45,46,47]. Ice data from [21,48,49].