Assertion: carnotite's radium | /r/HasAspect | a density of 5.5 g/cm3
Facets:
Source sentences:
text: Radium has a density of 5.5 g/cm3, higher than that of barium, again confirming periodic trends; the radium-barium density ratio is comparable to the radium-barium atomic mass ratio, due to the two elements' similar crystal structures.