The actinide elements are actinium (Ac), thorium (Th), protactinium (Pa), uranium (U), neptunium (Np), plutonium (Pu), americium (Am), curium (Cm), berkelium (Bk), californium (Cf), einsteinium (Es), fermium (Fm), mendelevium (Md), nobelium (No), and lawrencium (Lr). These have been reacted with a number of other elements.
The diagram at the top right shows the unit cell of thorium diiodide.
The diagram on the left shows the unit cell of β-ThI3.
The second diagram down on the right shows the unit cell of ThI4.