Here's what that means:

* Cubic: The unit cell, the smallest repeating unit of the crystal structure, is shaped like a cube.

* Body-centered: An additional atom is located at the center of the cube, in addition to the atoms at each corner.

This structure gives tungsten its characteristic properties:

* High melting point: The strong metallic bonds in the BCC structure require a lot of energy to break, leading to its exceptionally high melting point.

* High density: The compact arrangement of atoms in the BCC structure makes tungsten very dense.

* High hardness: The strong metallic bonds and close packing also contribute to tungsten's high hardness.

Let me know if you'd like more details about crystal structures!