(above) germanium #1 atoms arranged in a diamond-like atomic array
germanium: graphic showing the metalloid with atoms arranged in a diamond-like atomic array. Diamond crystal structure is a face centred cube with four additional atoms inside the cube. It is formed when an atom bonds to four neighbours which are positioned at the points of a regular tetrahedron. It is not a close packed arrangement. Germanium is used in semiconductors.
Image is 500 pixels across, the originals are 4096 pixels across.