Hexagonal close packing is one of two crystal structures that derive from stacking close-packed-planes of hard sphere atoms. In the HCP structure only two stacking ...

Titanium is a metal in group IVB of the periodic table with atomic number 22, an atomic weight of 47.90, a density of 4.54 Mg/m 3, and a melting point of 1670 C. The electronic configuration of ...

It looks like it’s straight out of a comic book, but BiVACOR is a real, functioning titanium heart. The metal device is ultimately intended as a replacement for human donor organs, but was first ...