Spinel, MgAl 2 O 4 (download cif), is a rare gemstone that was used to imitate rubies. The structure has face-centered cubic symmetry, and is a little heavy to understand. The general formula is AB 2 ...

The gemstone spinel, known for its vibrant colors resembling ... and transmit information in ways that classical systems cannot. At the heart of this technology are collections of qubits, known ...