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 unique gemstone formed over 1.8 billion years ago A new study conducted by the University of British Columbia reveals that Baffin Island, Nunavut is home to cobalt-blue spinel, which the study ...

MAGNESIUM aluminium oxide sure is a pretty mineral. It forms spinel, a gem coveted throughout history and whose red variant is sometimes confused with ruby. It was used in the Timur Ruby necklace made ...

Spinel compounds have long attracted scientific interest for their rich magnetic behaviour and complex phase transitions. The cubic arrangement of cations into tetrahedral and octahedral sites permits ...