Seismic anisotropy has been widely observed in the crust and mantle due to the crystal preferred orientation (CPO) of highly anisotropic minerals such as amphibole, though it is poorly constrained ...

The mineral amphibole is made up of tetrahedral and octahedral structures linked together in a way that creates a series of rings. New research suggests those rings -- called A-sites -- could ...

The key to amphibole's ability to dissolve noble gases, the researchers say, is its lattice structure. Amphibole and other silicate minerals are made up of tetrahedral and octahedral structures ...