Amphibole Lattice (image) Brown University Caption 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 dissolve noble gases, which are not generally thought to dissolve in minerals. The findings could explain how noble gases are cycled from deep within the Earth to the surface and back again. Credit Parman Lab / Brown University Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.