Agrellite
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Agrellite (Template:Chem2) is a rare triclinic inosilicate mineral with four-periodic single chains of silica tetrahedra.
It is a white to grey translucent mineral, with a pearly luster and white streak. It has a Mohs hardness of 5.5 and a specific gravity of 2.8. Its type locality is the Kipawa Alkaline Complex, Quebec, Canada, where it occurs as tabular laths in pegmatite lenses.[1] Other localities include Murmansk Oblast, Russia, Dara-i-Pioz Glacier, Tajikistan, and Saima Complex, Liaoning, China.[1] Common associates at the type locality include zircon, eudialyte, vlasovite, miserite, mosandrite-(Ce), and calcite.[1]
Agrellite displays pink fluorescence strongly under shortwave and weakly under longwave ultraviolet light.[2][3] The fluorescent activator is dominantly Mn2+, with minor Eu2+, Sm3+, and Dy3+.[3]
It is named in honor of Stuart Olof Agrell (1913–1996), a British mineralogist at Cambridge University.
See also
References
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