Davisite
An exceedingly rare scandium-dominant pyroxene — the Sc analogue of esseneite, grossmanite and kushiroite.
Intro adapted from Wikipedia (CC BY-SA).
Davisite is an IMA-recognized mineral species in the silicate class, with the chemical formula CaScAlSiO₆.
It crystallizes in the monoclinic crystal system (space group C2/c). It is a member of the Pyroxene structural group.
Key properties: specific gravity 3.38.
IMA symbol Dav, IMA status: approved, named in 2008.
Likely formed through high-temperature condensation in the solar nebula, followed by melting and crystallization in Ca-, Al-rich refractory inclusions in a meteorite.
It is found associated with Spinel, perovskite.
The mineral was named to honor Andrew M. Davis (b. 1950), Professor of Cosmochemistry at the University of Chicago, USA for his contributions to meteorite research.