Davisite is an exceedingly rare mineral of the pyroxene group, with formula CaScAlSiO₆. It is the

scandium Scandium is a chemical element with the symbol Sc and atomic number 21. It is a silvery-white metallic d-block element. Historically, it has been classified as a rare-earth element, together with yttrium and the Lanthanides. It was discovere ...

-dominant member.Mindat, http://www.mindat.org/min-38829.html It stands for

-analogue of other pyroxene-group members,

esseneite Esseneite is a relative rare mineral of the pyroxene group, with formula CaFeAlSiO6. It is the ferric-iron-dominant member. Esseneite is an iron-analogue of other pyroxene-group members, davisite, grossmanite, and kushiroite. It is a metamorphic ...

grossmanite Grossmanite is a very rare mineral of the pyroxene group,Mindat, Grossmanite, http://www.mindat.org/min-39426.html with formula CaTi3+AlSiO6. It is the titanium-dominant member. Grossmanite is unique in being a mineral with trivalent titanium, a fea ...

and kushiroite. Davisite is one of scarce minerals containing essential scandium. Named after Andrew M. Davis, American meteoriticist and professor of astronomy and geoscience at the University of Chicago. Based on a synthesized sample, the mineral likely crystallizes in the

monoclinic crystal system In crystallography, the monoclinic crystal system is one of the seven crystal systems. A crystal system is described by three vectors. In the monoclinic system, the crystal is described by vectors of unequal lengths, as in the orthorhombic sys ...

with space group ''C2/c''.

References

Pyroxene group Inosilicates Calcium minerals Scandium minerals Aluminium minerals Monoclinic minerals Minerals in space group 15 {{silicate-mineral-stub