davisite
{{short description|Inosilicate mineral}}
{{Infobox mineral
| name = Davisite
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| formula = CaScAlSiO6
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Davisite is an exceedingly rare mineral of the pyroxene group, with formula CaScAlSiO6. It is the scandium-dominant member.Ma, C., and Rossmann, G.R., 2009: Davisite, CaScAlSiO6, a new pyroxene from the Allende meteoriteMindat, http://www.mindat.org/min-38829.html It stands for scandium-analogue of other pyroxene-group members, esseneite, grossmanite and kushiroite. Davisite is one of scarce minerals containing essential scandium.[http://www.mindat.org/element/Scandium Scandium, The mineralogy of Scandium - Mindat. org]
It is named for Andrew M. Davis, an 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 with space group C2/c.{{cite journal |last1=Ohashi |first1=H. |last2=Ii |first2=N. |journal=Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists |volume=73 |year=1978 |pages=267–273 |title=Structure of calcium scandium aluminum silicate (CaScAlSiO6)-pyroxene|doi=10.2465/ganko1941.73.267 |doi-access=free }}