Kangite is an exceedingly rare

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 discovered in ...

mineral, a natural form of impure

scandium oxide Scandium(III) oxide or scandia is a inorganic compound with formula Sc2 O3. It is one of several oxides of rare earth elements with a high melting point. It is used in the preparation of other scandium compounds as well as in high-temperature sys ...

), with the formula . It crystallizes in the

cubic crystal system In crystallography, the cubic (or isometric) crystal system is a crystal system where the Crystal_structure#Unit_cell, unit cell is in the shape of a cube. This is one of the most common and simplest shapes found in crystals and minerals. There ...

diploidal class. In terms of chemistry it scandium-analogue of

tistarite Tistarite is an exceedingly rare mineral with the formula Ti2O3, thus being the natural analogue of titanium(III) oxide.Mindat, Tistarite, http://www.mindat.org/min-38695.html In terms of chemistry it is the titanium-analogue of hematite, corundum ...

. Both kangite and tistarite were discovered in the

Allende meteorite The Allende meteorite is the largest carbonaceous chondrite ever found on Earth. The fireball was witnessed at 01:05 on February 8, 1969, falling over the Mexican state of Chihuahua. After it broke up in the atmosphere, an extensive search for ...

.Mindat, Kangite, http://www.mindat.org/min-42879.htmlMindat, Yttriaite-(Y), http://www.mindat.org/min-40471.html

References

Oxide minerals Scandium minerals Cubic minerals {{oxide-mineral-stub