[an-dl-oo-sahyt] 
| an orthorhombic form of aluminum silicate, Al2SiO5, found in schistose rocks. |
| an·da·lu·site (ān'də-lōō'sīt') n. A mineral, aluminum silicate (Al2SiO5), usually found in orthorhombic crystals of various colors. [After Andalusia.] |
andalusite
(Al2SiO5), aluminum silicate mineral that occurs in relatively small amounts in various metamorphic rocks, particularly in altered sediments. It is found in commercial quantities in the Inyo Mountains, Mono county, Calif., in the United States; in Kazakhstan; and in South Africa. Such deposits are mined as a raw material for refractories and porcelain used in spark plugs and other products. For detailed physical properties, see silicate mineral (table 2)
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dlˈu
