[sohd-l-ahyt] 
| a mineral, sodium aluminum silicate, Na4Al3Si3O1 2Cl, occurring massive and in crystals, usually blue in color and found in certain alkali-rich igneous rocks. |
| so·da·lite (sōd'l-īt') n. A blue-white mineral, Na4Al3Si3O12Cl, found in silica-poor igneous rocks. |
sodalite
feldspathoid mineral, a chloride-containing sodium aluminosilicate that occurs with leucite and nepheline in such igneous rocks as nepheline syenite, trachyte, and phonolite. For chemical formula and detailed physical properties, see feldspathoid (table)
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lˌaɪt