Nepheline - What does it mean?
nepheline | |
has no English definition.
(mineralogy) A feldspathoid mineral of silica-poor igneous, plutonic and volcanic rocks. Chemically, nepheline is a plagioclase feldspar with insufficient silica to satisfy the chemical bonds. Because of the unfilled bonds, nepheline rapidly and can only be seen as inclusions in freshly broken rock.
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has no English definition.