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nepheline |
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nephelineor nepheliteMost common feldspathoid mineral, an aluminosilicate of sodium and potassium (Na3KAl4Si4O16). It is sometimes used as a substitute for feldspars in the manufacture of glass and ceramics. |
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62 Ga--emplacement of small post-tectonic granite, nepheline syenite, and carbonatite intrusions, and protracted post-metamorphic hydrothermal activity focused mainly along fault zones. This statistical market research report covers feldspar, leucite, nepheline and nepheline syenite. All basalt chemical compositions can be plotted in the basalt tetrahedron, which has normative quartz, olivine, nepheline and augite at the apices. |
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