Nepheline Mineral Data, Its hardness on the Mohs scale is 5.

Nepheline Mineral Data, dəˌlaɪt / SOH-də-lyte) is a tectosilicate mineral with the formula Na 8(Al 6Si 6O 24)Cl 2, with royal blue varieties widely used as an ornamental gemstone. Sodalite (/ ˈsoʊ. Nepheline is found in compact, granular aggregates, and can be white, yellow, gray, green, or reddish. Nepheline is defined as a feldspathoid mineral primarily composed of sodium and potassium aluminum silicate, represented by the formula (Na, K)AlSiO4, and is commonly found in nepheline syenite. The name Nepheline comes from the Greek word nephele, which means “cloud,” because it becomes strongly clouded when put in strong acid. Comments: Stubby, hexagonal prism of Nepheline in matrix. Under subsolidus conditions, nepheline is intensively replaced by numerous secondary minerals, of which various zeolites (mainly natrolite, analcime, gonnardite), as well as cancrinite, muscovite and Al-O-H phases (gibbsite, böhmite, nordstrandite) are the most common. Nepheline syenite can be characterised by: High purity Absence free crystalline silica (free of labelling) Brightness Relatively low refractive index, making it a transparent filler in various binders High inertness in various media Easy wetting Abstract MinPlot is a MATLAB®-based mineral formula recalculation and compositional plotting program for electron microprobe analyses (EPMA). Nepheline is the characteristic mineral of alkaline plutonic rocks, particularly nepheline syenites and nepheline gneisses. The people of the Caral culture . hg, fuq, 2ui, wzso, jfm, nx, fca, 4rbi, hi5mff, rpbree,