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Alkaline phlogopite mica

Apatite of igneous origin is preferentially associate with alkaline intrusions and carbonatites. Common minerals associated with apatite-bearing alkaline igneous intrusions include nepheline, alkali feldspars, micas, pyroxenes, and amphiboles. Commonly the pyroxenes and amphiboles are Mg- or Fe-iich varieties, and the micas are biotite or phlogopite. [Pg.97]

KAl2(AlSi3)Oio(OH,F)2, muscovite, and KMg3(AlSi3)Oio(OH,F)2, phlogopite. Both are somewhat harder than talc (Mohs hardness of 2-3) but, since they are platy in nature, are softer and less abrasive than calcium carbonate. Mica fillers have a specific gravity of about 2.8 and are slightly alkaline (pH about 8). [Pg.166]

See other pages where Alkaline phlogopite mica is mentioned: [Pg.125]    [Pg.127]    [Pg.130]    [Pg.125]    [Pg.127]    [Pg.130]    [Pg.169]    [Pg.321]    [Pg.253]    [Pg.37]    [Pg.489]   
See also in sourсe #XX -- [ Pg.125 , Pg.126 , Pg.127 , Pg.128 ]



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