An Introduction to the Rock-forming MineralsThis revised edition has entailed a thorough re-writing of the text, taking account of the impressive advances that have been made in all aspects of earth sciences, particularly mineralogy, over the recent years. |
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albite alkali feldspars Amer amphiboles analcite anorthite anthophyllite aragonite atoms augite axis biotite birefringence brown calcite cations chemical Chemistry chlorite Cleavage Twinning Colour colourless in thin common composition cordierite crystals di-octahedral diopside Dispersion distinguished dolomite end-member epidote extinction angle Fe2+ Fe3+ feldspars formula garnet glaucophane granites green H₂O hematite hornblende hydrothermal igneous rocks illite increase interlayer iron iron-rich jadeite kbar lamellar layers leucite magnetite metamorphism metamorphosed micas microcline minerals monoclinic muscovite nepheline occurs octahedral olivine optic axial angle Optical and Physical optical properties orthopyroxene orthorhombic oxides oxygen pale Paragenesis parallel pegmatites Petr phase phlogopite plagioclase plane Pleochroism potassium pressure pumpellyite pyroxene quartz range reaction refractive indices replacement riebeckite sanidine schists sillimanite SiO2 smectites solid solution space group spinel stability structure substitution temperature tetrahedra thin section TiO2 tourmaline tremolite triclinic Unit cell wollastonite wt per cent yellow zeolites zone ΑΙ