Data of GeochemistryU.S. Government Printing Office, 1962 - Geochemistry |
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Common terms and phrases
2FeO 2MgO 2Na₂O 2SiO 3CaO a-CaO akermanite Al₂O albite anorthite B-CaO SiO2 binary system boundary curve CaO Al2O3 2SiO2 CaO FeO CaO SiO2 Composition of liquid cordierite corundum cristobalite crystallization DEGREES CENTIGRADE diopside enstatite equilibrium fayalite Fe₂O FeO SiO2 field figure 71 FORSTERITE gehlenite Greig HEMATITE hercynite invariant point join Jour K₂O Kracek leucite liquid percent MAGNETITE melilite melting point melts congruently melts incongruently metasilicate MgO Al2O3 MgO SiO2 mixture Modified from Schairer Morey Muan mullite Na₂O Na₂O Al2O3 Na₂O SiO2 nepheline olivine Osborn oxide oxygen percent Al2O3 percent by weight percent CaO SiO2 PERCENT SiO2 FIGURE Phase reaction phase-equilibrium diagram piercing point plagioclase point on fig potassium feldspar pressure primary phase volumes protoenstatite pseudowollastonite quartz quaternary system reaction point Schairer shown in figure silica spinel stable studied system Na₂O ternary eutectic ternary system tetrahedron TiO2 tion triangle tridymite ture WEIGHT PERCENT SiO2 wollastonite solid solution wüstite