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1800 1600 1400 1200 1000 800 20 40 60 80 100 T Wt% SiO2 SiO2 KAlSi O2 6 Leu K-feldspar KAlSi O3 8 melt leucite + melt tridymite + melt K-spar +meltleucite + K-spar K-spar + tridymite K-spar + quartz P E eutectic peritectic leucite quartz tridymite cristobalite + melt KAlSi O - SiO2 6 2 1800 1600 1400 1200 1000 800 leucite + melt tridymite + melt K-spar +meltleucite + K-spar K-spar + tridymite K-spar + quartz P E cristobalite + melt 1750 T C o melt composition 70% leu - 30% SiO2 70% KAlSi O - 30% SiO2 6 2 melt 100% melt 0% leucite 0% K-feldspar 0% cristobalite 0% tridymite 0% quartz 40200 60 100 Wt % SiO2KAlSi O Leu 2 6 K-feldspar KAlSi O3 8 leucite quartz tridymite 80 1800 1600 1700 1400 1200 1000 800 T C o leucite + melt tridymite + melt K-spar +meltleucite + K-spar K-spar + tridymite K-spar + quartz cristobalite + melt melt melt composition 70% leu - 30% SiO2 100% melt 0% leucite 0% K-feldspar 0% cristobalite 0% tridymite 0% quartz 70% KAlSi O - 30% SiO2 6 2 40200 60 100 Wt % SiO2KAlSi O Leu 2 6 K-feldspar KAlSi O3 8 leucite quartz tridymite 80 1800 1600 1400 1200 1000 800 T C o leucite + melt tridymite + melt K-spar +meltleucite + K-spar K-spar + tridymite K-spar + quartz cristobalite + melt melt composition 70% leu - 30% SiO2 100% melt 0% leucite 0% K-feldspar 0% cristobalite 0% tridymite 0% quartz melt 70% KAlSi O - 30% SiO2 6 2 40200 60 100 Wt % SiO2KAlSi O Leu 2 6 K-feldspar KAlSi O3 8 leucite quartz tridymite 80 1800 1600 1400 1490 1200 1000 800 T C o leucite + melt tridymite + melt K-spar +meltleucite + K-spar K-spar + tridymite K-spar + quartz cristobalite + melt melt 99% melt 0% K-feldspar 0% cristobalite 0% tridymite 0% quartz 1% leucite melt composition 69% leu - 31% SiO2 70% KAlSi O - 30% SiO2 6 2 40200 60 100 Wt % SiO2KAlSi O Leu 2 6 K-feldspar KAlSi O3 8 leucite quartz tridymite 80 1800 1600 1400 1200 1000 800 T C o leucite + melt tridymite + melt K-spar +meltleucite + K-spar K-spar + tridymite K-spar + quartz cristobalite + melt melt 83% melt 0% K-feldspar 0% cristobalite 0% tridymite 0% quartz 17% leucite melt composition 64% leu - 36% SiO2 70% KAlSi O - 30% SiO2 6 2 40200 60 100 Wt % SiO2KAlSi O Leu 2 6 K-feldspar KAlSi O3 8 leucite quartz tridymite 80 1800 1600 1400 1200 1300 1000 800 T C o leucite + melt tridymite + melt K-spar +meltleucite + K-spar K-spar + tridymite K-spar + quartz cristobalite + melt 75% melt 0% K-feldspar 0% cristobalite 0% tridymite 0% quartz 25% leucite melt melt composition 60% leu - 40% SiO2 70% KAlSi O - 30% SiO2 6 2 40200 60 100 Wt % SiO2KAlSi O Leu 2 6 K-feldspar KAlSi O3 8 leucite quartz tridymite 80 1800 1600 1400 1200 1000 800 T C o leucite + melt tridymite + melt K-spar +meltleucite + K-spar K-spar + tridymite K-spar + quartz cristobalite + melt melt 68% melt 0% K-feldspar 0% cristobalite 0% tridymite 0% quartz 32% leucite melt composition 56% leu - 44% SiO2 70% KAlSi O - 30% SiO2 6 2 40200 60 100 Wt % SiO2KAlSi O Leu 2 6 K-feldspar KAlSi O3 8 leucite quartz tridymite 80 1800 1600 1400 1200 1149 1000 800 T C o leucite + melt tridymite + melt K-spar +meltleucite + K-spar K-spar + tridymite K-spar + quartz cristobalite + melt melt melt leucite K-feldspar melt composition 55% leu - 45% SiO2 70% KAlSi O - 30% SiO2 6 2 40200 60 100 Wt % SiO2KAlSi O Leu 2 6 K-feldspar KAlSi O3 8 leucite quartz tridymite 80 1800 1600 1400 1200 1100 1000 800 T C o leucite + melt tridymite + melt K-spar +meltleucite + K-spar K-spar + tridymite K-spar + quartz cristobalite + melt melt 30% melt 0% leucite 0% cristobalite 0% tridymite 0% quartz 70% K-feldspar melt composition 51% leu - 49% SiO2 70% KAlSi O - 30% SiO2 6 2 40200 60 100 Wt % SiO2KAlSi O Leu 2 6 K-feldspar KAlSi O3 8 leucite quartz tridymite 80 1800 1600 1400 1200 1000 800 T C o leucite + melt tridymite + melt K-spar +meltleucite + K-spar K-spar + tridymite K-spar + quartz cristobalite + melt melt 25% melt 0% leucite 0% cristobalite 0% tridymite 0% quartz 75% K-feldspar melt composition 46% leu - 54% SiO2 70% KAlSi O - 30% SiO2 6 2 40200 60 100 Wt % SiO2KAlSi O Leu 2 6 K-feldspar KAlSi O3 8 leucite quartz tridymite 80 1800 1600 1400 1200 1000 800 900 T C o leucite + melt tridymite + melt K-spar +meltleucite + K-spar K-spar + tridymite K-spar + quartz cristobalite + melt melt gone melt 0% melt 0% leucite 0% cristobalite 0% quartz 90% K-feldspar 10% tridymite 70% KAlSi O - 30% SiO2 6 2 40200 60 100 Wt % SiO2KAlSi O Leu 2 6 K-feldspar KAlSi O3 8 leucite quartz tridymite 80 1800 1600 1400 1200 1000 800 T C o leucite + melt tridymite + melt K-spar +meltleucite + K-spar K-spar + tridymite K-spar + quartz cristobalite + melt melt gone 0% melt 0% leucite 0% cristobalite 0% tridymite 90% K-feldspar 10% quartz10% quartz melt 70% KAlSi O - 30% SiO2 6 2 40200 60 100 Wt % SiO2KAlSi O Leu 2 6 K-feldspar KAlSi O3 8 leucite quartz tridymite 80 00-LeuQzB.eps 01-LeuQzB1750.eps 02-LeuQzB1700.eps 04-LeuQzB1600.eps 05-LeuQzB1490.eps 06-LeuQzB1400.eps 07-LeuQzB1300.eps 08-LeuQzB1200.eps 09-LeuQzB1149.eps 10-LeuQzB1100.eps 11-LeuQzB1000.eps 12-LeuQzB0900.eps 13-LeuQzB0800.eps
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