Melilite Crystallization in the System CaO-MgO-Al2O3-SiO2

G. M. Biggar and M. J. O'Hara
Grant Institute of Geology, University of Edinburgh, West Mains Road, Edinburgh EH9 3JW

Summary: The solidus temperatures (IPTS-68) and melilite compositions (mole %) determined for some four-phase assemblages in the system CaO-MgO-Al2O3-SiO2 are: anorthite, diopside, spinel melilite (Åk81Geh19), 1236·5 °C; diopside, spinel, forsterite, melilite (Åk83Geh17), 1238 °C; foresterite, spinel, monticellite, melilite (Åk82Geh18), 1351 °C; monticellite, merwinite, spinel, melilite (Åk52Geh48), 1378 °C; dicalcium-silicate, Ca5MgSi3O12, spinel, melilite (Åk5Geh95), ca. 1412 °C; dicalcium-silicate, Ca6MgAl8SiO21, spinel, melilite (Åk4Geh96), ca. 1347 °C.

Mineralogical Magazine; December 1972 v. 38; no. 300; p. 918-925; DOI: 10.1180/minmag.1972.038.300.02
© 1972, The Mineralogical Society
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