A Metastable Aluminosilica Compound for Aluminum and Water Transport to the Upper Mantle

Table 1

Composition (oxide wt%) of phase egg (calculated on a water-free basis) obtained in laboratory simulation experiments [7, 8], including a sediment analog that contained minor <1.5 wt%, TiO₂, FeO, trace amounts (<0.52 wt%) of MgO, CaO, Na₂O, and K₂O, and 6 wt% H₂O [5], and the vapor-condensed, amorphous, metastable eutectic aluminosilica compound [10].

Al2O3	SiO2	Source
Phase egg
44.9	55.1	[7]
45.5	54.5	[7]
45.6	54.1	[7]
45.9	54.1	[8]
Subducting sediment experiment
44.2	55.8	[5]
Metastable aluminosilica compound
46.7	53.3	[10]