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Table 1 Chemical compositions of starting materials

From: Melting phase relations in the MgSiO3–CaSiO3 system at 24 GPa

Name Phasea MgO CaO SiO2 Total (wt.%) Mg Ca Si ∑Cationb Mg/(Mg + Ca)
Mg90 Mixture 35.63(22) 5.30(45) 58.87(54) 99.79(33) 0.903(1) 0.097(9) 1.001(4) 2.000(4) 0.904(8)
Mg75 Glass (29) 28.99(22) 13.67(10) 57.12(42) 99.78(50) 0.753(5) 0.255(2) 1.004(2) 2.004(3) 0.747(2)
Mg50 Glass (26) 18.53(16) 25.65(15) 54.89(36) 99.07(59) 0.503(3) 0.500(2) 0.999(2) 2.001(2) 0.501(2)
  1. aNumber of electron microprobe analyses is shown in parentheses. Mg90 is a mixture of glass and oxides; see the main text for details
  2. bNumber of oxygen is 3