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Table 6 Chemical composition of magnesite Units are weight percent of oxides and atoms per formula unit

From: Melting carbonated epidote eclogites: carbonatites from subducting slabs

Run

SPT1

EFSP2

SPT2

P (GPa)

3.7

3.8

3.8

T (°C)

750

800

775

FeO

9.10 (0.77)

7.04 (3.15)

7.32 (0.67)

MgO

38.27 (1.67)

40.87 (2.97)

39.38 (0.79)

CaO

2.40 (0.59)

2.09 (0.79)

2.73 (0.52)

Na2O

0.12 (0.14)

0.06 (0.06)

0.05 (0.06)

CO2

50.75 (1.31)

51.04 (0.74)

51.33 (1.11)

Total

100.68 (2.59)

101.12 (1.07)

100.85 (2.88)

Fe2+

0.110 (0.008)

0.085 (0.039)

0.087 (0.006)

Mg

0.823 (0.024)

0.874 (0.053)

0.838 (0.032)

Ca

0.037 (0.008)

0.032 (0.013)

0.042 (0.007)

Na

0.003 (0.004)

0.002 (0.002)

0.002 (0.002)

C

1.000 (0.000)

1.000 (0.000)

1.000 (0.000)