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Table 5 Composition of plagioclase in SW9

From: The Theodul Glacier Unit, a slab of pre-Alpine rocks in the Alpine meta-ophiolite of Zermatt-Saas, Western Alps

 12
SiO262.6062.57
Al2O323.2923.55
FeO0.090.06
MgO0.000.00
CaO4.334.46
Na2O9.248.91
K2O0.100.09
Total99.7999.71
Si2.7802.776
Al1.2191.231
Fe2+0.0030.002
Mg0.0000.000
Ca0.2060.212
Na0.7950.766
K0.0060.005
SUM5.0114.994
Ab78.9877.92
An20.4621.56
Or0.560.52
  1. Total includes traces of Ti, Cr and Mn