oxide	155-1core	155-1rim	188-3.2Acore	188-3.2Arim
SiO2	37.04	37.25	37.35	37.29
TiO2	0	0	0.03	0.01
Al2O3	0	0	0.01	0.01
Cr2O3	0	0	0.01	0
FeO	31.36	30.73	27.88	28.01
MnO	0.48	0.53	0.37	0.37
MgO	31.32	31.4	34.61	34.41
CaO	0.01	0.01	0.03	0.02
Na2O	0.02	0.06	0	0.01
Total	100.24	99.98	100.28	100.13