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镁铝榴石Cr2O3-CaO关系图[ 27 ] G 0.非榴石类矿物; G1.钛镁榴石; G3.钙镁铝榴石-铁铝榴石; G 4.钛钙镁铁铝榴石; G5.镁铁铝榴石; G9.铬镁铝榴石; G10.镁铝榴石; G12.镁钙铬榴石-镁铝榴石