請教依各問題.謝謝 - 地球科學討論

By Hedda
at 2003-12-01T12:14
at 2003-12-01T12:14
Table of Contents
If some sodium (Na+) substitutes for calcium (Ca2+)in the plagioclase feldspars, why must some aluminum (Al3+)replace some silicon (Si4+) in the mineral's structure ??
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