结果表明：粉煤灰中铝氧多面体主要以四面体和八面体形式存在。
The results showed that tetrahedron and octahedron are the main forms of aluminum-oxide polyhedron in raw fly ash, and they exist in a multi-structural surrounding.
其主要结构单元是硅一氧四面体和铝一氧八面体。
The main structure unit of clay minerals contains silicon-oxygen tetrahedron and aluminium-oxygen octahedron.
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