BORATE MINERALS. II. A HIERARCHY OF STRUCTURES BASED UPON THE BORATE FUNDAMENTAL BUILDING BLOCK
BORATE MINERALS. II. A HIERARCHY OF STRUCTURES BASED UPON THE BORATE FUNDAMENTAL BUILDING BLOCK
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DOI：
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发表时间：
1999-06
影响因子：
0.9
通讯作者：
J. Grice;P. Burns;F. Hawthorne
中科院分区：
文献类型：
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作者：
J. Grice;P. Burns;F. Hawthorne
基于(BQ)三角形和(BO+)四面体的连接形成FBB(基本构建块)，并聚合形成结构单元，该结构单元是一个紧密结合的阴离子多面体阵列，其过剩电荷因大的低价间隙阳离子的存在而平衡。31种矿物，19种不同的结构类型，含有孤立的硼酸盐多面体。二十七种矿物，二十五种不同的结构类型，包含有限的硼酸盐多面体簇。十种矿物，具有十种不同的结构类型，含有硼酸盐多面体的链状结构。15种矿物，13种不同的结构类型，含有片状的硼酸盐多面体。15种矿物，13种不同的结构类型，含有硼酸盐多面体骨架。只有孤立多面体类的紧密堆积结构才表现出显著的同型性。
A hierarchical structural classification is developed for borate minerals, based on the linkage of (BQ) triangles and (BO+) tetrahedra to form FBBs (fundamental building blocks) that polymerize to form the structural unit, a tightly bonded anionic polyhedral array whose excess charge is baianced by the presence of large low-valence interstitial cations. Thirty-one minerals, with nineteen distinct structure-types, contain isolated borate polyhedra. Twenty-seven minerals, with twenty-five distinct structure-types, contain finite clusters of borate polyhedra. Ten minerals, with ten distinct structue-types, contain chains of borate polyhedra. Fifteen minerals, with thirteen distinct structue-types, contain sheets of borate polyhedra. Fifteen minerals, with thirteen distinct sEucture-types, contain frameworks of borate polyhedra. It is only the close-packed structures of the isolatedpolyhedra class that show significant isotypism