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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The structure of a new magnesium nitridoboride, MgNB9, has been refined from single-crystal X-ray data. The Mg and N atoms lie on sites with crystallographic 3m symmetry. The structure consists of two layers alternating along the c axis. The NB6 layer, with B-12 icosahedra, has the C2B13 structure type. Within this layer, boron icosahedra are bonded to N atoms, each coordinating to three boron polyhedra. Another MgB3 layer, with B-6 octahedra, does not belong to any known structure type. The boron icosahedra and octahedra are connected to each other, thus forming a three-dimensional boron framework.