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Na x Mg 5− x Ga 9 , a New Intermetallic Phase as a Link Between Zintl Phases and Metals
Author(s) -
Nesper Reinhard
Publication year - 1989
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.198900581
Subject(s) - intermetallic , polyhedron , crystallography , zintl phase , phase (matter) , atom (system on chip) , materials science , metal , structure type , electron counting , crystal structure , chemistry , electron , metallurgy , alloy , physics , mathematics , organic chemistry , quantum mechanics , computer science , embedded system , geometry
Na x Mg 5− x Ga 9 crystallizes in a new structure type in which the Ga atoms form a three‐dimensional framework of linked icosahedra and Friauf polyhedra. These two types of polyhedra are typical for intermetallic phases. The compound shows a considerable phase width. The structure determination gives indications that, despite the metallic properties, variable electron numbers cause local changes of the chemical bonding which only take place at a single terminally bound Ga atom.