Summary
A crystal-structure type may be characterized by the phase first found to belong to this type (prototype designation). Several symbol kinds have been developed to give a partial type description; they have a mnemotechnical function supplementary to the prototype designation. The merits of the different symbol kinds are apparent, so that a standardization of one of them would appear premature. The main problem of classification of metallic phases and structures lies in the search for a procedure to attribute to each phase a bonding type which indicates that the phase is energetically favorable.
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Schubert, K. On structure-type description. Bulletin of Alloy Phase Diagrams 5, 338–339 (1984). https://doi.org/10.1007/BF02872941
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DOI: https://doi.org/10.1007/BF02872941