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Cover Picture: Interpenetrating Polar and Nonpolar Sublattices in Intermetallics: The NaCd 2 Structure (Angew. Chem. Int. Ed. 12/2007)
Author(s) -
Fredrickson Daniel C.,
Lee Stephen,
Hoffmann Roald
Publication year - 2007
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200790040
Subject(s) - intermetallic , cover (algebra) , glory , crystallography , polar , materials science , physics , condensed matter physics , chemistry , metallurgy , optics , quantum mechanics , engineering , mechanical engineering , alloy
The sun and the moon are not quite equal partners; the two clusters shown in the cover picture are more so. They rise and set in several incredibly complex intermetallic phases, such as NaCd 2 . As explained by R. Hoffmann and co‐workers in their Review on page 1958 ff., an electronic Aufbau based on these clusters generates the full NaCd 2 structure in all its glory: the clusters build two interpenetrating networks that strive for the extremes of polarity and nonpolarity. The alchemical image, drawn by Robert Vaughn, is from Elias Ashmole's Theatricum Chemicum Britannicum.