title: Uranium cobalt tetraaluminide, UCoAl4.
abstract: The structure of UCoAl(4) can be viewed as a succession of atomic layers, with the compositions UCoAl and Al(3), that alternate along the c axis. The packing within the pure Al layer at z = 1/2 results from edge-sharing of triangles, squares and pentagons of Al atoms. Two successive Al(3) layers thus define pentagonal, square-based and trigonal prisms which are centred at z = 0 by the U, Co and remaining Al atoms. UCoAl(4) is a high-temperature phase that is only observed in as-cast samples.
authors.affiliation: W. Trzebiatowski Institute of Low Temperature and Structure Research, PO Box 1410, 50-950 Wrocław, Poland.
authors.forename: J
authors.initials: J
authors.lastname: Stêpien-Damm
authors.forename: O
authors.initials: O
authors.lastname: Tougait
authors.forename: V I
authors.initials: VI
authors.lastname: Zaremba
authors.forename: H
authors.initials: H
authors.lastname: Noël
authors.forename: R
authors.initials: R
authors.lastname: Troc