Kristall- und elektronische Struktur von LaAlSi2 / Crystal and Electronic Structure of LaAlSi2
2001 ◽
Vol 56
(7)
◽
pp. 620-625
◽
Keyword(s):
X Ray
◽
Abstract LaAlSi2 (a = 4.196(2), c = 11.437(7) Å; P3̄ml; Z = 2) was synthesized by arc-melting of preheated mixtures of the elements. The compound was investigated by means of X-ray methods and by neutron diffraction. The crystal structure can be described as a stacking variant of two different segments. The first one corresponds to the CaAl2Si2 structure type (LaAl2Si2), the second one with the A1B2 structure type (LaSi2). The segments are stacked along [001]. The electronic structure of the compound is discussed on the basis of LMTO band structure calculations.