Modulated corrugations in the crystal structure of the superconductor CaAlSi.
We report the crystal structure analyses of CaAlSi from single-crystal and powder X-ray diffraction and the existence of two commensurately modulated phases, a sixfold and a fivefold modulated structure. This polymorphism seems to be correlated to the thermal history of the sample. We describe both modulated structures using a three-dimensional and a (3 + 1)-dimensional formalism.
Sparta
Karine M
KM
Institut für Kristallographie der RWTH Aachen, Jägerstrasse 17-19, 52056 Aachen, Germany. sparta@xtal.rwth-aachen.de
Müller
Ralf
R
Merz
Michael
M
Roth
Georg
G
Adelmann
Peter
P
Wolf
Thomas
T