Neutron powder diffraction study of the crystal structures of ZrAu

Contribution to the study of the Ce-Zr-Au system

“…The first one, detected at 383 3°C, is related to the triclinicmonoclinic transition of ZrAu observed around 400°C by neutron diffraction experiments [2]. It is interesting to note that this is most probably a second-order transition as no endothermic peak is detected by DTA.…”

“…% Au) follows our previous works on the ZrAu system [1] and the determination of the crystal structures of the equiatomic compound, ZrAu [2]. No experimental investigation of phase equilibria in the Ce-Zr-Au ternary system has been published.…”

“…1a). Recently, we have determined the three polymorphic forms of the congruent melting compound ZrAu by means of neutron powder diffraction [2]. At high temperature, ZrAu has a tetragonal structure (P4/mmm, a=4.835(2) Å and c=3.416(3) Å) related to the CsCl structure, leading to a monoclinic structure (P2/m, a=11.695(16) Å, b=4.828(3) Å, c=11.719(18) Å, =107.090(17)°) at 569°C.…”

Heat capacity of the AuZr compound obtained by high-temperature drop calorimetry

“…The results are discussed with regards to the crystalline transitions of ZrAu recently reported [9].…”

“…This work showed that the crystallographic study of the ZrAu phase is almost impossible with X-ray laboratory tools because of the rapid oxidation of the samples, which arises from room temperature. The crystal structure determination was later achieved using high-temperature neutron powder diffraction [9]. Few thermodynamic data are available concerning the ZrAu phase.…”