New phases in the Yb–Au–Si and Ca–Au–Si systems

✍ Scribed by Pani, M.; Merlo, F.; Fornasini, M. L.

• Book ID: 120665656
• Publisher: Oldenbourg Wissenschaftsverlag
• Year: 1999
• Tongue: English
• Weight: 492 KB
• Volume: 214
• Category: Article
• ISSN: 2194-4946
• DOI: 10.1524/zkri.1999.214.2.108

✦ Synopsis

Abstract

The YbAu~2–x~Si~x~ and CaAu~2–x~Si~x~ systems were studied by X-ray techniques in the range 0.7 ≤ x ≤ 1.3. The YbAuSi compound forms peritectically at 1478 K and is stable till 1168 K in its high-temperature form (EuAuGe type); below 1168 K the SrAgGe type occurs. No equiatomic compound exists in the Ca–Au–Si system. In the gold- and silicon-rich regions the two systems show similar structural behaviour: the gold-rich phases belong to the CeCu~2~ or the EuAuGe type, while the silicon-rich phases crystallize in the A1B~2~ type. The magnetic susceptibility at room temperature indicates the divalency of ytterbium in YbAuSi.