Table 2. Compositions (at./f.u.) of the Ba8–xCexAuySi46–y Phases in the Course of Successive Attempts to Isolate the Clathrate in Phase Pure Forma.
starting composition | clathrate phase Ph1 | starting composition (same as Ph1) | clathrate phase Ph2 | starting composition (same as Ph2) | clathrate phase Ph3 | |
---|---|---|---|---|---|---|
Ba | 6.00 | 7.61 | 7.61 | 7.40 | 7.40 | 7.65 |
Ce | 2.00 | 0.65 | 0.65 | 0.27 | 0.27 | 0.0 |
Au | 6.00 | 5.72 | 5.72 | 5.18 | 5.18 | 5.08 |
Si | 40.00 | 40.01 | 40.01 | 40.58 | 40.58 | 41.37 |
The EDX compositions of the phases Ph1 and Ph2 were used as starting compositions for the synthesis yielding the clathrate phases Ph2 and Ph3, respectively.