Rare-earth bismuthides

Lanthanum and Praseodymium Bromide Pnictides. A Convergence of Interstitial Chemistry in Cluster Halides and Intermetallic Pnictides

“…Furthermore, comparisons of the present dimensions of the bismuth bromide phases with literature data for R Bi require more careful consideration because there is good evidence that at least La Bi exists only as a ternary compound (i.e., a Nowotny phase (10)). First, two sets of literature data for the supposed binary La Bi (25,26) differ by 0.045(2) A s (0.5%) in a, but only 0.003 A s (1 ) in c, good evidence of the presence of interstitial impurities in at least one instance. The larger of these sets of dimensions yields a 2.1% volume increase on incorporation of Br.…”

Powder data for some new europium antimonides and bismuthides

“…The maximum temperature of anneal was 1173 K and the range of composition was 40-60 at.% Sb or Bi. Material analyses have been given by Taylor, Calvert, Utsunomiya, Wang & Despault (1978); Yoshihara, Taylor, Calvert & Despault (1975).…”

Isothermal section of the Ho–Co–Bi system at 800°C and new ternary Mo5B2Si-type bismuthides R5Co2Bi (R=Gd, Ho, Dy)

“…There has been some uncertainty in the literature about the nature of R 5 MBi 2 phases [2,9]. The b-Yb 5 Sb 3 -type structure [19] adopted by Ho 5 Co x Bi 3Àx , reported herein, is not the same as the Y 5 Bi 3 -type structure [20] adopted by the binary phase Ho 5 Bi 3 (and other late rare-earth bismuthides R 5 Bi 3 ) [21]. (The reported atomic coordinates for Ho 5 Bi 3 appear problematic as they lead to extremely short Ho-Bi distances (w2.1 Å) for one of the Ho atoms [22].)…”