Void channels in the Nb3Te4, Ta2S, and Nb2Se structure types; the structure of Nb3Se4
1971; Elsevier BV; Volume: 3; Issue: 2 Linguagem: Inglês
10.1016/0022-4596(71)90036-3
ISSN1095-726X
Autores Tópico(s)MXene and MAX Phase Materials
ResumoThe crystal structure of Nb3Se4 has been determined and refined by single-crystal X-ray methods. The final unweighted R factor of the hexagonal unit cell (space group P63m, a = 10.0074 ± 15 and c = 3.4667 ± 8 Å) equaled 0.058. The phase Nb3Se4 is isostructural with Nb3S4 and Nb3Te4. The existence of similar void channels in the Nb3Te4 structure type and the Ta2S and Nb2Se structures and a rationale for the nonexistence of a phase exhibiting the Nb3Te4 structure type in which another Group VB transition metal is substituted for Nb are discussed.
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