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Ternary antimonide NaCd 4 Sb 3 : hydride synthesis, crystal structure and transport properties
Author(s) -
Courteau Brittany,
Gvozdetskyi Volodymyr,
Lee Shan,
Cox Tori,
Zaikina Julia V.
Publication year - 2022
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.202200095
Subject(s) - antimonide , isostructural , hydride , crystal structure , crystallography , materials science , ternary operation , sodium hydride , metal , powder diffraction , thermoelectric effect , zintl phase , phase (matter) , chemistry , metallurgy , organic chemistry , programming language , physics , computer science , thermodynamics
A new compound NaCd 4 Sb 3 ( R 3 ‾ m , a =4.7013(1) Å, c =35.325(1), Å, Z=3, T =100 K) featuring the RbCd 4 As 3 structure type has been discovered in the Na−Cd−Sb system, in addition to the previously reported NaCdSb phase. NaCd 4 Sb 3 and NaCdSb were herein synthesized using sodium hydride as the source of sodium. The hydride method allows for targeted sample composition, improved precursor mixing, and an overall quicker synthesis time when compared to traditional methods using Na metal as a precursor. The NaCd 4 Sb 3 structure was determined from single‐crystal X‐ray diffraction and contained the splitting of a Cd site not seen in previous isostructural phases. NaCd 4 Sb 3 decomposes into NaCdSb plus melt at 766 K, as determined via in‐situ high‐temperature PXRD. The electronic structure calculations predict the NaCd 4 Sb 3 phase to be semi‐metallic, which compliments the measured thermoelectric property data, indicative of a p ‐type semi‐metallic material. The crystal structure, elemental analysis, thermal properties, and electronic structure are herein discussed in further detail.