Add time:08/01/2019         Source:sciencedirect.com

Lanthanum gallium manganese antimonide La12Ga3.5Mn0.5Sb23.5 is the first quaternary rare-earth antimonide containing a p-block metal and a transition metal. It has been synthesized by reaction of the elements and its structure has been determined by single-crystal X-ray diffraction methods (orthorhombic, space group D2h25−Immm, Z=2, a=4.3534(11) Å, b=19.814(5) Å, c=26.977(7) Å). La12Ga3.5Mn0.5Sb23.5 is a stuffed variant of the RE12Ga4Sb23-type structure: isolated GaSb3 trigonal planes are located within groupings of La6 trigonal prisms that are surrounded by five- and six-atom wide Sb ribbons, which are connected by Ga2 pairs, GaSb6 octahedra, or MnSb4 tetrahedra. The electrical resistivity along a is 3.0×10–3 Ω cm at room temperature and shows little temperature dependence.

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