TY - JOUR
T1 - Eu10Mn6Sb13
T2 - A new ternary rare-earth transition-metal Zintl phase
AU - Holm, Aaron P.
AU - Park, Seon Mi
AU - Condron, Cathie L.
AU - Olmstead, Marilyn M.
AU - Kim, Hyungrak
AU - Klavins, Peter
AU - Grandjean, Fernande
AU - Hermann, Raphaěl P.
AU - Long, Gary J.
AU - Kanatzidis, Mercouri G.
AU - Kauzlarich, Susan M.
AU - Kim, Sung Jin
PY - 2003/7/28
Y1 - 2003/7/28
N2 - A new transition-metal-containing Zintl compound, Eu10Mn6Sb13, was prepared by a high-temperature Sn-flux synthesis. The structure was determined by single-crystal X-ray diffraction. Eu10Mn6Sb13 crystallizes in the monoclinic space group C2/m with a = 15.1791(6) Å, b = 19.1919(7) Å, c = 12.2679(4) Å, β = 108.078(1)°, Z = 4 (R1 = 0.0410, wR2 = 0.0920), and T = 90(2) K. The structure of Eu10Mn16Sb13 is composed of double layers of Mn-centered tetrahedra separated by Eu2+ cations. The double layers are composed of edge- and corner-sharing Mn-centered tetrahedra which form cavities occupied by Eu2+ cations and [Sb2]4- dumbbells. Linear [Sb3]5- trimers bridging two tetrahedra across the cavity are also present. Bulk susceptibility data indicate paramagnetic behavior with a ferromagnetic component present below 60 K. Temperature-dependent electrical resistivity measurements show semiconducting behavior above 60 K (Ea = 0.115(2) eV), a large and unusually sharp maximum in the resistivity at ∼40 K, and metallic behavior below 40 K. 151Eu Mössbauer spectra confirm that the europium is divalent with an average isomer shift of -11.2(1) mm/s at 100 K; the spectra obtained below 40 K reveal magnetic ordering of six of the seven europium sublattices and, at 4.2 K, complete ordering of the seven europium sublattices.
AB - A new transition-metal-containing Zintl compound, Eu10Mn6Sb13, was prepared by a high-temperature Sn-flux synthesis. The structure was determined by single-crystal X-ray diffraction. Eu10Mn6Sb13 crystallizes in the monoclinic space group C2/m with a = 15.1791(6) Å, b = 19.1919(7) Å, c = 12.2679(4) Å, β = 108.078(1)°, Z = 4 (R1 = 0.0410, wR2 = 0.0920), and T = 90(2) K. The structure of Eu10Mn16Sb13 is composed of double layers of Mn-centered tetrahedra separated by Eu2+ cations. The double layers are composed of edge- and corner-sharing Mn-centered tetrahedra which form cavities occupied by Eu2+ cations and [Sb2]4- dumbbells. Linear [Sb3]5- trimers bridging two tetrahedra across the cavity are also present. Bulk susceptibility data indicate paramagnetic behavior with a ferromagnetic component present below 60 K. Temperature-dependent electrical resistivity measurements show semiconducting behavior above 60 K (Ea = 0.115(2) eV), a large and unusually sharp maximum in the resistivity at ∼40 K, and metallic behavior below 40 K. 151Eu Mössbauer spectra confirm that the europium is divalent with an average isomer shift of -11.2(1) mm/s at 100 K; the spectra obtained below 40 K reveal magnetic ordering of six of the seven europium sublattices and, at 4.2 K, complete ordering of the seven europium sublattices.
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M3 - Article
C2 - 12870957
AN - SCOPUS:0038637358
VL - 42
SP - 4660
EP - 4667
JO - Inorganic Chemistry
JF - Inorganic Chemistry
SN - 0020-1669
IS - 15
ER -