Ba2[Ni3N2]: A Low-Valent Nitridonickelate — Synthesis, Crystal Structure, and Physical Properties.
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2006 Nickel I 7300 Ba 2 [Ni 3 N 2 ]: A Low-Valent Nitridonickelate — Synthesis, Crystal Structure, and Physical Properties. — The title compound is prepared by reaction of a stoichiometric mixture of Ba2N and Ni in a N2 stream (Ni crucible in a quartz reactor, ambient back-pressure, 1173 K, 10 d). Ba2[Ni3N2] crystallizes in the orthorhombic space group Cmca with Z = 4 (single crystal XRD and powder neutron diffraction). The structure is characterized by infinite puckered anionic ∞ 2 [Ni 3 ] layers. The average oxidation state of Ni in Ba2[Ni3N2] is +0.67, the lowest average value observed in nitridonickelates so far. Investigations of the physical properties demonstrate that the compound acts as a poor metal with a large resistivity of ≈2.7 mΩcm at 300 K and ex- hibits low-dimensional magnetism with antiferromagnetic ordering at ≈90 K. — (MEHTA, A.; HOEHN*, P.; SCHNELLE, W.; PETZOLD, V.; ROSNER, H.; BURKHARDT, U.; KNIEP, R.; Chem. Eur. J. 12 (2006) 6, 1667-1676; MPI Chem. Phys. fester Stoffe, D-01187 Dresden, Germany; Eng.) — Schramke 18- 022 N 4 - 2
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Transcript of Ba2[Ni3N2]: A Low-Valent Nitridonickelate — Synthesis, Crystal Structure, and Physical Properties.
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2006
NickelI 7300 Ba2[Ni3N2]: A Low-Valent Nitridonickelate — Synthesis, Crystal Structure, and
Physical Properties. — The title compound is prepared by reaction of a stoichiometric mixture of Ba2N and Ni in a N2 stream (Ni crucible in a quartz reactor, ambient back-pressure, 1173 K, 10 d). Ba2[Ni3N2] crystallizes in the orthorhombic space group Cmca with Z = 4 (single crystal XRD and powder neutron diffraction). The structure is characterized by infinite puckered anionic ∞
2[Ni3 ] layers. The average oxidation state of Ni in Ba2[Ni3N2] is +0.67, the lowest average value observed in nitridonickelates so far. Investigations of the physical properties demonstrate that the compound acts as a poor metal with a large resistivity of ≈2.7 mΩcm at 300 K and ex-hibits low-dimensional magnetism with antiferromagnetic ordering at ≈90 K. — (MEHTA, A.; HOEHN*, P.; SCHNELLE, W.; PETZOLD, V.; ROSNER, H.; BURKHARDT, U.; KNIEP, R.; Chem. Eur. J. 12 (2006) 6, 1667-1676; MPI Chem. Phys. fester Stoffe, D-01187 Dresden, Germany; Eng.) — Schramke
18- 022
N4-2
