Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education)/College of Physics, Jilin University, Changchun 130012, PR China.
Dalton Trans. 2013 Feb 7;42(5):1394-9. doi: 10.1039/c2dt32158k. Epub 2012 Nov 8.
A new nickel tellurite oxohalide, Ni(15)Te(12)O(34)Cl(10), has been prepared by chemical vapour transport reactions and the crystal structure was determined by single-crystal X-ray diffraction. The compound crystallizes in the triclinic space group P1[combining macron] with the pseudomonoclinic cell parameters a = 10.3248(6) Å, b = 10.3249(6) Å, c = 11.6460(8) Å, α = 73.782(6)°, β = 73.782(6)°, γ = 63.51(2)°, Z = 1, R(1) = 0.0264. The Ni(2+) ions have octahedral [NiO(6)] and [NiO(4)Cl(2)] coordinations, the Te(4+) ions have one-sided [TeO(3)] and [TeO(4)] coordinations. The crystal structure can be described as consisting of nickel oxide ribbons extending along (001) that are connected by corner sharing [TeO(3)] and [TeO(4)] groups to build the open framework structure. The chlorine atoms and the Te-lone pairs are facing voids in the oxide framework. The new compound undergoes two successive antiferromagnetic ordering transitions at ∼50 K and ∼10 K. The Curie-Weiss temperature obtained from detailed evaluation of the high-temperature magnetic susceptibilities is positive indicating predominant ferromagnetic superexchange interactions between the Ni magnetic moments.
一种新的镍碲氧卤化物，Ni(15)Te(12)O(34)Cl(10)，通过化学气相输运反应制备，并通过单晶 X 射线衍射确定了晶体结构。该化合物在三斜晶系 P1[combining macron]空间群中结晶，具有拟单斜晶胞参数 a = 10.3248(6) Å, b = 10.3249(6) Å, c = 11.6460(8) Å, α = 73.782(6)°, β = 73.782(6)°, γ = 63.51(2)°, Z = 1, R(1) = 0.0264。Ni(2+)离子具有八面体[NiO(6)]和[NiO(4)Cl(2)]配位，Te(4+)离子具有单侧[TeO(3)]和[TeO(4)]配位。晶体结构可以描述为由沿(001)延伸的氧化镍带组成，这些带通过顶角共享[TeO(3)]和[TeO(4)]基团连接，形成开放骨架结构。氯原子和 Te-孤对电子面向氧化物骨架中的空隙。新化合物在 50 K 和 10 K 附近经历两个连续的反铁磁有序转变。从高温磁化率的详细评估中得到的居里-外斯温度为正，表明 Ni 磁矩之间主要存在铁磁超交换相互作用。
