Cobalt--zirconium (1/2) | 12187-27-8

• 分子结构分类: 无机化合物 - 均相金属化合物 - 均相过渡金属化合物
• 英文名称: Cobalt--zirconium (1/2)
• 英文别名: cobalt;zirconium
• CAS: 12187-27-8
• 化学式: CoZr₂
• 分子量: 241.441
• InChiKey: VDTRNGYWXMPEJN-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.01
• 重原子数：
  3
• 可旋转键数：
  0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为反应物：
  描述：

  Cobalt--zirconium (1/2) 、 硫酸 生成 cobalt(II) sulfate
  参考文献：
  名称：

  ZALETILO, L. S.;LAVRENKO, V. A.;RATUSHNAYA, V. ZH., XIM. TEXNOL.,(1990) N, S. 24-27

  摘要：

  DOI：
• 作为产物：
  描述：

  以 neat (no solvent, solid phase) 为溶剂， 生成 Cobalt--zirconium (1/2) 、 氢气
  参考文献：
  名称：

  Hydrogen-induced disproportionation of Zr2M (M=Fe, Co, Ni) and reproportionation

  摘要：

  Hydrogen induced disproportionation and reproportionation for Zr2Fe, Zr2Co and Zr2Ni were studied by means of volumetric measurements of hydrogen absorption and desorption, and X-ray diffraction analyses of the product phases. These alloys formed respective hydrides of Zr2MH5 (M=Fe, Co and Ni) type at room temperature only under conditions of very slow hydrogen absorption, otherwise the alloys disproportionated. Heating Zr2MH5 to 1073 K gave Zr2Ni and Zr2Co through decomposition, disproportionation and reproportionation. On the other hand, heating Zr2FeH5 to 1073 K yielded ZrFe2 and Zr3Fe. At the elevated temperature of 773 K, each alloy disproportionated very fast, within several tens of seconds, to ZrH2 and Zr-deficient alloys such as ZrCo, ZrNi and ZrFe2 for Zr2Co, Zr2Ni and Zr2Fe, respectively. ZrCo and ZrNi further disproportionated to ZrCo2 and Zr7Ni10 at this temperature, but the rates were very slow. These observations showed that the stability to hydrogen induced disproportionation is in the order of Zr2Ni>Zr2Co>Zr2Fe. This order is also valid for the ease of reproportionation, although the behavior of Zr2Fe was completely different from the others. (C) 2002 Elsevier Science B.V. All rights reserved.

  DOI：

  10.1016/s0925-8388(02)01169-6

文献信息

• Solid solutions in Zr–Zn–{Fe, Co, Ni} ternary systems at 600°C
  作者：O.V Dolotko、G.S Dmytriv、V.V Pavlyuk

  DOI：10.1016/s0925-8388(02)00923-4

  日期：2003.2

  Abstract Investigations of the solid solutions in Zr–Zn–Fe, Co, Ni} ternary systems at 600 °C are presented. Crystal structures of the solid solutions based on the binary compounds ZrNi 5 , Zr 7 Ni 10 , ZrNi, Zr 2 Ni, ZrCo, Zr 2 Co, ZrFe 2 , ZrZn 2 and Zr 2 Zn were investigated by X-ray powder diffraction.

  摘要 介绍了在 600 °C 下 Zr-Zn-Fe, Co, Ni} 三元系统中固溶体的研究。通过X射线粉末衍射研究了基于二元化合物ZrNi 5 、Zr 7 Ni 10 、ZrNi、Zr 2 Ni、ZrCo、Zr 2 Co、ZrFe 2 、ZrZn 2 和Zr 2 Zn的固溶体的晶体结构。
• Anomalous Thermal Expansion in a CuAl₂-type Superconductor CoZr₂
  作者：Yoshikazu Mizuguchi、Md. Riad Kasem、Yoichi Ikeda

  DOI：10.7566/jpsj.91.103601

  日期：2022.10.15

  (Tr: transition metal) over a wide temperature range. We performed neutron powder diffraction and X-ray powder diffraction on CoZr2 and observed remarkably anisotropic thermal expansion with a c-axis negative thermal expansion constant of αc < −15 µK−1 over a wide temperature range of T = 50–573 K. With decreasing temperature, lattice constant a decreased, whereas lattice constant c continuously increased

  我们研究了CuAl 2型超导体CoZr 2和Tr Zr 2 ( Tr：过渡金属)的合金化合物在很宽的温度范围内的异常热膨胀。我们对 CoZr 2进行了中子粉末衍射和 X 射线粉末衍射，并在T = 50–573 K的宽温度范围内观察到显着的各向异性热膨胀，c轴负热膨胀常数为α c < -15 µK -1 . 随着温度的降低，晶格常数a减小，而晶格常数cCoZr 2不断增加。冷却过程中a轴/ c轴各向异性收缩/膨胀的原因可以通过Co-Zr键的微小变化和Zr-Co-Zr角的系统性减小来解释。在合金系统(Fe,Co,Ni)Zr 2和(Fe,Co,Ni,Rh,Ir)Zr 2中观察到类似的热膨胀，这表明这种现象是Tr Zr 2系统的共同特征。我们建议通过优化Tr Zr 2中a轴和c轴的对比热膨胀可以实现零热膨胀金属。
• Tetragonal Zr2CoD5 with filled Al2Cu-type structure and ordered deuterium distribution
  作者：F. Bonhomme、K. Yvon、M. Zolliker

  DOI：10.1016/0925-8388(93)90438-s

  日期：1993.9

  Tetragonal Zr 2 CoD 5 (measured composition, Zr 2 CoD 4.82(1) ; space group symmetry P4/ncc; a= 6.9251(5) A , c= 5.6462(6) A ; T= 298 K ; Z= 4 ; refined composition Zr 2 CoD 5.05(2) ) was synthesized from intermetallic Zr 2 Co (Al 2 Cu-type structure; space group symmetry I4/mcm; a = 6.3642(4) A , c = 5.5204(3) A ) by reaction with deuterium at 398 K and 15 bar pressure. Neutron powder diffraction shows that

  摘要 四方晶Zr 2 CoD 5 (实测成分, Zr 2 CoD 4.82(1) ;空间群对称性P4/ncc; a= 6.9251(5) A , c= 5.6462(6) A ; T= 298 K ; Z= 4 ;精细成分 Zr 2 CoD 5.05(2) ) 由金属间化合物 Zr 2 Co（Al 2 Cu 型结构；空间群对称性 I4/mcm；a = 6.3642(4) A , c = 5.5204(3) A ) 通过反应合成在 398 K 和 15 bar 压力下使用氘。中子粉末衍射表明氘以有序的方式填充四面体[Zr 4 ]和[Zr 3 Co]间隙。钴被氘包围，呈近似方形平面结构，CoD键距为1.663(2) A。最短的ZrD键和DD接触距离分别为2.044(1) A和2.092(1) A . 该化合物在 773 K 和 1 bar H 2 压力下分解为 ZrH 2 和 ZrCo 2
• Nuclear-magnetic-resonance investigation of the itinerant nearly antiferromagnetic behavior in superconducting<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Zr</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mo>(</mml:mo><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Co</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mi>−</mml:mi><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ni</mml:mi></mml:mrow><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mo>)</mml:mo></mml:math>
  作者：M. Takekuni、H. Sugita、S. Wada

  DOI：10.1103/physrevb.58.11698

  日期：——

  Nuclear magnetic resonance of 59Co in superconducting Zr-2(Co1-xNix) compounds was carried out at 75 MHz in a temperature range between 1.4 and 260 K to study the properties of the low-frequency spin dynamics. A temperature-independent Knight shift and an approximate Curie Weiss behavior of the nuclear spin-lattice relaxation rate are well explained within a framework of the self-consistent renormalization theory of spin fluctuations for nearly antiferromagnetic (AF) metals. Results of the Ni substitution for Co indicate that the superconducting transition temperature relates more to the spin density fluctuations around q = Q (Q being an AF wave vector) than to the density of states at the Fermi level. [S0163-1829(98)09941-X].
• Substitute effects of Ga on <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si35.gif" display="inline" overflow="scroll"><mml:msub><mml:mrow><mml:mi>T</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow></mml:msub></mml:math> in superconducting Zr2(Co1−Ga )
  作者：K.J. Syu、C.H. Wu、S.C. Chen、W.H. Lee

  DOI：10.1016/j.ssc.2010.12.005

  日期：2011.3

  As revealed in the powder X-ray diffraction and crystallographic data, the body-centered tetragonal structure of the parent compound Zr2Co is retained in Zr-2(Co1-xGax) up to the solubility limit near x = 0.3. Variation of room temperature lattice parameters indicates that parameter a increases linearly with increasing x up to x = 0.2 then saturates while c and c/a values decrease linearly with x up to x = 0.3 due to doping with Ga. A prominent maximum in the unit cell volume v versus x curve therefore appears around x = 0.2. Magnetic and electrical measurements show that there is an explicit maximum T-c close to x = 0.05. This demonstrates that the superconducting transition temperature of the pseudo-binary system Zr-2(Co1-xGax) is not a monotonic function of the lattice constants a, c, c/a, or e. As compared with the Zr-2(Co1-xNix) system, it is suggested that the superconducting transition temperature in Zr-2(Co1-xGax) may relate more to the spin density fluctuations than to the density of states at the Fermi level. (C) 2010 Elsevier Ltd. All rights reserved.