Sr(3)Co(2)O(4.33)h(0.84)：一种扩展的过渡金属氧化物-氢化物。

Sr(3)Co(2)O(4.33)h(0.84): an extended transition metal oxide-hydride.

机构信息

Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford, OX1 3QR, United Kingdom.

出版信息

Inorg Chem. 2010 Dec 6;49(23):11062-8. doi: 10.1021/ic101613b. Epub 2010 Oct 29.

DOI:10.1021/ic101613b

PMID:21033678

Abstract

Reaction of the n = 2 Ruddlesden-Popper oxide Sr(3)Co(2)O(5.80) with CaH(2) yields an extended oxide-hydride phase: Sr(3)Co(2)O(4.33)H(0.84). Neutron powder diffraction data reveal the material adopts a body-centered orthorhombic structure (Immm: a = 3.7551(5) Å, b = 3.7048(4) Å, c = 21.480(3) Å) in which the hydride ions are accommodated within disordered CoO(1.16)H(0.46) layers. Low temperature neutron powder diffraction data show no evidence for long-range magnetic order, suggesting the chemical disorder in the anion lattice of the material leads to magnetic frustration.

摘要

n=2 层状钙钛矿氧化物 Sr(3)Co(2)O(5.80) 与 CaH(2)反应生成扩展的氧化物-氢化物相：Sr(3)Co(2)O(4.33)H(0.84)。中子粉末衍射数据表明该材料采用体心正交结构（Immm：a=3.7551(5) Å，b=3.7048(4) Å，c=21.480(3) Å），其中氢化物离子被容纳在无序的 CoO(1.16)H(0.46)层中。低温中子粉末衍射数据表明没有长程磁有序的证据，这表明材料的阴离子晶格中的化学无序导致了磁阻挫。