Subsolidus phase relations and crystal structures of R-Ca-Cu-O (R = Nd, Sm, Gd, Tm) systems

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	Subsolidus phase relations and crystal structures of R-Ca-Cu-O (R = Nd, Sm, Gd, Tm) systems
	C. Q. Han; G. B. Song; X. L. Chen; J. K. Liang; G. H. Rao
	2003
发表期刊	Journal of Solid State Chemistry
ISSN	0022-4596
卷号	173 期号:1 页码:164-171
摘要	The subsolidus phase relations of R2O3-CaO-CuO ternary systems (R = Nd, Sm, Gd, Tm) have been investigated by X-ray powder diffraction. All samples were synthesized at about 950degrees in air. There exists a ternary compound Ca14-xRxCu24O41 (x = 4 for R = Nd, Gd and x = 5 for R = Sm) and a ternary solid solution Ca2+xR2-xCu5O10 (R = Nd, Sm, Gd, Tm) with a wide composition range Deltax of about 0.6. The compound Ca14-xRxCu24O41 possesses a layered orthorhombic structure and is isostructural to Sr14-xCaxCu24O41. The lattice parameters a and c of the compound are basically independent of the ionic radius of R, while the lattice parameter b and unit-cell volume V decrease substantially with the decrease of the ionic radii of R. The Ca2+xR2-xCu5O10 solid solution is isostructural to Ca2+xY2-xCu5O10, the structure of which is based on an orthorhombic "NaCuO2-type" subcell containing infinite one-dimensional chains of edge-shared square planar cuprate groups crosslinked by the layered cations Ca and R that locate in the inter-chain tunnels. (C) 2002 Elsevier Science (USA). All rights reserved.
部门归属	chinese acad sci, inst phys, ctr condensed matter phys, beijing 100080, peoples r china. sw univ sci & technol, inst mineral mat & applicat, mianyang 621002, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;liang, jk (reprint author), chinese acad sci, inst phys, ctr condensed matter phys, pob 603, beijing 100080, peoples r china
关键词	R2o3-cao-cuo (r = Nd Ca10r4cu24o41 (r = Nd ca2+xr2-xcu5o10 (r = Nd Gd Sm Phase Relations Sm Sm Tm) Structure Gd Gd) Structure Tm) Systems Ternary-system Approximately 950-degrees-c High-pressure Superconductivity Diagram Air Er Compatibilities Property Oxide
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WOS记录号	WOS:000183489700022
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/35842
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	C. Q. Han,G. B. Song,X. L. Chen,et al. Subsolidus phase relations and crystal structures of R-Ca-Cu-O (R = Nd, Sm, Gd, Tm) systems[J]. Journal of Solid State Chemistry,2003,173(1):164-171.
APA	C. Q. Han,G. B. Song,X. L. Chen,J. K. Liang,&G. H. Rao.(2003).Subsolidus phase relations and crystal structures of R-Ca-Cu-O (R = Nd, Sm, Gd, Tm) systems.Journal of Solid State Chemistry,173(1),164-171.
MLA	C. Q. Han,et al."Subsolidus phase relations and crystal structures of R-Ca-Cu-O (R = Nd, Sm, Gd, Tm) systems".Journal of Solid State Chemistry 173.1(2003):164-171.