Phase relations in the MgO-Ga2O3-B2O3 system and the crystal structure of MgGaBO4

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	Phase relations in the MgO-Ga2O3-B2O3 system and the crystal structure of MgGaBO4
	Z. Yang; X. L. Chen; J. K. Liang; Y. C. Lan; T. Xu
	2001
发表期刊	Journal of Alloys and Compounds
ISSN	0925-8388
卷号	319 期号:1-2 页码:247-252
摘要	In this paper, the subsolidus phase relations of the ternary system MgO-Ga2O3-B2O3 were investigated. There are five binary compounds and one ternary compound. The ternary phase diagram consists of eight ternary phase regions. The ternary compound, GaMgBO4, is isostructural to Y2BeO4. It crystallizes in the orthorhombic system with the space group Pnam and lattice parameters a=9.1847(1) Angstrom, b=9.2942(1) Angstrom, c=3.0779(1) Angstrom, Z=4 and rho (cal.) = 4.267 g/cm(3). The Mg2+ and Ga3+ ions are distributed between the two cation sites: 77.8% Ga3+ and 22.2% Mg2+ occupy the cation site I, others (22.2% Ga3+ and 77.8% Mg2+) occupy the cation site II. In this structure the Mg2+ and Ga3+ ions are surrounded octahedrally by oxygen atoms, the berate ion is a single triangle (BO3). The most important feature of this structure is the way these octahedra are linked together by sharing edges to form ribbons, which are one octahedron thick and four octahedra wide in the ab plane and extend infinitely along the direction of the c axis. The XRD results show no phase transition occurs between -173 degreesC and 227 degreesC. The lattice parameters and the volume expansion coefficient were calculated. (C) 2001 Elsevier Science B.V. Al rights reserved.
部门归属	acad sinica, inst phys, beijing 100080, peoples r china. acad sinica, ctr condensed matter phys, beijing 100080, peoples r china. acad sinica, int ctr mat phys, shenyang 110015, peoples r china. yunnan normal univ, dept chem, kunming 650092, peoples r china.;chen, xl (reprint author), acad sinica, inst phys, pob 603, beijing 100080, peoples r china
关键词	Phase Relation Mgo-ga2o3-b2o3 System Gamgbo4 Crystal Structure X-ray Powder Diffraction Luminescence
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WOS记录号	WOS:000168204900040
引用统计	被引频次：17[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/321006/36872
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. Yang,X. L. Chen,J. K. Liang,et al. Phase relations in the MgO-Ga2O3-B2O3 system and the crystal structure of MgGaBO4[J]. Journal of Alloys and Compounds,2001,319(1-2):247-252.
APA	Z. Yang,X. L. Chen,J. K. Liang,Y. C. Lan,&T. Xu.(2001).Phase relations in the MgO-Ga2O3-B2O3 system and the crystal structure of MgGaBO4.Journal of Alloys and Compounds,319(1-2),247-252.
MLA	Z. Yang,et al."Phase relations in the MgO-Ga2O3-B2O3 system and the crystal structure of MgGaBO4".Journal of Alloys and Compounds 319.1-2(2001):247-252.