Phase relations around langasite (La3Ga5SiO14) in the system La2O3-Ga2O3-SiO2 in air
Phase relations around langasite (La3Ga5SiO14) in the system La2O3-Ga2O3-SiO2 in air
复制标题
DOI：
10.1016/s0022-0248(02)02489-2
复制
发表时间：
2003-04-01
影响因子：
1.8
通讯作者：
Uda, S
中科院分区：
文献类型：
--
作者：
Wang, SQ;Uda, S
根据La（2）O（3）-Ga（2）O（3）-SiO（2）三元体系中不同成分样品在煅烧和晶化过程中的相组合，研究了硅酸镧镓石（LGS，La（3）Ga（5）SiO]（4））周围的相关系。首次发现具有磷灰石结构的三元化合物La（14）Ga（x）Si（9-x）O（39-x/2）。在化学计量比LGS和LGS单晶的熔融样品的冷却过程中观察到该化合物的结晶，证明LGS是一种不一致的熔融化合物。主要根据冷却过程中的结晶顺序建立了相图。(C)2003 Elsevier Science B. V.保留所有权利。
Phase relations around langasite (LGS, La(3)Ga(5)SiO](4)) were studied on the basis of phase assemblage observed during calcination and crystallization process of samples of various compositions in the ternary system La(2)O(3)-Ga(2)O(3)-SiO(2). A ternary compound of apatite structure, La(14)Ga(x)Si(9-x)O(39-x/2) was found for the first time. Crystallization of this compound was observed in the cooling process of molten samples of stoichiometric LGS as well as LGS single crystal, demonstrating that LGS is an incongruent-melting compound. A phase diagram was established primarily based on the crystallization sequence in the cooling process. (C) 2003 Elsevier Science B.V. All rights reserved.