首页> 外文期刊>International Journal of Quantum Chemistry >High-pressure synthesis and single-crystal structure refinement of gadolinium holmium silicate hydroxyapatite Gd4.33Ho4.33(SiO4)(6)(OH)(2)
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High-pressure synthesis and single-crystal structure refinement of gadolinium holmium silicate hydroxyapatite Gd4.33Ho4.33(SiO4)(6)(OH)(2)

机译:silicate硅酸羟基磷灰石Gd4.33Ho4.33(SiO4)(6)(OH)(2)的高压合成和单晶结构细化

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Single crystals of gadolinium holmium silicate hydroxyapatite Gd4.33Ho4.33(SiO4)(6)(OH)(2) have been synthesized at 2.0 GPa and 1450 degrees C using a piston-cylinder-type high-pressure apparatus. The crystal symmetry by single-crystal X-ray diffraction analysis is hexagonal, space group P6(3)/m (No. 176), with a = 9.3142(5) angstrom, C = 6.7010(4) angstrom, Z = 1. Gadolinium and Ho are disordered over the two large cation positions, A(1) and A(2), and charge balance in this silicate apatite is maintained by cation vacancies in A(l). Two other apatite-structure crystals investigated have P (3) over bar and Imma symmetry, and represent either partially ordered Gd-Ho distributions or crystal strain induced during quenching. (C) 2006 Elsevier Inc. All rights reserved.
机译:使用活塞缸式高压装置在2.0 GPa和1450摄氏度下合成了linlin硅酸hol羟基磷灰石Gd4.33Ho4.33(SiO4)(6)(OH)(2)。通过单晶X射线衍射分析得出的晶体对称性为六边形,空间群P6(3)/ m(编号176),a = 9.3142(5)埃,C = 6.7010(4)埃,Z = 1。 A和Ho在两个较大的阳离子位置A(1)和A(2)上无序,并且该硅酸盐磷灰石中的电荷平衡通过A(1)中的阳离子空位得以维持。研究的其他两种磷灰石结构晶体在bar和Imma对称性上具有P(3),并且代表部分有序的Gd-Ho分布或淬灭过程中引起的晶体应变。 (C)2006 Elsevier Inc.保留所有权利。

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