Synthesis, crystal structure, and anisotropic thermal expansion of Dy_(4.67)(SiO_4)_3O

S.T. Misture; S.P. Harvey; R.T. Francy

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Synthesis, crystal structure, and anisotropic thermal expansion of Dy_(4.67)(SiO_4)_3O

机译：Dy_（4.67）（SiO_4）_3O的合成，晶体结构和各向异性热膨胀

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A new phase in the Dy-Si-O system, Dy_(4.67)(SiO_4)_3O, was prepared in powder form using the mixed oxide method. Dy_(4.67)(SiO_4)_3O was first observed at 1300 deg C, and phase purity was achieved after 96 h at 1600 deg C. The crystal structure was determined using single crystal diffraction using synchrotron radiation, and powder x-ray diffraction data was refined using the Rietveld method. The structure was found to be apatite-type, hexagonal, with space group P6_(3/m) and a = b = 0.93883(2) nm, c = 0.67820(1) nm, Z = 2. High-temperature x-ray powder diffraction was used to characterize the anisotropic thermal expansion over the temperature range of 24-1450 deg C, providing the axial and cell volume expansion.

机译：用混合氧化物法以粉末形式制备了Dy-Si-O系统中的新相Dy_（4.67）（SiO_4）_3O。首先在1300℃观察到Dy_（4.67）（SiO_4）_3O，并在1600℃96小时后达到相纯度。使用同步辐射通过单晶衍射确定晶体结构，粉末X射线衍射数据为使用Rietveld方法精制而成。发现该结构为磷灰石型六边形，空间群为P6_（3 / m），a = b = 0.93883（2）nm，c = 0.67820（1）nm，Z =2。高温x射线粉末衍射被用来表征在24至1450摄氏度温度范围内的各向异性热膨胀，从而提供轴向和晶胞体积膨胀。

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《Journal of Materials Research》 |2004年第8期|p.2330-2335|共6页
作者
S.T. Misture; S.P. Harvey; R.T. Francy;
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NYS College of Ceramics at Alfred University, Alfred, New York 14802;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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正文语种 eng
中图分类工程材料学;
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Synthesis, crystal structure, and anisotropic thermal expansion of Dy_(4.67)(SiO_4)_3O

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