Negative thermal expansion in one-dimension of a new double sulfate AgHo(SO4)2 with isolated SO4 tetrahedra

Yuriy G.Denisenko ¹Victor V.Atuchin ²Maxim S.Molokeev ³Naizheng Wang ⁴Xingxing Jiang ⁴Aleksandr S.Aleksandrovsky ⁵Alexander S.Krylov ⁶Aleksandr S.Oreshonkov ⁷Alexander E.Sedykh ⁸Svetlana S.Volkova ⁹Zheshuai Lin ¹⁰Oleg V.Andreev ¹¹Klaus Müller-Buschbaum⁸

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作者信息

1. Institute of Chemistry,Tyumen State University,Tyumen,625003,Russia;Institute of Inorganic and Analytical Chemistry,Justus-Liebig-University of Giessen,35392,Giessen,Germany;Department of General and Special Chemistry,Industrial University of Tyumen,Tyumen,625000,Russia
2. Laboratory of Optical Materials and Structures,Institute of Semiconductor Physics,SB RAS,Novosibirsk,630090,Russia;Laboratory of Semiconductor and Dielectric Materials,Novosibirsk State University,Novosibirsk,630090,Russia;Research and Development Department,Kemerovo State University,Kemerovo,650000,Russia
3. Laboratory of Crystal Physics,Kirensky Institute of Physics,Federal Research Center KSC SB RAS,Krasnoyarsk,660036,Russia;Siberian Federal University,Krasnoyarsk,660041,Russia;Department of Physics,Far Eastern State Transport University,Khabarovsk,680021,Russia
4. Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing,100190,China
5. Laboratory of Coherent Optics,Kirensky Institute of Physics,Federal Research Center KSC SB RAS,Krasnoyarsk,660036,Russia;Institute of Nanotechnology,Spectroscopy and Quantum Chemistry,Siberian Federal University,Krasnoyarsk,660041,Russia
6. Laboratory of Molecular Spectroscopy,Kirensky Institute of Physics,Federal Research Center KSC SB RAS,Krasnoyarsk,660036,Russia
7. Siberian Federal University,Krasnoyarsk,660041,Russia;Laboratory of Molecular Spectroscopy,Kirensky Institute of Physics,Federal Research Center KSC SB RAS,Krasnoyarsk,660036,Russia
8. Institute of Inorganic and Analytical Chemistry,Justus-Liebig-University of Giessen,35392,Giessen,Germany;Center for Materials Research(LaMa),Justus-Liebig-University Giessen,Giessen,35392,Germany
9. Institute of Chemistry,Tyumen State University,Tyumen,625003,Russia
10. Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing,100190,China;University of the Chinese Academy of Sciences,Beijing,100049,China
11. Institute of Chemistry,Tyumen State University,Tyumen,625003,Russia;Laboratory of the Chemistry of Rare Earth Compounds,Institute of Solid State Chemistry,UB RAS,Ekaterinburg,620137,Russia
折叠

Abstract

A double holmium-silver sulfate was obtained for the first time.The temperature intervals for the for-mation and stability of the compound were determined by differential scanning calorimetry.The crystal structure of AgHo(SO4)2 was determined by Rietveld method.The X-ray diffraction(XRD)analysis showed that the compound crystallizes in the monoclinic syngony,space group P21/m,with the unit cell param-eters a=4.71751(4)Å,b=6.84940(6)Å and c=9.89528(9)Å,β=95.1466(4)°,V=318.448(5)Å3,Z=2,RB=1.55％,T=303K.Two types of sulfate tetrahedra were found in the structure,which significantly affected the spectral properties in the infrared range.In the temperature range of 143-703 K,a negative thermal expansion along the b direction accompanied by a positive thermal expansion along the a and c directions was observed.It was established that negative thermal expansion is the result of the deforma-tion of sulfate tetrahedra,which is affected by the movement of holmium and silver atoms.The excitation in the blue spectral range(457.9 nm)produces a luminescence in light blue(489 nm),green(545 nm)and red(654 nm)spectral ranges,and the latter two were of comparable intensity that is favorable for WLED sources.The observed luminescent band distribution is ascribed to the specific crystal field at Ho3+ion sites rather than a variation of radiationless probability.

Key words

Sulfate/Crystal structure/Thermal expansion/Raman/Photoluminescence/Band structure

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基金项目

出版年

2021

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI

影响因子：0.657

ISSN：1005-0302

参考文献量55

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