Synthesis, Crystal Structure, and Physical Properties of Two Polymorphs of CsGaSe2, and High-Temperature X-ray Diffraction Study of the Phase Transition Kinetics
Synthesis, Crystal Structure, and Physical Properties of Two Polymorphs of CsGaSe2, and High-Temperature X-ray Diffraction Study of the Phase Transition Kinetics
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两种CsGaSe2多晶型物的合成、晶体结构和物理性质以及相变动力学的高温X射线衍射研究
DOI:
10.1021/acs.cgd.6b00532
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发表时间:
2016
影响因子:
3.8
通讯作者:
A. Pfitzner
中科院分区:
文献类型:
--
作者:
D. Friedrich;M. Schlosser;A. Pfitzner
The light gray selenogallate CsGaSe2-mC64 was obtained by reaction of stoichiometric amounts of CsN3, GaSe, and Se at elevated temperatures. Its crystal structure was determined by single-crystal X-ray diffraction. The compound crystallizes in the monoclinic space groupC2/c(No. 15) witha= 11.043(2) Å,b= 11.015(4) Å,c= 16.810(2) Å, β = 99.49(1) °,V= 2016.7(8) Å3, andZ= 16 (powder data, ambient temperature). Its crystal structure features anionic layers∞2[Ga4Se84–] consisting of corner-sharing Ga4Se10supertetrahedra. The compound undergoes a first-order phase transition at temperatures of 610 ± 10 °C. The high-temperature phase CsGaSe2-mC16 also crystallizes in the monoclinic space groupC2/c(No. 15) witha= 7.651(3) Å,b= 12.552(4) Å,c= 6.170(3) Å, β = 113.62(4)°,V= 542.9(5) Å3, andZ= 4 (powder data, ambient temperature). The crystal structure of the high-temperature phase consists of SiS2analogous chains∞1[GaSe2–].In situhigh-temperature X-ray diffraction experiments were performed to study this phase transition. The crystallization kinetics of the phase transitions were studied using Johnson–Mehl–Avrami–Kolmogorov (JMAK) theory for isothermal crystallization processes. The activation energy of the phase transition was determined using the Arrhenius equation. Furthermore, the compound was studied by vibrational and diffuse reflectance spectroscopy.
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影响因子:
--
作者:
B. Krebs
通讯作者:
B. Krebs
DOI:
10.1002/zaac.201400567
发表时间:
2015
期刊:
Zeitschrift für anorganische und allgemeine Chemie
影响因子:
--
作者:
V. Winkler;M. Schlosser;A. Pfitzner
通讯作者:
A. Pfitzner
DOI:
10.1002/zaac.201400046
发表时间:
2014-04
期刊:
Zeitschrift für anorganische und allgemeine Chemie
影响因子:
--
作者:
D. Friedrich;M. Schlosser;A. Pfitzner
通讯作者:
D. Friedrich;M. Schlosser;A. Pfitzner
DOI:
--
发表时间:
2018
期刊:
影响因子:
--
作者:
岡田正康;米岡有一郎;大石誠;藤井幸彦
通讯作者:
藤井幸彦
DOI:
10.1515/znb-1974-1-237
发表时间:
1974
期刊:
Zeitschrift für Naturforschung B
影响因子:
--
作者:
D. Müller;F. E. Poltmann;H. Hahn
通讯作者:
H. Hahn