Syntheses, crystal structures and properties of new lead(ii) or bismuth(iii) selenites and tellurite
作者:Su-Yun Zhang、Chun-Li Hu、Pei-Xin Li、Hai-Long Jiang、Jiang-Gao Mao
DOI:10.1039/c2dt30560g
日期:——
Four new lead(II) or bismuth(III) selenites and a tellurite, namely, Pb3(TeO3)Cl4, Pb3(SeO3)2Br2, Pb2Cd3(SeO3)4I2(H2O), Pb2Ge(SeO3)4 and BiFe(SeO3)3, have been prepared and structurally characterized by single crystal X-ray diffraction (XRD) analyses. These compounds exhibit five different types of structures. The structure of Pb3(TeO3)Cl4 features a three-dimensional (3D) lead(II) chloride network
四种新的铅(II)或铋(III)亚硒酸盐和亚碲酸盐,即Pb 3(TeO 3)Cl 4,Pb 3(SeO 3)2 Br 2,Pb 2 Cd 3(SeO 3)4 I 2(H 2 O),Pb 2 Ge(SeO 3)4和BiFe(SeO 3)3已经通过单晶X射线衍射(XRD)分析制备了Al 2 O 3,并对其结构进行了表征。这些化合物表现出五种不同类型的结构。Pb 3(TeO 3)Cl 4的结构具有三维(3D)氯化铅(II)网络,其中碲酸盐阴离子填充在沿c轴的Pb 4 4元环(MRs)的1D隧道中。Pb 3(SeO 3)2 Br 2包含由Lead(II)组成的3D网络亚硒酸盐溴化物阴离子相互连接的有机层。Pb 2 Cd 3(SeO 3)4 I 2(H 2 O)是基于2D亚硒化镉(II)亚硒酸盐层的3D结构,该层进一步通过一维碘化铅(II)梯形链与晶格连接水分子位于结构的一维隧道中。Pb 2 Ge(SeO
Kinetic parameters of decomposition of some selenites
作者:L T Vlaev、V G Georgieva、S D Genieva
DOI:10.1007/s10973-005-6918-y
日期:2006.2
Studying the kinetics of isothermal decomposition of thirteen selenites at isothermal heating, the values of activation energy E of the process, pre-exponential factor A in Arrhenius equation and changes of entropy Δ S ≠ MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYfdmGievaebbnrfifHhDYfgasaacH8srps0lbbf9q8WrFfeuY=Hhbbf9v8qqaqFr0xc
Synthesis of Lead Chalcogenide Nanocrystals by Sequential Ion Implantation in Silica
作者:R. Espiau de Lamaestre、J. Majimel、F. Jomard、H. Bernas
DOI:10.1021/jp0527047
日期:2005.10.1
Leadchalcogenide (PbS, PbSe, and PbTe) nanocrystals were synthesized by sequential implantation of Pb and one of the chalcogen species into pure silica. The implantation energy and fluence were chosen so that the implantation profiles practically overlap at a depth approximately 150 nm with a maximum concentration of about 0.3 atom %. Annealing for 1-8 h at 850-900 degrees C triggers nanocrystal growth
X-ray Photoelectron Spectroscopy of Selenates La2O2SeO4 and Pr2O2SeO4
作者:Yu. A. Teterin、K. I. Maslakov、D. O. Charkin、A. Yu. Teterin、S. N. Kalmykov、K. E. Ivanov、V. G. Petrov、O. I. Siidra
DOI:10.1134/s0036023621040239
日期:2021.4
PbSe6+O4, have been studied by X-ray photoelectronspectroscopy (XPS). The elemental and ionic compositions of new selenates containing Se6+, La3+, and Pr3+ ions have been confirmed on the basis of XPS parameters of the core and valence electrons. The reduction of Se6+ ions on the surface of selenite samples to Se4+ ions under X-ray radiation in the spectrometer chamber has been studied. It has been demonstrated
摘要 新硒酸盐的La 2 ö 2的SeO 4和Pr 2 ö 2的SeO 4,以及硒的PbSe 4+ ö 3和硒的PbSe 6+ Ò 4,已经研究了通过X射线光电子能谱(XPS)。根据核心和价电子的XPS参数,已经证实了含有Se 6+,La 3+和Pr 3+离子的新型硒酸盐的元素和离子组成。亚硒酸盐样品表面上的Se 6+离子还原为Se 4+已经研究了在光谱仪室中X射线辐射下的离子。已经证明,与硒酸PbSe 6+ O 4不同,PbSe 4+ O 3亚硒酸盐对X射线辐射稳定。已经表明,La 2 O 2 SeO 4在空气中比Pr 2 O 2 SeO 4更稳定。
Thermal and thermodynamic properties of the selenites of the elements from group IV in the periodic table
作者:G.G. Gospodinov、B.G. Bogdanov
DOI:10.1016/0040-6031(89)87072-8
日期:1989.6
Abstract The conditions necessary for the formation of basic lead selenites which result from the thermal dissociation of PbSeO 3 were investigated, as well as their thermodynamicproperties.