La4(Si5.2Ge2.8O18)(TeO3)4 and La2(Si6O13)(TeO3)2: Intergrowth of the lanthanum(III) tellurite layer with the XO4 (X=Si/Ge) tetrahedral layer
La4(Si5.2Ge2.8O18)(TeO3)4 and La2(Si6O13)(TeO3)2: Intergrowth of the lanthanum(III) tellurite layer with the XO4 (X=Si/Ge) tetrahedral layer
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La4(Si5.2Ge2.8O18)(TeO3)4 和 La2(Si6O13)(TeO3)2:亚碲酸镧 (III) 层与 XO4 (X=Si/Ge) 四面体层的共生
DOI:
10.1016/j.jssc.2007.11.031
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发表时间:
2008-02
影响因子:
3.3
通讯作者:
中科院分区:
文献类型:
--
作者:
Two novel lanthanum(III) silicate tellurites, namely, La{sub 4}(Si{sub 5.2}Ge{sub 2.8}O{sub 18})(TeO{sub 3}){sub 4} and La{sub 2}(Si{sub 6}O{sub 13})(TeO{sub 3}){sub 2}, have been synthesized by the solid state reactions and their structures determined by single crystal X-ray diffraction. The structure of La{sub 4}(Si{sub 5.2}Ge{sub 2.8}O{sub 18})(TeO{sub 3}){sub 4} features a three-dimensional (3D) network composed of the [(Ge{sub 2.82}Si{sub 5.18})O{sub 18}]{sup 4-} tetrahedral layers and the [La{sub 4}(TeO{sub 3}){sub 4}]{sup 4+} layers that alternate along the b-axis. The germanate-silicate layer consists of corner-sharing XO{sub 4} (X=Si/Ge) tetrahedra, forming four- and six-member rings. The structure of La{sub 2}(Si{sub 6}O{sub 13})(TeO{sub 3}){sub 2} is a 3D network composed of the [Si{sub 6}O{sub 13}]{sup 2-} double layers and the [La{sub 2}(TeO{sub 3}){sub 2}]{sup 2+} layers that alternate along the a-axis. The [Si{sub 6}O{sub 13}]{sup 2-} double layer is built by corner-sharing silicate tetrahedra, forming four-, five- and eight-member rings. The TeO{sub 3}{sup 2-} anions in both compounds are only involved in the coordination with La{sup 3+} ions to form a lanthanum(III) tellurite layer. La{sub 4}(Si{sub 5.2}Ge{sub 2.8}O{sub 18})(TeO{sub 3}){sub 4} is a wide band-gap semiconductor. - Graphical abstract: The first lanthanum(III) silicate/germanate tellurites, namely, La{sub 4}[(Si{sub x}Ge{sub 8-x})O{sub 18}](TeO{sub 3}){sub 4} (x=5.18) and La{sub 2}(Si{sub 6}O{sub 13})(TeO{sub 3}){sub 2}, have been synthesized and structurally determined by single crystal X-ray diffraction. Both compounds feature complicated 3D network structures composed of the silicate/germanate tetrahedral layers alternating with the [LaTeO{sub 3}] layers.
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DOI:
10.1524/zkri.1977.145.16.321
发表时间:
1977
期刊:
--
影响因子:
--
作者:
H. Mayer;G. Pupp
通讯作者:
H. Mayer;G. Pupp
DOI:
10.1016/b978-0-12-523450-4.50005-5
发表时间:
1971
期刊:
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影响因子:
--
作者:
R. Nyquist;R. Kagel
通讯作者:
R. Nyquist;R. Kagel
DOI:
10.1016/s0167-2991(08)x6067-7
发表时间:
2001
期刊:
--
影响因子:
--
作者:
P. A. Jacobs;H. Bekkum;E. M. Flanigen;J. Jansen;H. Bekkum
通讯作者:
P. A. Jacobs;H. Bekkum;E. M. Flanigen;J. Jansen;H. Bekkum
DOI:
10.1016/0144-2449(92)90130-h
发表时间:
1992-07
期刊:
Zeolites
影响因子:
--
作者:
L. Rees
通讯作者:
L. Rees
影响因子:
5.4
作者:
M. Fleet;S. Muthupari
通讯作者:
M. Fleet;S. Muthupari