Structure of the compounds La3AlGe5O16, La3GaGe5O16 and Ce3GaGe5O16
Structure of the compounds La3AlGe5O16, La3GaGe5O16 and Ce3GaGe5O16
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DOI：
10.1524/zkri.1998.213.4.223
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发表时间：
1998
影响因子：
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通讯作者：
G. Adiwidjaja;M. Bröker;C. Claus;K. Friese;K. Klaska;O. Jarchow;M. Ruks;I. Woźniak
中科院分区：
文献类型：
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作者：
G. Adiwidjaja;M. Bröker;C. Claus;K. Friese;K. Klaska;O. Jarchow;M. Ruks;I. Woźniak
在LaCl 3（CeCl 3）-Al（OH）3（Ga 2 O3）-GeO 2体系中进行水热合成，分别得到La 3AlGe 5 O 16、La 3GaGe 5 O 16和Ce 3GaGe 5 O 16晶体.合成在1023 K-1073 K的温度和1000巴的压力下进行。三种物质的空间群均为P1，假对称性为P2 1 /c。所有化合物都是同构的。La 3AlGe 5 O 16的晶格常数为a = 4.794（4）A，B = 8.102（8）A，c = 15.722（8）A，α = 90.42（3）°，β = 94.46（2）°，γ = 89.91（2）°，a = 4.827（4）A，B = 8.090（4）A，c = 15.707（6）A，La3GaGe5O 16的α = 90.76（5），β = 94.01（7）°，γ = 90.01（7）°，α = 4.768（7）A，B = 8.088（5）A，c = 15.600（2）A，α = 90.55（4）°，β = 94.46（4）°，Ce 3AlGe 5 O 16的γ = 89.63（4）°。单位单元格中有两个公式单元。
Hydrothermal synthesis in the systems LaCl 3 (CeCl 3 )-Al(OH) 3 (Ga 2 O 3 )-GeO 2 yielded crystals of composition La 3 AlGe 5 O 16 , La 3 GaGe 5 O 16 and Ce 3 GaGe 5 O 16 , respectively. The syntheses were carried out at temperatures of 1023 K-1073 K under pressures of 1000 bar. The space group of the three substances was determined as P1 with the pseudosymmetry P2 1 /c. All compounds are isostructural. The lattice parameters are a = 4.794(4) A, b = 8.102(8) A, c = 15.722(8) A, α = 90.42(3)°, β = 94.46(2)°, γ = 89.91(2)° for La 3 AlGe 5 O 16 , a = 4.827(4) A, b = 8.090(4) A, c = 15.707(6) A, α = 90.76(5), β = 94.01(7)°, γ = 90.01(7)° for La 3 GaGe 5 O 16 and a = 4.768(7) A, b = 8.088(5) A, c = 15.600(2) A, α = 90.55(4)°, β = 94.46(4)°, γ = 89.63(4)° for Ce 3 AlGe 5 O 16 . There are two formula units in the unit cell.