Structure of the compounds La3AlGe5O16, La3GaGe5O16 and Ce3GaGe5O16
Abstract
Hydrothermal synthesis in the systems LaCl3 (CeCl3)–Al(OH)3 (Ga2O3)–GeO2 yielded crystals of composition La3AlGe5O16, La3GaGe5O16 and Ce3GaGe5O16, 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 P[unk] with the pseudosymmetry P21/c. All compounds are isostructural. The lattice parameters are a = 4.794(4) Å, b = 8.102(8) Å, c = 15.722(8) Å, α = 90.42(3)°, β = 94.46(2)°, γ = 89.91(2)° for La3AlGe5O16, a = 4.827(4) Å, b = 8.090(4) Å, c = 15.707(6) Å, α = 90.76(5)°, β = 94.01(7)°, γ = 90.01(7)° for La3GaGe5O16 and a = 4.768(7) Å, b = 8.088(5) Å, c = 15.600(2) Å, α = 90.55(4)°, β = 94.46(4)°, γ = 89.63(4)° for Ce3AlGe5O16. There are two formula units in the unit cell.
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Artikel in diesem Heft
- The functional dependence of the coordinates of atoms on form and structure factors
- Analysis of environment of alkali atoms in oxygen-containing compounds with Voronoi-Dirichlet polyhedra
- Thermal expansion of CuMoO4 below room temperature
- Structures of bis(fluorosulfonyl)imide HN(SO2F)2, bis(trifluoromethylsulfonyl)imide HN(SO2CF3)2, and their potassium salts at 150 K
- Structure of the compounds La3AlGe5O16, La3GaGe5O16 and Ce3GaGe5O16
- Disorder of Cu+ in Cu3SbS3: structural investigations of the high- and low-temperature modification
- Tieftemperatur-Kristallstruktur von Dichlormonoxid, Cl2O
- The crystal structure of new lead monoborate hydrate, Pb5B3O8(OH)3H2O
- Different structures for two very similar 2-benzoylpyridine azacyclothiosemicarbazones
- The crystal structure of diaquabis(2,4-dinitrophenolato)cobalt(II) tetrahydrate
