Na4SeO5, ein neues Pentaoxoselenat(VI) – Synthese,Charakterisierung und Vergleich mit isotypem Na4MoO5 |
| |
Authors: | H. Haas M. Jansen |
| |
Abstract: | Na4SeO5, a Novel Pentaoxoselenate(VI) – Synthesis, Charakterisation, and Comparison with Na4MoO5 Na4SeO5 was prepared by high pressure solid state reaction at 500 °C and at a hydrostatic pressure of 2.5 Gpa from a mixture of Na2O and Na2SeO4 in silver crucibles and Na4MoO5 by solid state reaction at 450 °C from a mixture of Na2O and MoO3. The crystal structures of both new compounds were solved and refined using X‐ray powder methods (Profilematching Na4SeO5: P1, a = 988.3(1), b = 988.4(1), c = 558.6(1) pm, α = 96.25(1)°, β = 96.24(1)°, γ = 113.41(1)°, Rp = 0.0783, Rwp = 0.1037. Profilematching Na4MoO5: P1, a = 999.5(1), b = 1002.0(1), c = 565.1(1) pm, α = 96.54(1)°, β = 96.29(1)°, γ = 113.35(1)°, Rp = 0.0623, Rwp = 0.0867). Both compounds contain novel XO54– anions of approximately tetragonal pyramidal shape. The crystal structures are consistent with spectroscopic data (IR, Raman). |
| |
Keywords: | Sodiumorthoselenate Molybdenium Selenium Crystal structure IR‐, Ramanspectra |
|
|