Abstract
The structure of a series strontium vanadate glasses is studied by x-ray and neutron diffraction experiments. A decrease of the total V–O coordination number from 4·3±0·2 (10 mol% SrO) to 4·0±0·2 (50 mol% SrO) is observed which is interpreted as a transition from networks formed of VO5 and VO4 units to structures formed of only VO4 tetrahedra. The total V–O coordination number seems to be constant up to 30 mol% SrO and it decreases beyond this stoichiometry. The V–O distance peak is highly asymmetric and needs approximation by two or three Gaussian functions. The total Sr–O coordination number is about 8 also with asymmetric Sr–O distance peaks composed by two Gaussian functions. The V–V distances decrease from 0·344 nm (10 mol% SrO) to 0·337 nm in Sr vanadate glasses of 50 mol% SrO.
| Original language | English |
|---|---|
| Pages (from-to) | 200-205 |
| Number of pages | 6 |
| Journal | Physics and Chemistry of Glasses: European Journal of Glass Science and Technology Part B |
| Volume | 61 |
| Issue number | 5 |
| DOIs | |
| State | Published - Nov 2020 |
| Externally published | Yes |
Funding
Financial support of the Deutsche Forschungs– Financial support of the Deutsche Forschungsgemeinschaft (contract KR 1372/7-1) is gratefully acknowledged. gemeinschaft (contract KR 1372/7-1) is gratefully acknowledged.