guest ::
| Home > Publications database > Compressibility, microcalorimetry, elastic properties and EELS of rhenium borides |
| Home > Publications database > Compressibility, microcalorimetry, elastic properties and EELS of rhenium borides |
| Journal Article | PUBDB-2018-02406 |
; ; ; ; ; ; ; ; ; ;
2018
Elsevier
Amsterdam [u.a.]
This record in other databases: 
Please use a persistent id in citations: doi:10.1016/j.solidstatesciences.2018.02.016
Abstract: Based on synchrotron X-ray diffraction on phase-pure samples, we revised the bulk moduli of the rhenium borides Re$_7$B$_3$ (B$_0$(Re$_7$B$_3$) = 391(5) GPa) and orthorhombic Re$_3$B (B$_0$ (orthorhombic Re$_3$B) = 393(4) GPa) and determined the bulk modulus of monoclinic Re$_3$B (B$_0$ (monoclinic Re$_3$B) = 390(3) GPa). These results agree well with the DFT calculations on the elastic properties. Microcalorimetry was employed to obtain thermodynamic data for Re$_7$B$_3$ and orthorhombic Re$_3$B and we determined C $_P$ , $_298$ (Re$_7$B$_3$) = 210(4) J/mol, $\Delta H^0_{298}$ (Re$_7$B$_3$) = 40558(400) J/mol, $S^{0}_{298}$(Re$_7$B$_3$) = 267(2) J/mol K and $\Theta_{D,298}$ (Re$_7$B$_3$) = 320(2) K, as well as $C_{p,298}$(Re$_3$B) = 86(1) J/mol, $\Delta H^0_{298}$(Re$_3$B) = 16950(170) J/mol, $\Theta_{D,298}$(Re$_3$B) = 112(1) J/mol K and (Re$_3$B) = 329(3) K. Hardness measurements were performed for Re$_7$B$_3$, which gave a Vickers hardness $H_V$(5 kgf) = 14.5(4) GPa and $H_V$(10 kgf) = 14.1(3) GPa. Electron energy loss spectroscopy (EELS) was performed on orthorhombic Re$_3$B and ReB$_2$, and the experimental spectra are well reproduced by theory in terms of their absorption edges.
|
The record appears in these collections: |
PDF
PDF (PDFA)