1. Structure and equation of state of tetragonal boron subnitride B50N2.
- Author
-
Cherednichenko, Kirill A. and Solozhenko, Vladimir L.
- Subjects
- *
CRYSTALLIZATION , *SEPARATION (Technology) , *RIETVELD refinement , *MURNAGHAN equation , *EQUATIONS of state - Abstract
New boron subnitride B50N2 has been synthesized by crystallization from the B–BN melt at 5GPa, and its structure has been refined using Rietveld analysis. B50N2 crystallizes in the tetragonal space group P-4n2 with unit cell parameters a0=8.8181(2) Å and c0=5.0427(10) Å . Quasi-hydrostatic compression of two boron subnitrides, B50N2 and B13N2, has been studied up to 30 GPa at room temperature in a diamond-anvil cell using synchrotron X-ray diffraction. No pressure-induced phase transitions have been observed. A fit of experimental p-V data to the Murnaghan equation of state yielded B50N2 and B13N2 bulk moduli of 167(2) and 205(2) GPa, respectively, with fixed first bulk modulus pressure derivative of 4.0. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF