Thermal expansion of α-boron and some boron-rich pnictides

Kirill Cherednichenko (1) , Vladimir Solozhenko (1)

1 LSPM - Laboratoire des Sciences des Procédés et des Matériaux

Thermal expansion of α-rhombohedral boron (α-B12) and two isostructural boron-rich pnictides (B12P2 and B12As2) has been studied between 298 and 1280 K by high-temperature synchrotron X-ray diffraction. For all studied phases no temperature-induced phase transitions have been observed. The observed temperature dependencies of the lattice parameters and unit cell volumes were found to be quasi-linear. Variation of the thermal expansion coefficients in the group of boron-rich pnictides (B13N2 – B12P2 – B12As2) was analyzed.

Mots clés: Boron; Boron pnictides; X-ray diffraction; Thermal expansion

Domaines: Matière Condensée [cond-mat]

Kirill Cherednichenko, Vladimir Solozhenko. Thermal expansion of α-boron and some boron-rich pnictides. Solid State Communications, 2019, 303-304, pp.113735. ⟨10.1016/j.ssc.2019.113735⟩. ⟨hal-02331172⟩