Low Temperature Physics: 37, 431 (2011); https://doi.org/10.1063/1.3606458 (4 pages)
Физика Низких Температур: Том 37, Выпуск 5 (Май 2011), c. 543-546    ( к оглавлению , назад )

Phase transition line of solid molecular nitrogen into CG-polymeric phase

L.N. Yakub

Thermophysics Department, Odessa State Refrigeration Academy, 1/3 Dvoryanskaya, Odessa 65082, Ukraine
E-mail: unive@icn.od.ua

Received December 17, 2010


The coexistence line of two high-pressure phases of solid nitrogen: molecular and polymeric cubic gauche (CG) has been predicted using two separate equations of state. Phase transition parameters: latent heat, volume and entropy jumps were calculated. At low temperature the predicted volume jump ΔV(P) is in agreement with recent experimental data; at elevated temperatures P(T)-curve tends to the vicinity of the pressure maximum on the melting line.

PACS: 05.70.Fh Phase transitions: general studies;
PACS: 61.50.Ks Crystallographic aspects of phase transformations; pressure effects;
PACS: 64.10.+h General theory of equations of state and phase equilibria.

Key words: phase equilibria, high-pressure phase, polymeric phases, nitrogen.