Melting of boron subphosphide (B12P2) to 26 GPa has been studied by in situ synchrotron X-ray powder diffraction in a laser-heated diamond anvil cell, and by quenching and electrical resistance measurements in a toroid-type high-pressure apparatus. B12P2 melts congruently, and the melting curve has a positive slope of 23(6) K/GPa. No solid-state phase transition was observed up to the melting in the whole pressure range under study.
@article{arxiv.1601.02930,
title = {Melting of B12P2 boron subphosphide under pressure},
author = {Vladimir L. Solozhenko and Vladimir A. Mukhanov and Petr S. Sokolov and Yann Le Godec and Kirill A. Cherednichenko and Zuzana Konôpková},
journal= {arXiv preprint arXiv:1601.02930},
year = {2016}
}