2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/171303The material presented here is supplementary to the article entitled: "Density-functional investigation of the rhombohedral to simple cubic phase transition of arsenic"; it deals with the convergence issues involved in studying a semi-metal to metal structural phase transition such as the A7 to sc transition of arsenic.This material is supplementary to arXiv:0810.1692Materials Sciencetext