Ventolà, L.Bayés-García, LauraBenages Vilau, RaúlNovegil González-Anleo, Francisco JavierCuevas Diarte, Miguel ÁngelCalvet Pallàs, Maria TeresaMondieig, Denise, 1958-2020-05-152020-05-152008-070018-019Xhttps://hdl.handle.net/2445/160417The experimental temperature/composition phase diagram of the binary system decanedioic acid (C10H18O4)/dodecanedioic acid (C12H22O4) was established by combining X-ray powder diffraction (XRD), differential-scanning calorimetry (DSC), infrared spectroscopy (IR), scanning electron microscopy (SEM), and thermo-optical microscopy (TOM). Both compounds crystallize in the same ordered form, C (P21/c), which is the phase that melts in both cases. The C form melts in C12H22O4 earlier than in C10H18O4 , in contrast to other unbranched-chain compounds (alkanes, alkanols, and alkanoic acids) in which the melting temperatures increase as the C-atom number rises. Contrary to what might be expected, total solid-state miscibility is not observed. The C10H18O4/C12H22O4 binary system shows a complex phase diagram. At low temperatures, a new monoclinic form, Ci (P21/c), stabilizes as a result of the disorder of composition in the mixed samples; two [C þ Ci] domains appear. Upon heating, four solid - solid and seven solid - liquid domains appear related by eutectic and peritectic invariants. All the crystallographic forms observed are isostructural.13 p.application/pdfeng(c) Verlag Helvetica Chimica Acta, 2008Polimorfisme (Cristal·lografia)Polymorphism (Crystallography)info:eu-repo/semantics/article5600862020-05-15info:eu-repo/semantics/openAccess