Enthalpies of sublimation of ferrocene and nickelocene measured by calorimetry and the method of Langmuir

► Calorimetric enthalpies of sublimation of ferrocene and nickelocene are supplied. ► Sublimation enthalpies of both metallocenes were also obtained by indirect Langmuir's method. ► Calorimetric and indirect enthalpies of sublimation are comparable in accuracy and dispersion. ► Sublimation enthalpies are congruent with both compounds being monoclinic and isostructural.