Burning an ethanolic solution of vanadyl(IV) acetylacetonate in a glass beaker affords monoclinic VO2 [VO2(M)], and thus brings this formerly expensive oxide into the realm of conventional laboratory synthesis. Differential scanning calorimetry (DSC) showed consistent heating and cooling curves (see picture) for 50 reversible transitions between VO2(M) and the higher-temperature rutile phase of VO2.
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Wu et al. (2009) studied this question.
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