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In this paper, we characterize the closures of convex hulls of unitary orbits of self-adjoint operators in unital, separable, simple 
${{\text{C}}^{*}}$ -algebras with non-trivial tracial simplex, real rank zero, stable rank one, and strict comparison of projections with respect to tracial states. In addition, an upper bound for the number of unitary conjugates in a convex combination needed to approximate a self-adjoint are obtained.
