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Raman spectroscopy is employed to study the compositional and temperature dependence of optical phonon modes in SixGe1-x(0.0037≤.×≤1) alloy. Czochralski grown samples are doped in the range from nominally undoped to heavily boron doped, with the highest concentration of free holes of 1020 cm-3. Three observed bands can be attributed to local Si-Si, Ge-Ge and Si-Ge vibrational modes. We present compositional dependence and temperature shift of the Si-Si band.