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New phase diagram of Zn-doped CuGe<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>
A series of high-quality single crystals of ${\mathrm{Cu}}_{1\ensuremath{-}x}{\mathrm{Zn}}_{x}\mathrm{Ge}{\mathrm{O}}_{3}$ have been examined by neutron-scattering techniques. An antiferromagnetic (AF) ordering is confirmed for four samples in the range $0.009<~x<~0.047$, in complete agreement with previous reports. We show that the spin-Peierls (SP) phase transition persists to 4.7% Zn, whereas previous magnetic-susceptibility measurements reported …