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The low-temperature structural phase transitions of Bi, Pb, In and Sn-doped samples of thermoelectric Zn 4 Sb 3 have been characterized on crystals grown from molten metal fluxes, using electrical resistance and single crystal X-ray diffraction measurements. Room temperature stable, disordered, β-Zn 4 Sb 3 undergoes two phase transitions at 254 and 235K to the consecutively...
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