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The crystal structural and thermal expansion properties of solid solution Er 2−x Sm x W 3 O 12 (0≦x≦2.0) have been investigated by X-ray powder diffraction. The XRD patterns indicate that pure phases can form in the composition range of 0.0≦x≦0.5 with orthorhombic structure and 0.6≦x≦2.0 with monoclinic one. The cell parameters and unit cell volumes increase almost...
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