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keemiline element, lantanoid, hõbevalge metall, stº 1024 ºC, tihedus 7,0 Mg/m3, a soft silvery metallic element belonging to the lanthanoids; a.n. 60; r.a.m. 144.24; r.d. 7.004 (20°); m.p. 1021°C; b.p. 3068°C
