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Message definition (Zinc ) ===Physical properties=== Zinc is a bluish-white, lustrous, [[diamagnetic]] metal, though most common commercial grades of the metal have a dull finish. It is somewhat less dense than [[iron]] and has a hexagonal [[crystal structure]], with a distorted form of [[Close-packing of equal spheres|hexagonal close packing]], in which each atom has six nearest neighbors (at 265.9 pm) in its own plane and six others at a greater distance of 290.6 pm. The metal is hard and brittle at most temperatures but becomes malleable between 100 and 150 °C. Above 210 °C, the metal becomes brittle again and can be pulverized by beating. Zinc is a fair [[electrical conductivity|conductor of electricity]]. For a metal, zinc has relatively low melting (419.5 °C) and boiling point (907 °C). The melting point is the lowest of all the [[d-block]] metals aside from [[mercury (element)|mercury]] and [[cadmium]]; for this reason among others, zinc, cadmium, and mercury are often not considered to be [[transition metal]]s like the rest of the d-block metals.
物理的性質
亜鉛は青みがかった白色で光沢のある反磁性 金属であるが、一般的な市販グレードの多くはくすんだ仕上げが施されている。密度は鉄 よりもやや低く、六角形の結晶構造 を持ち、歪んだ形の六角クローズパッキング を持つ。この金属はほとんどの温度で硬く脆いが、100~150 °Cの間では可鍛性になる。210 °Cを超えると再び脆くなり、叩いて粉砕することができる。亜鉛はかなりの電気伝導体 である。金属としては融点(419.5 °C)と沸点(907 °C)が比較的低い。融点は水銀 とカドミウム を除けばd-ブロック 金属の中で最も低く、このため亜鉛、カドミウム、水銀は他のd-ブロック金属と同様に遷移金属 とは見なされないことが多い。