Hafnium:
Hafnium is a chemical element with the symbol Hf and atomic number 72. A lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in zirconium minerals.
en.wikipedia.org
铪:
铪是一种化学元素，它的化学符号是Hf，它的原子序数是72，原子量178.49，属周期系ⅣB族。
zh.wikipedia.org
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Hafnium铪