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is [xe] f d s . the hafnium atom has a radius of .pm and its van der waals radius is .pm. in its elemental form, cas - - , hafnium has a steel gray appearance. hafnium does not exist as a free element in nature. it is found in zirconium compounds such as zircon (zrsio ). hafnium was first predicted
weight: earth - seawater (oceans), ppb by atoms: earth - crust (crustal rocks), ppb by weight: earth - crust (crustal rocks), ppb by atoms: sun - total, ppb by weight: sun - total, ppb by atoms: stream, ppb by weight: n/a stream, ppb by atoms: n/a meterorite (carbonaceous), ppb by weight: meterorite...
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