Using the composite graphite rods with the sulphide of iron group metals as anode, the double-wall carbon nanotubes have been fabricated by arc discharging under hydrogen atmosphere.

用含有铁族金属硫化物的复合石墨棒作阳极，在氢气氛围下实施电弧放电，制备出了双壁纳米碳管。

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Australia's Fortescue Metals Group, a leading exporter of iron ore, plummeted 8.1 percent.

澳大利亚主要的铁矿石出口商，弗特斯科股价大跌8.1%。

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Commodities currently mined in the region include nickel, cobalt, platinum group metals, zinc, iron ore, and ilmenite, as well as gold.

FORBES: Quebec's Plan Nord Encountering Opposition by Chief of Assembly, First Nations

Tuesday's move by Alcoa follows Monday's decision by Australian iron ore miners Rio Tinto and Fortescue Metals Group to cut their annual production by 10.0% due to weakening demand from China.

FORBES: Magazine Article

Class M asteroids are composed of iron with large amounts of nickel, cobalt, and platinum group metals.

FORBES: Move up http://i.forbesimg.com t Move down