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钨铁是钨和铁为主要组成的铁合金，还含有锰、硅、碳、磷、硫、铜、锡等杂质，是炼钢用的合金剂。

钨酸钠是白色具有光泽的片状结晶或结晶粉末，溶于水，不溶于乙醇，微溶于氨。

Yellow tungsten oxide is a finely divided, yellow crystalline powder, it is produced by roasting ammonium paratungstate at closely controlled temperatures to drive off combined water or water and ammonia.

氧化钨是钨的氧化物，是从钨矿制取单质钨工业的重要中间体。

碳化钨粉为黑色六方晶体，有金属光泽，硬度与金刚石相近，为电、热的良好导体。

钨酸盐[Tungstate]，是阴离子含钨酸根（WO4 2-）或聚钨酸根（W7O24 6-）的盐。

Violet tungsten oxide is a purple or blue-violet crushed crystal powder, shorted for VTO, formula of WO2.72 or W18O49, prepared by APT wet hydrogen direct reduction, tungstic acid hydrogen reduction and APT mild reduction method, mainly used for manufacturing tungsten powder and tungsten carbide powder.

三氧化钨是钨的氧化物，是从钨矿制取单质钨工业的重要中间体。

仲钨酸铵是一种化学物质，主要是白色结晶，有片状或针状二种，用于制造三氧化钨或蓝色氧化钨制金属钨粉。

Blue tungsten oxide, short for BTO, is a kind of tungsten oxide, the appearance is dark blue in powder form.

钨酸是无色结晶或白色结晶性粉末，溶于水，不溶于乙醇，微溶于氨。

钨属于稀有元素，在地壳中含量仅为0.007%，我国钨储量约占世界总储量的55%，居首位。

there are 10 types of tungsten ore deposits in South China: granite, porphyry, volcanic, pegmatite, skarn, greisen...