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Online dictionary - over 2 million references

 





boron


1. 发生非常在硼砂的一个非金属元素。 当它可以获得以几不同的形式时,它减少有困难到自由州; 即,作为一种深刻的橄榄色的颜色的物质,以semimetallic形式和在无色的二次方水晶相似与金刚石在坚硬和其他物产。 它也发生本质上在boracite、datolite、电气石和其他矿物。 原子量10.9。 标志B。
2. 一个三价非金属元素; 发生在坚硬黑水晶和以一粒黄色或棕色粉末的形式


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