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铼是在26年前發現的。它是最罕見的金屬,並且是穩定性元素系中的最末一個。在其發現后二十五年的今天,可以对此一特別稀有的金屬在工業中的应用做出結論。製取铼的首次試驗曾遇到了很大的困难。从这些試驗所製取的數量足以測定其技術上最重要的性能。主要困难是因為不知道在那些矿物內、矿石內或工業產物內含有铼。在大部分矿物和矿石中铼的含量是10~(-9)至10~(-8),並且只是輝钼矿含此金屬此較多一些10~(-5)。第一克的铼就是花費了很多代價从辉钼矿提製出來的。下列資料是铼及週期表上与铼相近的一些元素之分佈情况的对照表。已知铼在地殼中的含量等於钼7000分之一,等於铱10分之一。
Rhenium was discovered 26 years ago. It is the rarest metal and is the last of the stable elemental systems. Twenty-five years after its discovery, it is possible to conclude the application of this particularly rare metal in the industry. The first trial of rhenium encountered great difficulties. The quantities made from these tests are sufficient to determine their most technically important properties. The main difficulty is due to the ignorance of rhenium in those minerals, in ores or in industrial products. The rhenium content in most minerals and ores ranges from 10 -9 to 10 -8, and only the molybdenite contains this metal more than 10 -5. The first gram of rhenium was spent at a great deal of cost extracted from the molybdenite. The following information is rhenium and rhenium on the periodic table similar to the distribution of some of the elements of the table. It is known that the amount of rhenium in the earth’s crust is equal to one seventh of molybdenum, which is equal to one tenth of that of iridium.