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镓是分布最广的稀有元素之一。这一金屬的克拉克值为1.5×10~(-3)％,几乎等于鉛的克拉克值,而大大超过其他如钼、鎢、銻、汞、砷、鉍等元素的克拉克值。同时,镓突出的特征是它在地壳內不形成任何富集而成为典型的分散元素。镓在1874年为Л.德-布阿包德蘭發現后,長期間未得到广泛的实际应用。故
Gallium is one of the most widely distributed and rare elements. This metal has a Clarke value of 1.5 × 10 -3%, which is almost equal to the Clarke value of lead and greatly exceeds the Clarke value of other elements such as molybdenum, tungsten, antimony, mercury, arsenic and bismuth. At the same time, the salient feature of gallium is that it does not form any enrichment in the earth’s crust as a typical dispersion element. Gallium was found in 1974 by Л. De-BouaDoudelain and was not widely used for a long time. Therefore