Even though Hatchett wasn’t able to isolate the element, he read to the Royal Society about his discovery of a new element, which he named columbium, on November 26, 1801. In 1802, Swedish ...

As the name of the series implies, niobium (columbium) and tantalum occur in varying ratios, but even at the columbite end the proportion of tantalum is still appreciable, the ratio of niobium to ...

There are four distinct refractory metals. They are tungsten, molybdenum, tantalum, and columbium. Tungsten is a steel-gray metal that with impurities is brittle and not very workable but in pure form ...