Mining officials

Samarskite, a mineral) Discovered spectroscopically by its sharp absorption lines in 1879 by Lecoq de Boisbaudran in the mineral samarskite, named in honor of a Russian mine official. Col Samarski. 

Samarium - the atomic number is 62 and the chemical symbol is Sm. The name derives from the mineral Samarskite, in which it was found and which had been named for Colonel von Samarski , a Russian mine official. It was originally discovered in 1878 by the Swiss chemist Marc Delafontaine, who called it decipium. It was also discovered by the French chemist Paul-Emile Lecoq de Boisbaudran in 1879. In 1881, Delafontaine determined that his decipium could be resolved into two elements, one of which was identical to Boisbaudran s samarium. In 1901, the French chemist Eugene-Anatole Demar9ay showed that this samarium earth also contained europium. 

Using a spectrometer in 1853, Jean Charles-GaUisard de Marignac (1817—1894) suspected that dydimia was a mixture of yet-to-be-discovered elements. However, it was not until 1879 that Paul-Emile Locoq de Boisbaudran (1838—1912), using a difficult chemical fractionation process, discovered samarium in a sample of samarskite, calling it samarium after the mineral, which was named for a Russian mine official. Colonel von Samarski. Samarskite ore is found where didymia is found. Didymia ( twins ) was the original name given to a combination of the two rare-earths (praseodymium and neodymium) before they were separated and identified. 

The discovery of samarium is credited to Boisbaudran, who in 1879 separated its oxide, samaria from Mosander s didymia, the mixture of rare earth oxides from which cerium and lanthanum were isolated earher. Demarcay in 1901 first identified samaria to be a mixture of samarium and europium oxides. The element got its name from its mineral, samarskite. The mineral, in turn, was named in honor of the Russian mine official Col. Samarki. 

The name samarium was taken from a mineral in which it occurs, sa-marskite. The name of the mineral, in turn, comes from the last name of a Russian mine official. Colonel Samarski. 

Sm samarium, 62, 1879 from samarskite," a mineral named after a Russian mining official, Col. Samarski. 

By some reports gadolinium was the first element named for a person, but it was probably really named for the mineral that contained gadolinia, and the mineral was named for Johan Gadolin. By the same token samarium was named for the mineral samarskite, which had been named in honor of a Russian mine official. Colonel Samarski. It is difficult therefore to assert that the name gadolinium was meant to immortalize the chemist any more than the name samarium was meant to immortalize military personnel. What was unique about samarium however was its discovery using a new analytical technique spectroscopy. 

Samuel Stockhausen, a mine physician at Gos-lar, also dealt, in his Hiitten Katze (1656), with the diseases of mine - and smelter - workers. Most of the book is in Latin but Stockhausen added an appendix in German on the miners sickness, indicating that he realised the practical importance of such knowledge to both mine officials and mine workers. 

In eighteenth-century chemical experimental history, teaching, writing, and experimenting interacted and mutually stabilized each other. The expectations of students of chemistry played an important role in this practice. It was, in particular, practitioners—in the case of Boerhaave, mainly students of medicine, physicians, and apothecaries—who were keen to acquire connoisseurship of materials. For this audience of practitioners, which in the second half of the eighteenth century broadened considerably to include dyers and colorists, assayers and mining officials, chemical manufacturers, and so on, it was natural to proceed from descriptive experimental... 

C neutron absorber named after Colonel Samarski, Russian mine official discovered 1879 used to make alloys for nuclear reactor parts oxide used in permanent magnets. 

Samarium P. Lecoq de Boisboudran (French) (1879) Samarskite, a mineral. The mineral was named for a Russian mining official Col. Samarski... 

Before they inspect the mine, inspectors must conduct a pre-inspection conference with mine officials and miners representatives to discuss the scope and purpose of this investigation. Following an inspection, they must meet again with management and miners again in a post-inspection confer-... 

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