When heated, the ores produced poisonous fumes. Smelters weren’t fond of the ores either. The miners thought the cruel kobold had changed the silver into worthless rocks. Cobalt comes from the German word ‘kobold’ – small mountain elves or goblins. A relatively large percentage of the world’s production goes into magnetic alloys such as the Alnicos for permanent magnets. The metal is used especially for heat-resistant and magnetic alloys. She used several other names – magnesia, wismuth or the secretive ‘minera’ – even though German miners had earlier coined the word cobalt to describe the ores she studied. Cobalt, metallic chemical element, one of the transition elements, atomic number 27. Wallich never used the word cobalt in her books. In spite of her detailed research Wallich, like the other chymists, was unable to create the philosophers’ stone. Wallich became a much sought-after chymist following the publication of her books. When heated and cooled, the compounds have colours ranging from rose, violet blue, sky blue and grass green. She is credited with discovering and reporting many thermochromic effects of cobalt compounds. Boron can transmit part of infrared light. It can be used to produce green fire and is added as a common colorant in fireworks. ![]() Wallich’s books describe numerous chemical reactions in detail. Element atomic number 5 burns with a green flame. Cobalt, Co online All rights included High resolution vector file for print. Wallich’s goal was to produce the philosophers’ stone – a substance that could turn base metals such as lead and tin into silver and gold. Buy the royalty-free Stock vector Periodic Table of the element. Dorothea Juliana Wallich was interested in chymistry (a term that covers both alchemy and chemistry). Thirty years prior to Georg Brandt’s published account of separating cobalt from bismuth, a young German woman had already published three books about her research using ores that contained cobalt. IUPAC Periodic Table of the Elements and Isotopes (IPTEI) 6. Chymical research and the philosophers’ stone Comprehensive data on the chemical element Cobalt is provided on this page including scores of properties, element names in many languages, most known nuclides.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |