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Early models of key finder were sound-based, and listened for a clap or whistle (or a sequence of same), then beeped for the user to find them. Determining what was a clap or a whistle proved difficult, resulting in poor performance and false alarms. Because of this low quality and unreliability, these early key finders were soon discarded and ...
Over 20,000 years before World of Warcraft, the ancient ancestors of modern dragons, known simply as "proto-dragons", made a deal with a race of godlike beings known as the Titans, who empowered them with magic to transform them into the modern dragons. The dragons are divided into five dragonflights, distinct organizations each led by a ...
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Bismuth is a chemical element with the symbol Bi and atomic number 83. It is a post-transition metal and one of the pnictogens, with chemical properties resembling ...
Bismutite or bismuthite is a bismuth carbonate mineral with formula Bi 2 (CO 3)O 2 (bismuth subcarbonate). Bismutite occurs as an oxidation product of other bismuth minerals such as bismuthinite and native bismuth in hydrothermal veins and pegmatites. [3] It crystallizes in the orthorhombic system and typically occurs as earthy to fibrous ...
Kyawthuite was discovered in the vicinity of Mogok in Myanmar, an area famous for its variety of gemstone minerals. [6]Only one 0.3 gram sample of the naturally occurring form of this mineral is documented, and it is stored and on display at the Natural History Museum of Los Angeles County.
Bismuth(III) sulfide can be prepared by reacting a bismuth(III) salt with hydrogen sulfide: 2 Bi 3+ + 3 H 2 S → Bi 2 S 3 + 6 H + Bismuth (III) sulfide can also be prepared by the reaction of elemental bismuth and elemental sulfur in an evacuated silica tube at 500 °C for 96 hours. 2 Bi + 3 S → Bi 2 S 3
In 1753 he proved the chemical element bismuth to be distinct from lead, becoming the official discoverer of the element. Before this time, bismuth-containing minerals were frequently misidentified as either lead, tin, or antimony ores. His observations on the matter were published in the Mémoires de l’académie française in 1753. [1] [2]