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Arthas Menethil, also known as the Lich King, one of the most prominent antagonists in Warcraft lore, appears as a raid boss in the Wrath of the Lich King expansion, as well as a playable character in the crossover video game Heroes of the Storm. In the Dota series of video games, Lich is one of the playable heroes. [28]
[39] [40] Ionium–thorium dating is a related process, which exploits the insolubility of thorium (both 232 Th and 230 Th) and thus its presence in ocean sediments to date these sediments by measuring the ratio of 232 Th to 230 Th. [41] [42] Both of these dating methods assume that the proportion of 230 Th to 232 Th is a constant during the ...
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Thorium(IV) carbide (Th C) is an inorganic thorium compound and a carbide. [1] [2] References This page was last edited on 10 March 2024, at 20:30 (UTC). Text is ...
Thorium dioxide (ThO 2), also called thorium(IV) oxide, is a crystalline solid, often white or yellow in colour. Also known as thoria, it is mainly a by-product of lanthanide and uranium production. [4] Thorianite is the name of the mineralogical form of thorium dioxide. It is moderately rare and crystallizes in an isometric system.
Monazite contains 2.5% thorium, allanite has 0.1 to 2% thorium and zircon can have up to 0.4% thorium. [2] Thorium-containing minerals occur on all continents. [3] [4] [5] Thorium is several times more abundant in Earth's crust than all isotopes of uranium combined and thorium-232 is several hundred times more abundant than uranium-235. [6]
New thorium(IV) hydroxide is soluble in acid but its solubility will decrease when older. [1] Thorium(IV) hydroxide will break up at high temperature and produce thorium dioxide: Th(OH) 4 → ThO 2 + 2 H 2 O. At high pressure, thorium(IV) hydroxide reacts with carbon dioxide, and produce thorium carbonate hemihydrate. [2]
Thorite, (Th,U)SiO 4, is a rare nesosilicate of thorium that crystallizes in the tetragonal system and is isomorphous with zircon and hafnon. It is the most common mineral of thorium and is nearly always strongly radioactive. Thorite was discovered in 1828 on the island of Løvøya, Norway, by the vicar and mineralogist, Hans Morten Thrane Esmark.