Thorium(IV) carbide

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Thorium(IV) carbide
3D model (JSmol)
ECHA InfoCard 100.031.418 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 234-574-0
PubChem CID
  • InChI=1S/C.Th
  • [C]#[Th]
Molar mass 244.049 g/mol
Density 10.6 g/cm3, solid
Melting point 2,500 °C (4,530 °F; 2,770 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Thorium(IV) carbide (Th C) is an inorganic thorium compound and a carbide. [1] [2]

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Thorium Chemical element, symbol Th and atomic number 90

Thorium is a weakly radioactive metallic chemical element with the symbol Th and atomic number 90. Thorium is silvery and tarnishes black when it is exposed to air, forming thorium dioxide; it is moderately soft and malleable and has a high melting point. Thorium is an electropositive actinide whose chemistry is dominated by the +4 oxidation state; it is quite reactive and can ignite in air when finely divided.

Silicon carbide Extremely hard semiconductor containing silicon and carbon

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Thorium dioxide Chemical compound

Thorium dioxide (ThO2), also called thorium(IV) oxide, is a crystalline solid, often white or yellow in colour. Also known as thoria, it is produced mainly as a by-product of lanthanide and uranium production. Thorianite is the name of the mineralogical form of thorium dioxide. It is moderately rare and crystallizes in an isometric system. The melting point of thorium oxide is 3300 °C – the highest of all known oxides. Only a few elements (including tungsten and carbon) and a few compounds (including tantalum carbide) have higher melting points. All thorium compounds, including the dioxide, are radioactive because there are no stable isotopes of thorium.

Boron carbide Extremely hard ceramic compound

Boron carbide (chemical formula approximately B4C) is an extremely hard boron–carbon ceramic and covalent material used in tank armor, bulletproof vests, engine sabotage powders, as well as numerous industrial applications. With a Vickers hardness of >30 GPa, it is one of the hardest known materials, behind cubic boron nitride and diamond.

Tantalum carbide Chemical compound

Tantalum carbides (TaC) form a family of binary chemical compounds of tantalum and carbon with the empirical formula TaCx, where x usually varies between 0.4 and 1. They are extremely hard, brittle, refractory ceramic materials with metallic electrical conductivity. They appear as brown-gray powders, which are usually processed by sintering.

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Thorium (90Th) has seven naturally occurring isotopes but none are stable. One isotope, 232Th, is relatively stable, with a half-life of 1.405×1010 years, considerably longer than the age of the Earth, and even slightly longer than the generally accepted age of the universe. This isotope makes up nearly all natural thorium, so thorium was considered to be mononuclidic. However, in 2013, IUPAC reclassified thorium as binuclidic, due to large amounts of 230Th in deep seawater. Thorium has a characteristic terrestrial isotopic composition and thus a standard atomic weight can be given.

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Uranium carbide Chemical compound

Uranium carbide, a carbide of uranium, is a hard refractory ceramic material. It comes in several stoichiometries (x differs in UCx), such as uranium methanide (UC, CAS number 12070-09-6), uranium sesquicarbide (U2C3, CAS number 12076-62-9), and uranium acetylide (UC2, CAS number 12071-33-9).

Thorium(IV) chloride Chemical compound

Thorium(IV) chloride describes a family of inorganic compounds with the formula ThCl4(H2O)n. Both the anhydrous and tetrahydrate (n = 4) forms are known. They are hygroscopic, water-soluble white solids.

Beryllium carbide, or Be2C, is a metal carbide. Similar to diamond, it is a very hard compound. It is used in nuclear reactors as a core material.

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  1. NIST Standard Reference Data (2021). "Thorium carbide". Retrieved 2021-12-23.
  2. Wilhelm, H.A.; Chiotti, P. "Thorium-carbon system (Technical Report) | OSTI.GOV". OSTI   5713558 . Retrieved 2021-12-23.