Generic name for certain mixed oxides of molybdenum
"Purple bronze" redirects here. Not to be confused with Hepatizon, a form of bronze which takes on a purple-colored patina.
In chemistry, molybdenum bronze is a generic name for certain mixed oxides of molybdenum with the generic formula A xMo yO z where A may be hydrogen, an alkali metal cation (such as Li+, Na+, K+), and Tl+. These compounds form deeply coloured plate-like crystals with a metallic sheen, hence their name. These bronzes derive their metallic character from partially occupied 4d bands.[1] The oxidation states in K0.28MoO3 are K+1, O2−, and Mo+5.72. MoO3 is an insulator, with an unfilled 4d band.
These compounds have been much studied since the 1980s due to their markedly anisotropic electrical properties, reflecting their layered structure. The electrical resistivity can vary considerably depending on the direction, in some cases by 200:1 or more. They are generally non-stoichiometric compounds. Some are metals and some are semiconductors.
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In chemistry, molybdenumbronze is a generic name for certain mixed oxides of molybdenum with the generic formula A xMo yO z where A may be hydrogen, an...
Lithium molybdenum purple bronze is a chemical compound with formula Li 0.9Mo 6O 17, that is, a mixed oxide of molybdenum and lithium. It can be obtained...
stability of the tungsten(V) cation that is formed. A similar family of molybdenumbronzes may have been discovered in 1885 by Alfred Stavenhagen and E. Engels...
few species of bacteria and archaea. However, tungsten interferes with molybdenum and copper metabolism and is somewhat toxic to most forms of animal life...
deposits in 1930, the Soviet government proposed to build a large copper-molybdenum plant. By the end of the 1930s, a plan was proposed to build a settlement...
Alloy steels can be made by adding other elements, such as chromium, molybdenum, vanadium or nickel, resulting in alloys such as high-speed steel or tool...
corrosion. It contains iron with chromium and other elements such as molybdenum, carbon, nickel and nitrogen depending on its specific use and cost. Stainless...
crystals and a 1 cm3 anodized niobium cube for comparison Molybdenum crystals and a 1 cm3 molybdenum cube for comparison Tantalum single crystal, some crystalline...
active sulfur. Molybdenum compounds decompose under high pressure to form an in-situ deposited layer of molybdenum disulfide. Molybdenum dithiocarbamates...
lead that has no stable isotopes (along with promethium), as well as molybdenum and iodine, two of the heaviest elements with a known biological role...
for materials with extremely high melting points, such as tungsten and molybdenum. The study of sintering in metallurgical powder-related processes is known...
minerals. A large scale application of sulfidation is the conversion of molybdenum oxides to the corresponding sulfides. This conversion is a step in the...
is 0.55% carbon, 0.30% manganese, 0.30% silicon, 5.00% chromium, 1.25% molybdenum, and 1.25% vanadium. A8 A9 A10, a grade which contains a uniform distribution...
fiber blocker rings, and 5th and Reverse gears use molybdenum on their synchronizers. Carbon and molybdenum are extremely durable friction surfaces that remain...
molybdenum disulphide, tungsten disulphide, etc.), PTFE tape used in plumbing, air cushion and others. Dry lubricants such as graphite, molybdenum disulphide...
oxidize in air and water. The first tin alloy used on a large scale was bronze, made of 1⁄8 tin and 7⁄8 copper (12.5% and 87.5% respectively), from as...
like grease and oil, low-friction coatings and thin-film deposits like molybdenum disulfide or titanium nitride, and increasing the surface hardness of...
Stainless steel is an alloy of iron, chromium, possibly nickel, and molybdenum, with only a small amount of carbon. It is not able to take quite as sharp...
addition, a stalagmite from Turkey shows bromine peaks at 1621 ± 25 BCE, molybdenum at 1617 ± 25 BCE and sulfur at 1589 ± 25 BCE. The authors interpreted...
with greater than 10% by weight alloying content of chromium. Nickel and molybdenum are typically also added in stainless steels. Other significant metallic...
require flux for copper. Can be also used with silver, tungsten, and molybdenum. Copper-rich alloys prone to stress cracking by ammonia. Ag-Cu-P Like...
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