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Scam letter posted within South Africa. An advance-fee scam is a form of fraud and is a common confidence trick.The scam typically involves promising the victim a significant share of a large sum of money, in return for a small up-front payment, which the fraudster claims will be used to obtain the large sum.
Tetrasulfur tetranitride is an inorganic compound with the formula S 4 N 4.This vivid orange, opaque, crystalline explosive is the most important binary sulfur nitride, which are compounds that contain only the elements sulfur and nitrogen.
Apache Nitrogen Products (formerly Apache Powder Company) began in 1920 as an American manufacturer of black powder based explosives.In the 1930's production transitioned to nitroglycerin-based explosives (dynamite) for the mining industry and other regional users of dynamite.
Manganese nitrides are salts of manganese and the nitride ion. Four of these compounds are stable at atmospheric pressure.The most important is Mn 3 N 2, which catalyzes nitrogen fixation and is a high-temperature antiferromagnet.
Beta carbon nitride - a solid with a formula β-C 3 N 4, which is predicted to be harder than diamond. Graphitic carbon nitride - g-C 3 N 4, with important catalytic and sensor properties. [2] Dicyanodiazomethane (NC) 2 C=N=N, the only C 3 N 4 isomer studied experimentally; Tricyanamide N(CN) 3 - C 3 N 4 monomer (has never been prepared yet)
The fundamental reasons why TiAlN coatings outperform pure Titanium nitride (TiN) coatings are considered to be: Increased oxidation resistance at elevated temperatures due to the formation of a protective aluminium-oxide layer at the surface; Increased hardness in the freshly deposited films due to micro-structure changes and solid solution ...
Chromium nitride is a chemical compound of chromium and nitrogen with the formula CrN. It is very hard, and is extremely resistant to corrosion.It is an interstitial compound, with nitrogen atoms occupying the octahedral holes in the chromium lattice: [2] as such, it is not strictly a chromium(III) compound nor does it contain nitride ions (N 3−).
β-Carbon nitride (beta-carbon nitride), β-C 3 N 4, is a superhard material predicted to be harder than diamond. [ 2 ] The material was first proposed in 1985 by Amy Liu and Marvin L. Cohen .