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Ruthenium is a chemical element ... latent fingerprints by reacting on contact with fatty oils or fats with sebaceous contaminants and producing brown/black ruthenium ...
Ruthenium trichloride is a well-known compound, existing in a black α-form and a dark brown β-form: the trihydrate is red. [7] Of the known trihalides, trifluoride is dark brown and decomposes above 650 °C, tribromide is dark-brown and decomposes above 400 °C, and triiodide is black. [ 6 ]
Ruthenium(IV) oxide is the inorganic compound with the formula Ru O 2. This black solid is the most common oxide of ruthenium . It is widely used as an electrocatalyst for producing chlorine, chlorine oxides, and O 2 . [ 1 ]
Laurite is an opaque black, metallic ruthenium sulfide mineral with formula: RuS 2. It crystallizes in the isometric system. It is in the pyrite structural group. Though it's been found in many localities worldwide, it is extremely rare. Laurite has a Mohs hardness of 7.5 and a specific gravity of 6.43.
The most important reagents for the introduction of ruthenium are ruthenium(III) chloride and triruthenium dodecacarbonyl. In its organometallic compounds, ruthenium is known to adopt oxidation states from -2 ([Ru(CO) 4] 2−) to +6 ([RuN(Me)4] −). Most common are those in the 2+ oxidation state, as illustrated below.
Ruthenium tetroxide is the inorganic compound with the formula RuO 4. It is a yellow volatile solid that melts near room temperature. [2] It has the odor of ozone. [3] Samples are typically black due to impurities. The analogous OsO 4 is more widely used and better known. It is also the anhydride of hyperruthenic acid (H 2 RuO 5).
Barium ruthenate is an inorganic compound, with the chemical formula of BaRuO 3.It can be obtained from the stoichiometric reaction of barium oxide and ruthenium(IV) oxide at temperatures below 1200 °C, [3] or from the thermal decomposition of Ba[Ru(NO)(NO 2) 4 (OH)]·xH 2 O. [4] It reacts with ruthenium and ruthenium(IV) oxide at 1250 °C to obtain black needle-like crystal BaRu 6 O 12. [5]
It is a constituent of a number of essential oils, most commonly the oil of cumin and thyme. Significant amounts are formed in sulfite pulping process from the wood terpenes. p-Cymene is a common ligand for ruthenium. The parent compound is [(η 6-cymene)RuCl 2] 2.