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Mercury(I) chloride is the chemical compound with the formula Hg 2 Cl 2. Also known as the mineral calomel [4] (a rare mineral) or mercurous chloride, this dense white or yellowish-white, odorless solid is the principal example of a mercury(I) compound. It is a component of reference electrodes in electrochemistry. [5] [6]
The richest mercury ores contain up to 2.5% mercury by mass, and even the leanest concentrated deposits are at least 0.1% mercury (12,000 times average crustal abundance). It is found either as a native metal (rare) or in cinnabar, metacinnabar, sphalerite, corderoite, livingstonite and other minerals, with cinnabar (HgS) being the most common ore.
Mercury (I) nitrate is an inorganic compound, a salt of mercury and nitric acid with the formula Hg 2 (NO 3) 2. A yellow solid, the compound is used as a precursor to other Hg 22+ complexes. The structure of the hydrate has been determined by X-ray crystallography. It consists of a [H 2 O-Hg-Hg-OH 2] 2+ center, with a Hg-Hg distance of 254 pm. [2]
Mercury (I) sulfate, commonly called mercurous sulphate (UK) or mercurous sulfate (US) is the chemical compound Hg 2 SO 4. [3] Mercury (I) sulfate is a metallic compound that is a white, pale yellow or beige powder. [4] It is a metallic salt of sulfuric acid formed by replacing both hydrogen atoms with mercury (I).
Mercury (I) oxide, also known as mercurous oxide, is an inorganic metal oxide with the chemical formula Hg 2 O. It is a brown/black powder, insoluble in water but soluble in nitric acid. With hydrochloric acid, it reacts to form calomel, Hg 2 Cl 2. [4] Mercury (I) oxide is toxic but without taste or smell.
Calomel is a mercury chloride mineral with formula Hg 2 Cl 2 (see mercury(I) chloride). It was used as a medicine from the 16th to early 20th century, despite frequently causing mercury poisoning in patients. [5] The name derives from Greek kalos (beautiful) and melas (black) because it turns black on reaction with ammonia. This was known to ...
Distances in picometers. [1] Mercury polycations are polyatomic cations that contain only mercury atoms. The best known example is the Hg2+. 2 ion, found in mercury (I) (mercurous) compounds. The existence of the metal–metal bond in Hg (I) compounds was established using X-ray studies in 1927 [2][page needed] and Raman spectroscopy in 1934 [3 ...
Mercury (I) iodide was a commonly used as a drug in the 19th century, sometimes under the contemporary name of protiodide of mercury. It was used to treat a wide range of conditions; everything from acne to kidney disease and in particular was the treatment of choice for syphilis. It was available over the counter at any drugstore in the world ...