2015年4月6日 · Calomel (Hg2Cl2), also called mercurous chloride or mercury (I) chloride, a very heavy, soft, white, odourless, and tasteless halide mineral formed by the alteration of other mercury minerals, such as cinnabar or amalgams.

calomel (Hg 2 Cl 2), a very heavy, soft, white, odourless, and tasteless halide mineral formed by the alteration of other mercury minerals, such as cinnabar or amalgams. Calomel is found together with native mercury, cinnabar, calcite, limonite, and clay at Moschellandsberg

2019年4月11日 · “Calomel” was the curious name given to mercurous chloride, Hg2Cl2, the most common medicine of the era. Why curious? Because the name derives from the Greek “calos” meaning “good,” and “melas” for “black.” Well, calomel was neither black nor good.

The meaning of CALOMEL is a white tasteless compound Hg2Cl2 used especially as a component of laboratory electrodes, as a fungicide, and formerly in medicine as a purgative —called also mercurous chloride.

2009年5月17日 · Calomel | Hg2Cl2 or Cl2Hg2 | CID 24956 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.

Calomel is an uncommon mineral, found primarily in known mercury deposits. Some of the better known localities for this mineral include Landsberg, Rhineland-Palatinate, Germany; Terlingua, Brewster Co., Texas; and the Challenge deposit, Emerald Lake Hills, San Mateo Co., California.

From Greek kalos = beautiful and melos = black, because it turns black when it comes into contact with ammonia. This reaction, which was already known to the alchemists centuries ago, is used as a test for mercury (I).

Calomel is a mercury chloride mineral with formula Hg2Cl2 (see mercury(I) chloride). The name derives from Greek kalos (beautiful) and melas (black) because it turns black on reaction with ammonia. This was known to alchemists.

Tabular white to colorless tetragonal crystal aggregates of calomel associated with an unidentified orange-red species and yellow gianellaite. The field of view is 5 mm. Robert Meyer specimen and photograph.

Calomel is a simple compound insoluble in both fat and water, and composed of mercury and chlorine atoms (Hg 2 Cl 2). Calomel was named for its black color (Calomelous is Greek for kalo = beautiful, and melos = black).4 The Greek philosopher Democritus was the first to describe a substance resembling calomel in a manuscript written circa 400 BC.

2024年10月5日 · Calomel is a white, tasteless powder that doesn't dissolve in water. Its chemical formula is Hg2Cl2, making it a unique mercury compound. Despite its past medical uses, calomel is toxic and must be handled with care. Today, it's used in electrochemistry and as a reference electrode in pH measurements. Curious about more intriguing facts?

Calomel HgCl c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Tetragonal. Point Group: 4/m2/m2/m. Of variable and complex habit; crystals commonly tabular on {001}, prismatic k [001], equant pyramidal, to 1 cm; in drusy crusts, earthy, massive. Twinning: On {112}, contact and penetration twins, may be repeated.

Mercury (I) chloride is the chemical compound with the formula Hg 2 Cl 2. Also known as calomel 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. [1] [2]

2019年4月10日 · “Calomel” was the curious name given to mercurous chloride, Hg2Cl2, the most common medicine of the era. Why curious? Because the name derives from the Greek “calos” meaning “good,” and “melas” for “black.”

Calomel can be identified in the field by its color variations, such as white, yellowish-gray, gray, yellowish-white, and brown. Its translucent to sub-translucent form has {100} poor and {011} poor cleavage. This mineral has an adamantine-resinous luster, with pale yellowish-white streak.