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Grey arsenic is also the most stable form. Yellow arsenic is soft and waxy, and somewhat similar to tetraphosphorus (P 4). [22] Both have four atoms arranged in a tetrahedral structure in which each atom is bound to each of the other three atoms by a single bond. This unstable allotrope, being molecular, is the most volatile, least dense, and ...
Gray arsenic, also called grey arsenic or metallic arsenic, is the most stable allotrope of the element at room temperature, and as such is its most common form. [1] This soft, brittle allotrope of arsenic has a steel gray, metallic color, and is a good conductor. [2] The rhombohedral form of this allotrope is analogous to the phosphorus ...
Arsenic forms colorless, odorless, crystalline oxides As 2 O 3 ("white arsenic") and As 2 O 5 which are hygroscopic and readily soluble in water to form acidic solutions. Arsenic (V) acid is a weak acid and the salts are called arsenates, [5] the most common arsenic contamination of groundwater, and a problem that affects many people.
Although some European nations started banning arsenic-containing pigments in the 1830s and 1840s, Scheele's green did not completely fall out of favor until the 1860s. [21] Publicity associated with the 1861 death of 19-year-old Matilda Scheueur as a result of her job dusting artificial foliage with the pigment increased public awareness of ...
Orpiment, also known as ″ yellow arsenic blende ″ is a deep-colored, orange-yellow arsenic sulfide mineral with formula As. 2S. 3. It is found in volcanic fumaroles, low-temperature hydrothermal veins, and hot springs and may be formed through sublimation. Orpiment takes its name from the Latin auripigmentum (aurum, "gold" + pigmentum ...
Similarly, yellow arsenic is a molecular solid composed of As 4 units. [37] Some forms of sulfur and selenium are composed of S 8 (or Se 8) units and are molecular solids at ambient conditions, but converted into covalent allotropes having atomic chains extending throughout the crystal. [38] [39]
In its standard state arsine is a colorless, denser-than-air gas that is slightly soluble in water (20% at 20 °C) [1] and in many organic solvents as well. [citation needed] Arsine itself is odorless, [5] but it oxidizes in air and this creates a slight garlic or fish-like scent when the compound is present above 0.5 ppm. [6]
Infobox references. Arsenic trichloride is an inorganic compound with the formula AsCl 3, also known as arsenous chloride or butter of arsenic. This poisonous oil is colourless, although impure samples may appear yellow. It is an intermediate in the manufacture of organoarsenic compounds. [4]