Grey arsenic (α-As, space group R 3 m No. 166) adopts a double-layered structure consisting of many interlocked, ruffled, six-membered rings. Because of weak bonding between the layers, grey arsenic is brittle and has a relatively low Mohs hardness of 3.5.

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 ]

Feb 7, 2025 · Arsenic, a chemical element in the nitrogen group (Group 15 [Va] of the periodic table), existing in both gray and yellow crystalline forms. Its chemical symbol is As, and it was first clearly identified as a free substance in 1649 by German pharmacist Johann Schroeder.

Feb 15, 2024 · In this work, the structural and electrical properties of gray arsenic under high pressure have been systematically explored. Two structural phase transitions, A7 phase of gray arsenic to simple cubic phase and simple cubic phase to host-guest phase, were revealed at ∼28 and ∼35 GPa, respectively.

May 4, 2023 · Arsenic has three allotropes : yellow, grey, and black, grey being the most common. Arsenic and its compound are toxic. It is brittle solid and is not a good conductor of heat and electricity.

Arsenic is chemical element 33 on the periodic table. Its symbol is As. Its atomic number is 33 and its atomic mass is 74.92. It is a toxic metalloid. It is in the pnictogen group on the periodic table. Arsenic is found in three allotropes. Gray arsenic is the most common. It is a brittle, somewhat soft metalloid that is a little shiny.

Jul 3, 2019 · Gray arsenic is a very brittle semi-metallic solid. It is steel-gray in color, crystalline, tarnishes readily in air, and is rapidly oxidized to arsenous oxide (As 2 O 3 ) upon heating (arsenous oxide exudes the odor of garlic).

Dec 3, 2023 · Gray arsenic is the most stable and abundant form at room temperature. It appears as a metallic, soft, silvery-gray, brittle solid. While a metalloid, it becomes a semiconductor under specific conditions.

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On a fresh or preserved surface, Arsenic has a tin-white color, but otherwise tarnishes dark gray. Arsenic and Antimony are almost identical. In many instances, the only way to tell them apart is by conducting complex scientific tests.