Allotropes of arsenic

Molecular structures of arsenic allotropes. Top left: Gray (metallic) arsenic, rhombohedral structure. Bottom left: Black arsenic, orthorhombic structure. Right: Yellow arsenic, tetrahedral configuration.[1]

Arsenic in the solid state can be found as gray, black, or yellow allotropes. These various forms feature diverse structural motifs, with yellow arsenic enabling the widest range of reactivity. In particular, reaction of yellow arsenic with main group and transition metal elements results in compounds with wide-ranging structural motifs, with butterfly, sandwich and realgar-type moieties featuring most prominently.

  1. ^ Seidl, Michael; Balázs, Gábor; Scheer, Manfred (2019-03-22). "The Chemistry of Yellow Arsenic". Chemical Reviews. 119 (14): 8406–8434. doi:10.1021/acs.chemrev.8b00713. ISSN 0009-2665. PMID 30900440. S2CID 85448636.

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