FeAs2

FeAs2, also known as iron diarsenide, is a chemical compound with the formula FeAs2. It is a crystalline solid belonging to the marcasite group, which is an orthorhombic crystal system. The structure of FeAs2 consists of iron atoms coordinated by arsenic atoms in a specific arrangement. This compound is relatively hard and brittle. It is typically found in nature as the mineral rammelsbergite, although it can also be synthesized in laboratories. FeAs2 is insoluble in water and most common acids. Its magnetic properties are complex, exhibiting antiferromagnetic behavior below a certain Néel temperature. The compound is not readily reactive under normal conditions. FeAs2 has found limited applications, primarily in research settings due to its mineralogical occurrence and crystallographic structure. It is not a commercially significant material. Further study is ongoing to understand its electronic and magnetic properties more thoroughly.

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