maucherite

{{Short description|Nickel arsenide mineral}}

{{Infobox mineral

| name = Maucherite

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| image = Cubanite-Maucherite-Valleriite-199921.jpg

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| caption = Cubanite-maucherite-valleriite

| category = Arsenide mineral

| formula = Ni₁₁As₈

| IMAsymbol = Muc{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|journal=Mineralogical Magazine|volume=85|issue=3|pages=291–320|doi=10.1180/mgm.2021.43|bibcode=2021MinM...85..291W|s2cid=235729616|doi-access=free}}

| molweight =

| strunz = 2.AB.15

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| system = Tetragonal

| class = Trapezohedral (422)
(same H-M symbol)

| symmetry = P4₁2₁2, P4₃2₁2

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| color = grey to reddish silver white

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| mohs = 4.5–5.5

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| streak = grayish black

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| gravity = 6.9–7.3

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| references = [https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Maucherite Mineralienatlas]

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Maucherite is a grey to reddish silver white nickel arsenide mineral. It crystallizes in the tetragonal crystal system. It occurs in hydrothermal veins alongside other nickel arsenide and sulfide minerals. It is metallic and opaque with a hardness of 5 and a specific gravity of 7.83. It is also known as placodine and Temiskamite. The unit cell is of symmetry group P4₁2₁2 or P4₃2₁2.

It has the chemical formula: Ni₁₁As₈ and commonly contains copper, iron, cobalt, antimony, and sulfur as impurities.

It was discovered in 1913 in Eisleben, Germany and was named after Wilhelm Maucher (1879–1930), a German mineral collector.