Stannoidite

{{Infobox mineral

| name = Stannoidite

| category = Sulfide mineral

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| image = Stannoidite.jpg

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| caption = Silvery stannoidite crystals from the Akenobe Mine, Yabu City, Honshu Island, Japan, associated with chalcopyrite

| formula = Cu₆⁺Cu₂²⁺(Fe²⁺,Zn)₃Sn₂S₁₂

| IMAsymbol = Sta{{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}}

| unit cell = a = 10.76 Å, b = 5.4 Å
c = 16.09 Å, Z = 2

| molweight =

| strunz = 2.CB.15c

| system = Orthorhombic

| class = Disphenoidal (222)
H-M symbol: (2 2 2)

| symmetry = I222 (No. 23)

| color = Brass brown

| habit = Uniformly indistinguishable crystals forming large masses

| twinning =

| cleavage = None

| fracture = Conchoidal – uneven

| tenacity =

| mohs = 4

| luster = Metallic

| refractive =

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| streak = Brown gray

| gravity = 4.29

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| diaphaneity = Opaque

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| references = [http://webmineral.com/data/Stannoidite.shtml Stannoidite]. Webmineral[http://www.mindat.org/min-3748.html Stannoidite]. Mindat.org{{cite journal|author=Kudoh Y., Takeuchi Y. | title=The superstructure of stannoidite| journal=Zeitschrift für Kristallographie – Crystalline Materials| volume=144| issue=1–6| pages=145–160| doi=10.1524/zkri.1976.144.16.145| bibcode=1976ZK....144..145K| year=1976| s2cid=201808201}}

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Stannoidite is a sulfide mineral composed of five chemical elements: copper, iron, zinc, tin and sulfur. Its name originates from Latin stannum (tin) and Greek eides (or Latin oïda meaning "like"). The mineral is found in hydrothermal Cu-Sn deposits.

Stannoidite was first described in 1969 for an occurrence in the Konjo mine, Okayama prefecture, Honshu Island, Japan.