Tugarinovite

{{Short description|Oxide mineral}}

{{Infobox mineral

| name = Tugarinovite

| boxwidth =

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| image = Tugarinovite.jpg

| imagesize = 260

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| caption = Tugarinovite

| category = Oxide mineral

| formula = MoO₂

| IMAsymbol = Tug{{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}}

| strunz = 4.DB.05

| dana =

| system = Monoclinic

| class = Prismatic H-M symbol (2/m)

| symmetry = P2₁/c (no. 14)

| unit cell = a = 5.6 Å, b = 4.85 Å, c = 5.53 Å; β = 119.37°

| color = Dark lilac-brown

| habit = Crystals are tabular striated prisms

| twinning = Polysynthetic

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| mohs = 4.6

| luster = Greasy to metallic

| streak = Greenish gray

| diaphaneity = Semitransparent

| gravity = 6.58 (calculated)

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| opticalprop = Biaxial

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| pleochroism = Light gray to dark pink; pale yellow to bluish olive-brown in reflected light

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| references = [http://www.handbookofmineralogy.com/pdfs/tugarinovite.pdf Handbook of Mineralogy][https://www.mindat.org/min-4043.html Tugarinovite on Mindat.org][http://webmineral.com/data/Tugarinovite.shtml#.WPKok4jytPY Tugarinovite on Webmin]

}}

Tugarinovite is a rare molybdenum oxide mineral with formula MoO₂.

It occurs as a primary mineral phase associated with metasomatism in a sulfur deficient reducing environment. In the type locality it occurs with uraninite, molybdenite, galena, zircon and wulfenite.

Tugarinovite was first described for an occurrence in the Lenskoye molybdenum–uranium deposit in the Amurskaya Oblast, Far-Eastern Region, Russia. It was named for geochemist Ivan Alekseevich Tugarinov of the Vernadskii Institute in Moscow.

In addition to its type locality in Russia it has been reported from the Allende meteorite in Chihuahua, Mexico, the Nansei Archipelago of Japan and Bohemia in the Czech Republic.