Masuyite

{{Infobox mineral

| name = Masuyite

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| image = Masuyite-Uraninite-mun08rad-05b.jpg

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| caption = Orange Masuyite coating crystals of cubic uraninite (to about 1 cm). Shinkolobwe mine, the type locality, Democratic Republic of the Congo.

| category = Oxide minerals

| formula = Pb[(UO₂)₃O₃(OH)₂]·3H₂O

| IMAsymbol = Msy{{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}}

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| strunz = 4.GB.35

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| system = Monoclinic

| class = Domatic (m)
(same H-M symbol)

| symmetry = Pn

| unit cell = a = 13.98 Å, b = 12.11 Å,
c = 14.2 Å; Z = 2

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| opticalprop = Biaxial (-)

| refractive = n_α = 1.785 n_β = 1.895 n_γ = 1.915

| birefringence = δ = 0.130

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| 2V = Measured: 50°, calculated: 44°

| dispersion = extreme

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| other = 25px Radioactive

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

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Masuyite is a uranium/lead oxide mineral with formula Pb[(UO₂)₃O₃(OH)₂]·3H₂O.[http://www.webmineral.com/data/Masuyite.shtml Webmineral]

Masuyite was first described in 1947 for an occurrence in Katanga and named to honor Belgian geologist Gustave Masuy (1905–1945).[http://rruff.geo.arizona.edu/doclib/hom/masuyite.pdf Handbook of Mineralogy]