Masuyite
Orange Masuyite coating crystals of cubic uraninite (to about 1 cm). Shinkolobwe mine, the type locality, Democratic Republic of the Congo.
General
CategoryOxide minerals
Formula
(repeating unit)
Pb[(UO2)3O3(OH)2]·3H2O
IMA symbolMsy[1]
Strunz classification4.GB.35
Crystal systemMonoclinic
Crystal classDomatic (m)
(same H-M symbol)
Space groupPn
Unit cella = 13.98 Å, b = 12.11 Å,
c = 14.2 Å; Z = 2
Identification
Optical propertiesBiaxial (-)
Refractive indexnα = 1.785 nβ = 1.895 nγ = 1.915
Birefringenceδ = 0.130
2V angleMeasured: 50° , calculated: 44°
Dispersionextreme
Other characteristics Radioactive
ReferencesMasuyite on Mineralienatlas[2]

Masuyite is a uranium/lead oxide mineral with formula Pb[(UO2)3O3(OH)2]·3H2O.[3]

Masuyite was first described in 1947 for an occurrence in Katanga and named to honor Belgian geologist Gustave Masuy (1905–1945).[4]

See also

References

  1. Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  2. Mineralienatlas
  3. Webmineral
  4. Handbook of Mineralogy
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