Masuyite Knowpia

Masuyite
Masuyite
	Orange Masuyite coating crystals of cubic uraninite (to about 1 cm). Shinkolobwe mine, the type locality, Democratic Republic of the Congo.
General
Category	Oxide minerals
Formula; (repeating unit)	Pb[(UO2)3O3(OH)2]·3H2O
IMA symbol	Msy
Strunz classification	4.GB.35
Crystal system	Monoclinic
Crystal class	Domatic (m) ; (same H-M symbol)
Space group	Pn
Unit cell	a = 13.98 Å, b = 12.11 Å, ; c = 14.2 Å; Z = 2
Identification
Optical properties	Biaxial (-)
Refractive index	nα = 1.785 nβ = 1.895 nγ = 1.915
Birefringence	δ = 0.130
2V angle	Measured: 50° , calculated: 44°
Dispersion	extreme
Other characteristics	Radioactive
References	Masuyite on Mineralienatlas

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]

References edit

^ 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.
^ Mineralienatlas
^ Webmineral
^ Handbook of Mineralogy