Canary yellow, lemon-yellow; greenish yellow (upon exposure to sunlight)
Crystal habit
Platy crystals often in radiating sprays, coatings, massive
Cleavage
Perfect on {001}, micaceous; distinct on {100} & {010}
Mohs scale hardness
1+1⁄2 – 2
Lustre
Adamantine, waxy, pearly on {101}, dull
Streak
Yellow
Diaphaneity
Translucent to opaque
Specific gravity
3.57 – 4.35
Optical properties
Biaxial (−)
Refractive index
nα = 1.675 nβ = 1.860 – 1.870 nγ = 1.885 – 1.895
Birefringence
0.210 – 0.220
Pleochroism
weak: X = nearly colourless, Y = pale canary yellow, Z = canary yellow
2V angle
30° to 45°
Dispersion
none
Other characteristics
Radioactive
References
[2][3][4][5]
Tyuyamunite (pronounced tuh-YOO-ya-moon-ite) is a very rare uranium mineral with formula Ca(UO2)2V2O8·(5–8)H2O. It is a member of the carnotite group. It is a bright, canary-yellow color because of its high uranium content. Also, because of tyuyamunite's high uranium content, it is radioactive.[6] It was named by Konstantin Avtonomovich Nenadkevich, in 1912, after its type locality, Tyuya-Muyun, Fergana Valley, Kyrgyzstan.[3]
Tyuyamunite (pronounced tuh-YOO-ya-moon-ite) is a very rare uranium mineral with formula Ca(UO2)2V2O8·(5–8)H2O. It is a member of the carnotite group...
species exist, including: margaritasite ((Cs,K,H3O)2(UO2)(VO4)2·H2O) and tyuyamunite, (Ca(UO2)2(VO4)2·5-8H2O). Earth sciences portal List of minerals List...
Tungsten Tungstite Tuperssuatsiaite Turquoise Tusionite Tyrolite Tyrrellite Tyuyamunite Varieties that are not valid species: Tanzanite (variety of zoisite)...
minerals can be found in various deposits. These include carnotite, tyuyamunite, torbernite and autunite. The davidite-brannerite-absite type uranium...
Francevillite is a uranyl-group vanadate mineral in the tyuyamunite series. Its chemical formula is (Ba,Pb)(UO2)2V2O8·5(H2O). Francevillite is a strongly...
exposure at Cement in Caddo County. The uranium occurred as carnotite and tyuyamunite in fracture fillings in the Rush Springs Sandstone over the Cement anticline...
are uraninite and coffinite in unoxidized sandstone, and carnotite and tyuyamunite in oxidized sandstone. Gangue minerals in unoxidized deposits are pyrite...
vanadium content, the only economic ore minerals were carnotite and tyuyamunite. Following World War II buying for nuclear weapons programs made uranium...
with schrockingerite and gypsum in the Hideout mine in Utah; and with tyuyamunite, uranophane, liebigite and carnotite in the Powder River Basin in Wyoming...
sedimentary rocks, where it occurs with corvusite, hewettite, carnotite and tyuyamunite. Roecoelite is considered a gangue mineral of no value when found with...
and closed in 1952. The ore consisted of the uranium-vanadium minerals tyuyamunite, metatyuyamunite, and carnotite, along with the copper minerals covellite...
Global Information
Radioactive