• Samarskite-(Yb) Mineral Data

    webmineral.com/data/Samarskite-(Yb).shtml Samarskite-(Yb) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram. Greater than 70 Bq / gram. Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 10 cm box) 34.51 ± 8.63 grams of pure Samarskite-(Yb) .
  • Samarskite-(Y) - Wikipedia

    en.wikipedia.org/wiki/Samarskite Samarskite is a radioactive rare earth mineral series which includes samarskite-(Y) with formula: (YFe 3+ Fe 2+ U,Th,Ca) 2 (Nb,Ta) 2 O 8 and samarskite-(Yb) with formula (YbFe 3+) 2 (Nb,Ta) 2 O 8. The formula for samarskite-(Y) is also given as: (Y,Fe 3+,U)(Nb,Ta)O 4.. Samarskite crystallizes in the orthorhombic - dipyramidal class as black to yellowish brown stubby prisms although it is ...
  • Minerals : Samarskite-(Yb)

    www.mindat.org/mesg-466174.html If samarskite-(Yb) turns out to be true then I suppose it should be the exactly Yb-dominant analogue of samarskite-(Y) (and calciosamarskite the Ca-dominant one of both). 28th Jun 2019 21:42 BST Łukasz Kruszewski Expert
  • Samarskite-(Yb) Image

    webmin.mindat.org/specimens/picshow.php Black samarskite-(Yb) on matrix. 1.0 Ga Pikes Peak batholith, Little Patsy pegmatite, South Platte Pegmatite district, Jefferson County, Colorado, U.S.A..
  • (PDF) Samarskite-(Yb): A new species of the samarskite ...

    www.researchgate.net/.../250273769_Samarskite-Yb_A_new_species_of_the_samarsk... Samarskite-(Yb) is black with a brown to black streak, and isotropic with an index of refraction greater than 2.1. It is brittle with a hardness of between 5 and 6. It exhibits a vitreous luster ...
  • (PDF) SAMARSKITE-(YB): A NEW MINERAL INDICATING EXTREME ...

    www.researchgate.net/.../258357271_SAMARSKITE-YB_A_NEW_MINERAL_INDICATING_EXT... La samarskite-(Yb) est noire avec une rayure brune à noire, et isotrope, avec un indice de réfraction supérieur à 2.1. Elle est cassante, et sa dureté est entre 5 et 6 sur l’échelle de Mo hs.
  • SAMARSKITE-(Yb): A NEW SPECIES OF THE SAMARSKITE GROUP ...

    rruff.info/rruff_1.0/uploads/CM44_1119.pdf Samarskite-(Yb) occurs at the Little Patsy NYF-type granitic pegmatite in the South Platte district, Jefferson County, Colo-rado as black, metamict, anhedral masses up to tens of centimeters across that are intimately intergrown with ferrocolumbite and zircon. It occurs in late-stage replacement units at the core–margin contact within the ...
  • Samarskite-(Y) - TrekGEO

    trekgeo.net/m/d/samarskiteYe.htm [ Top] [ Japanese] Samarskite-(Y) Year of discovery: 1847 (Blyumovskaya pit, Ilmen Natural Reserve, Russia), 1922 (Japan) Locality list: 67 localities of samarskite-(Y) Y 2 Nb 2 O 8 (Y,Fe,U,Th,Ca) 2 (Nb,Ta) 2 O 8 [Y 3+ 2][(NbO 4) 2] 6-; Class: Samarskite group Class: Niobate Soluble in: HCl (Slightly) Radioactive: Very strong; Polymorph: Fergusonite-(Y) (Tetragonal), β-Fergusonite-(Y ...
  • URANINITE & OTHER RADIOACTIVE MINERALS

    www.minresco.com/radioactive/radioactive09.htm Samarskite-(Yb) was identified as a new species, and a new member of the Samarskite group, from the Little Patsy Pegmatite. It occurs as black, vitreous luster, metamict, anhedral masses with a conchoidal fracture, sometimes intergrown with / associated with Ferrocolumbite and Zircon Var. Cyrtolite.
  • dict.cc dictionary :: Yb :: English-German translation

    www.dict.cc/english-german/Yb.html dict.cc English-German Dictionary: Translation for Yb. English-German online dictionary developed to help you share your knowledge with others.