• Samarskite-(Yb): Mineral information, data and localities.

    www.mindat.org/min-27449.html after the samarskite-(Y) redefinition (Britvin et al., 2019), with Fe as an essential and not substituting element, and considering data of Kjellman (2017), samarskite-(Yb) may either be a questionable species or a species stoichiometrically unrealated to samarskite-(Y)
  • 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 ...
  • Samarskite-(Yb) Mineral Data

    webmineral.com/data/Samarskite-(Yb).shtml Concentration of Samarskite-(Yb) per GRapi unit =1,134.54 (PPB) Samarskite-(Yb) is Radioactive as defined in 49 CFR 173.403. 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): Mineral information, data and localities.

    www.mindat.org/min-3512.html Samarskite Group. The Y analogue of Samarskite-(Yb). Due to cation ordering Fe is written separately in the formula; it is an essential cation. "...first example of cation-ordered niobate structurally related to layered double tungstates AMW 2 O 8 ". The framework of samarskite-(Y) is pseudo-layered and is related to that of "wolframite" via Nb-for-W substitution with a simultaneous ...
  • SAMARSKITE-(Yb): A NEW SPECIES OF THE SAMARSKITE GROUP ...

    rruff.info/rruff_1.0/uploads/CM44_1119.pdf SAMARSKITE-(Yb) FROM THE LITTLE PATSY GRANITIC PEGMATITE, COLORADO 1121 samarskite converts to a high-temperature (monoclinic) form, the conversion occurring at 950ºC. This distor-tion to a monoclinic structure is apparently due to an ordering phenomenon, which produces a doubled
  • 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.
  • (PDF) Samarskite-(Yb): A new species of the samarskite ...

    www.researchgate.net/.../250273769_Samarskite-Yb_A_new_species_of_the_samarsk... Samarskite-(Yb) occurs at the Little Patsy NYF-type granitic pegmatite in the South Platte district, Jefferson County, Colorado as black, metamict, anhedral masses up to tens of centimeters across ...
  • (PDF) SAMARSKITE-(YB): A NEW MINERAL INDICATING EXTREME ...

    www.researchgate.net/.../258357271_SAMARSKITE-YB_A_NEW_MINERAL_INDICATING_EXT... samarskite-(yb): a new mineral indicating extreme hree enrichment in the south platte nyf pegmatite district, colorado Conference Paper (PDF Available) · January 2004 with 73 Reads How we measure ...
  • Vassili Samarsky-Bykhovets - Wikipedia

    en.wikipedia.org/wiki/Vassili_Samarsky-Bykhovets Vasili Yevgrafovich Samarsky-Bykhovets (Russian: Василий Евграфович Самарский-Быховец; November 7, 1803 – May 31, 1870) was a Russian mining engineer and the chief of Russian Mining Engineering Corps between 1845 and 1861. The mineral samarskite (samarskite-Y, samarskite-Yb and calciosamarskite), and chemical element samarium are named after him.
  • Samarskite-(Y) Mineral Data

    webmineral.com/data/Samarskite-(Y).shtml [Content and History] [Recent Issues] [Back Issues] [Subscriptions] See Also: [Diamond Crystals] [Excalibur Minerals] [Hudson Institute] [Minerals on CDROM] Mineral News was founded some twenty years ago and has developed a following of avid mineral collectors seeking timely information about new finds and other items of interest to the collector community.