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Samarskite-(Y)

Rare earth oxide mineral

Samarskite-(Y)

Rare earth oxide mineral

FieldValue
name**Samarskite-(Y)**
categoryOxide minerals
boxbgcolor#6a6750
boxtextcolor#fff
imageSamarskite-(Y)-351417.jpg
formula
IMAsymbolSmk-Y
strunz4.DB.25
systemOrthorhombic
classDipyramidal (mmm)
H-M symbol: (2/m 2/m 2/m)
symmetry*Pbcn*
unit cella = 5.687 Å, b = 4.925 Å
c = 5.21 Å; Z = 2
colorBlack, may have a brownish tint, brown to yellowish brown due to alteration; light to dark brown in transmitted light
habitCrystals elongated with pyramidal terminations; commonly granular to massive
cleavage{010}, indistinct
fractureConchoidal fragments
tenacityBrittle
mohs5–6
lusterVitreous – resinous
refractiven = 2.1–2.2
opticalpropAppears isotropic
streakReddish brown
density5.6 – 5.8, Average = 5.69
diaphaneityOpaque, transparent in thin fragments
other[[Image:Radioactive.svg25px]] Radioactive (Greater than 70 Bq / gram)
alterationMetamict
references

H-M symbol: (2/m 2/m 2/m) c = 5.21 Å; Z = 2

Samarskite is a radioactive rare earth mineral series which includes samarskite-(Y), with the chemical formula and samarskite-(Yb), with the chemical formula . The formula for samarskite-(Y) is also given as .

Samarskite crystallizes in the orthorhombic – dipyramidal class as black to yellowish brown stubby prisms although it is typically found as anhedral masses. Specimens with a high uranium content are typically metamict and appear coated with a yellow brown earthy rind.

Samarskite occurs in rare earth bearing granite pegmatites with other rare minerals. It occurs in association with columbite, zircon, monazite, uraninite, aeschynite, magnetite, albite, topaz, beryl, garnet, muscovite and biotite.

Samarskite was first described in 1847 for an occurrence in Miass, Ilmen Mountains, Southern Ural Mountains of Russia. The chemical element samarium was first isolated from a specimen of samarskite in 1879. Samarium was named after samarskite which was named for the Russian mine official, Colonel Vasili Samarsky-Bykhovets (1803–1870).

Samarskite-(Yb) was first described in 2004 for an occurrence in the South Platte Pegmatite District, Jefferson County, Colorado.

Samarskite specimen, broken to show fresh surface

References

References

  1. Warr, L.N.. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine.
  2. link. (2019-08-11 Mineralienatlas)
  3. link. (2011-05-14 Webminerals)
  4. "Mindat Samarskite-(Y)".
  5. "Mindat Samarskite-(Yb)".
  6. "Handbook of Mineralogy".
  7. "Samarskite-(Yb) on Webmineral".
Info: Wikipedia Source

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uranium(iii)-minerals yttrium-minerals lanthanide-minerals iron(ii,iii)-minerals niobium-minerals tantalum-minerals oxide-minerals orthorhombic-minerals minerals-in-space-group-60 thorium-minerals
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