Samarskita

Structural context

Samarskite-(Y)
Crystal System monoclinicCrystal Class prismaticSpace Group P2/c

Chemical context

Stoichiometric formulas

Samarskite-(Y)
mindat.org
  • March 13, 2023YFe3+Nb2O8previously formulated as (Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8 (IMA proposal 19-J)
IMA
  • March 13, 2023YFe3+Nb2O8
mineralogy.rocks
  • Aug. 30, 2022YFe3+Nb5+2O8

Physical properties

ColorColor entities, recognized using a custom trained NER model
    • yellow-brown
    Color noteOriginal color note from the source
    Black internally, pale to yellow-brown surface
    StreakStreak entities, recognized using a custom trained NER model
    • dark reddish brown
      Streak noteOriginal streak note from the source
      Dark reddish brown to black
      Lustre
      Vitreous
      Resinous
      Sub-Metallic
      Fracture
      Conchoidal
      Sub-Conchoidal
      Tenacity
      brittle
      Hardness
      5—6
      Measured density
      5—5.69
      Calculated density
      6.28