Samarskite-(Yb)

Samarskite Group. The Yb analogue of Samarskite-(Y) (?). Unique combination of elements. One of just a few known Yb-dominant minerals, the other being keiviite-(Yb), hingganite-(Yb), xenotime-(Yb), and 'hellandite-(Yb)'.

History

Activities related to discovery and approval of the group members

Structural context

Samarskite-(Yb)
Crystal System monoclinicCrystal Class prismaticSpace Group P2/c
a5.688
b9.915
c5.199
alpha90
beta93.16
gamma90
volume292.76

Based on 1 measurements

Chemical context

Stoichiometric formulas

Samarskite-(Yb)
mindat.org
  • March 13, 2023YbFe3+(Nb,Ta)2O8after 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)
IMA
  • March 13, 2023YbNbO4
mineralogy.rocks
  • Aug. 30, 2022YbNb5+O4

Elements recorded on EPMA

1
Ca
1
Ce
1
Dy
1
Er
1
Fe
1
Gd
1
Ho
1
La
1
Lu
1
Mn
1
Nb
1
Nd
1
O
1
Pb
1
Pr
1
Sc
1
Si
1
Sm
1
Ta
1
Tb
1
Th
1
Ti
1
Tm
1
U
1
W
1
Y
1
Yb
1
Zr

Physical properties

ColorColor entities, recognized using a custom trained NER model
    Color noteOriginal color note from the source
    Black
    StreakStreak entities, recognized using a custom trained NER model
        Streak noteOriginal streak note from the source
        Brown to black
        Lustre
        Vitreous
        Fracture
        Conchoidal
        Transparency
        Opaque
        Tenacity
        brittle
        Hardness
        5—6
        Calculated density
        7.079