Samarskite-(Yb)
A valid IMA mineral species
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About Samarskite-(Yb)
Formula:
YbFe3+(Nb,Ta)2O8
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 unrelated to samarskite-(Y).
Colour:
Black
Lustre:
Vitreous
Hardness:
5 - 6
Specific Gravity:
7.03
Crystal System:
Monoclinic
Member of:
Name:
Named for being the Yb analogue of samarskite-(Y).
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)'.
One of just a few known Yb-dominant minerals, the other being keiviite-(Yb), hingganite-(Yb), xenotime-(Yb), and 'hellandite-(Yb)'.
Unique Identifiers
Mindat ID:
27449
Long-form identifier:
mindat:1:1:27449:8
GUID
(UUID V4):
(UUID V4):
275570a5-89cf-408b-8e2b-9981ee9ee5ed
Classification of Samarskite-(Yb)
Approved
Approval year:
2004
4.DB.25
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
B : With medium-sized cations; chains of edge-sharing octahedra
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
B : With medium-sized cations; chains of edge-sharing octahedra
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Smk-Yb | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Samarskite-(Yb)
Vitreous
Transparency:
Opaque
Colour:
Black
Comment:
Nearly opaque.
Streak:
Brown to black
Hardness:
5 - 6 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
7.03(1) g/cm3 (Measured) 7.079 g/cm3 (Calculated)
Comment:
Measured density: unheated sample; calculated one: basing on the empirical formula.
Optical Data of Samarskite-(Yb)
Type:
Isotropic
RI values:
n = > 2.1
Birefringence:
Isotropic minerals have no birefringence
Surface Relief:
Moderate
Chemical Properties of Samarskite-(Yb)
Formula:
YbFe3+(Nb,Ta)2O8
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 unrelated to samarskite-(Y).
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 unrelated to samarskite-(Y).
IMA Formula:
YbNbO4
Idealised Formula:
(Yb,Ln,U,Th,Ca)(Nb,Ta)2O8
Common Impurities:
U,Th,Ca,Fe(II),Ta,Er,Y,Dy
Crystallography of Samarskite-(Yb)
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P2/b
Setting:
P2/c
Cell Parameters:
a = 5.688(9) Å, b = 9.915(2) Å, c = 5.199(9) Å
β = 93.16(10)°
β = 93.16(10)°
Ratio:
a:b:c = 0.574 : 1 : 0.524
Unit Cell V:
292.76 ų
Z:
4
Twinning:
Not observed.
Comment:
Must have been heated to restore the structure; the above parameters are after heating to 1100oC for 12 hours.
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.664 Å | (21) |
3.086 Å | (25) |
2.981 Å | (100) |
1.895 Å | (12) |
1.865 Å | (20) |
1.769 Å | (15) |
1.746 Å | (12) |
1.587 Å | (20) |
Comments:
From type description (heated sample).
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 4b: Highly evolved igneous rocks | >3.0 |
34 : Complex granite pegmatites |
Type Occurrence of Samarskite-(Yb)
General Appearance of Type Material:
Anhedral metamict masses, up to tens of centimeters in size, intergrown with columbite-(Fe) and zircon.
Place of Conservation of Type Material:
National Museum of Natural History (Smithsonian Institution_, Washington, D.C., USA, number NMNH 174442.
Geological Setting of Type Material:
Late-stage replacement units at the contact between core and margin of a pegmatite.
Associated Minerals at Type Locality:
Synonyms of Samarskite-(Yb)
Other Language Names for Samarskite-(Yb)
German:Samarskit-(Yb)
Japanese:イテルビウムサマルスキー石
Relationship of Samarskite-(Yb) to other Species
Member of:
Other Members of this group:
Calciosamarskite | (Ca,U4+)Fe3+(Nb,Ta,Ti)2O8 | Orth. mmm (2/m 2/m 2/m) |
Ishikawaite | U4+Fe2+Nb2O8 | Mon. |
Samarskite-(Y) | YFe3+Nb2O8 | Mon. 2/m : P2/b |
Shakhdaraite-(Y) | ScYNb2O8 | Mon. 2/m : P2/b |
Srilankite | ZrTi2O6 | Orth. mmm (2/m 2/m 2/m) : Pbcn |
Yttrotantalite-(Y) | (Y,U,Fe2+)(Ta,Nb)(O,OH)4 | Orth. |
Common Associates
Associated Minerals Based on Photo Data:
2 photos of Samarskite-(Yb) associated with Columbite-(Fe) | Fe2+Nb2O6 |
Related Minerals - Strunz-mindat Grouping
4.DB. | Nioboheftetjernite | ScNbO4 | Mon. 2/m : P21/b |
4.DB. | Shakhdaraite-(Y) | ScYNb2O8 | Mon. 2/m : P2/b |
4.DB. | Nioboixiolite-(Mn2+) | (Nb0.67Mn2+0.33)O2 | Orth. mmm (2/m 2/m 2/m) : Pbcn |
4.DB. | Nioboixiolite-([]) | (Nb0.8◻0.2)4+O2 | Orth. mmm (2/m 2/m 2/m) : Pbcn |
4.DB.05 | Argutite | GeO2 | Tet. 4/mmm (4/m 2/m 2/m) : P42/mnm |
4.DB.05 | Cassiterite | SnO2 | Tet. 4/mmm (4/m 2/m 2/m) : P42/mnm |
4.DB.05 | Plattnerite | PbO2 | Tet. 4/mmm (4/m 2/m 2/m) : P42/mnm |
4.DB.05 | Pyrolusite | Mn4+O2 | Tet. 4/mmm (4/m 2/m 2/m) : P42/mnm |
4.DB.05 | Rutile | TiO2 | Tet. 4/mmm (4/m 2/m 2/m) : P42/mnm |
4.DB.05 | Tripuhyite | Fe3+Sb5+O4 | Tet. 4/mmm (4/m 2/m 2/m) : P42/mnm |
4.DB.05 | Tugarinovite | MoO2 | Mon. 2/m : P21/b |
4.DB.05 | Varlamoffite | (Sn,Fe)(O,OH)2 | |
4.DB.10 | Byströmite | MgSb2O6 | Tet. 4/mmm (4/m 2/m 2/m) : P4/nmm |
4.DB.10 | Tapiolite-(Fe) | Fe2+Ta2O6 | Tet. 4/mmm (4/m 2/m 2/m) : P42/mnm |
4.DB.10 | Tapiolite-(Mn) | Mn2+Ta2O6 | Tet. 4/mmm (4/m 2/m 2/m) : P42/mnm |
4.DB.10 | Ordoñezite | ZnSb2O6 | Tet. 4/mmm (4/m 2/m 2/m) : P42/mnm |
4.DB.10 | Tredouxite | NiSb2O6 | Tet. 4/mmm (4/m 2/m 2/m) : P42/mnm |
4.DB.15b | Akhtenskite | ε-Mn4+O2 | Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc |
4.DB.15c | Nsutite | (Mn4+,Mn2+)(O,OH)2 | Hex. |
4.DB.15a | Paramontroseite | V4+O2 | Orth. mmm (2/m 2/m 2/m) |
4.DB.15a | Ramsdellite | Mn4+O2 | Orth. mmm (2/m 2/m 2/m) |
4.DB.20 | Scrutinyite | α-PbO2 | Orth. mmm (2/m 2/m 2/m) : Pbcn |
4.DB.25 | Ishikawaite | U4+Fe2+Nb2O8 | Mon. |
4.DB.25 | Samarskite-(Y) | YFe3+Nb2O8 | Mon. 2/m : P2/b |
4.DB.25 | Srilankite | ZrTi2O6 | Orth. mmm (2/m 2/m 2/m) : Pbcn |
4.DB.25 | Yttrocolumbite-(Y) | Y(U4+,Fe2+)Nb2O8 | |
4.DB.25 | Calciosamarskite | (Ca,U4+)Fe3+(Nb,Ta,Ti)2O8 | Orth. mmm (2/m 2/m 2/m) |
4.DB.25 | Ixiolite-(Fe2+) | (Ta0.67Fe2+0.33)O2 | Orth. |
4.DB.25 | Ixiolite-(Mn2+) | (Ta0.67Mn2+0.33)O2 | Orth. |
4.DB.30 | Ferberite | FeWO4 | Mon. 2/m : P2/b |
4.DB.30 | Hübnerite | MnWO4 | Mon. 2/m : P2/b |
4.DB.30 | Sanmartinite | (Zn,Fe)WO4 | Mon. 2/m : P21/b |
4.DB.30 | Krasnoselskite | CoWO4 | Mon. |
4.DB.30 | Heftetjernite | ScTaO4 | Mon. 2/m : P2/b |
4.DB.30 | Huanzalaite | MgWO4 | Mon. 2/m : P2/b |
4.DB.30 va | Wolframite Group | ||
4.DB.30 | Rossovskyite | (Fe3+,Ta)(Nb,Ti)O4 | Mon. 2/m : P2/b |
4.DB.35 | Columbite-(Fe) | Fe2+Nb2O6 | Orth. mmm (2/m 2/m 2/m) : Pbcn |
4.DB.35 | Tantalite-(Fe) | Fe2+Ta2O6 | Orth. mmm (2/m 2/m 2/m) : Pbcn |
4.DB.35 | Columbite-(Mn) | Mn2+Nb2O6 | Orth. mmm (2/m 2/m 2/m) : Pbcn |
4.DB.35 | Tantalite-(Mn) | Mn2+Ta2O6 | Orth. mmm (2/m 2/m 2/m) : Pbcn |
4.DB.35 | Columbite-(Mg) | (Mg,Fe,Mn)(Nb,Ta)2O6 | Orth. |
4.DB.35 | Qitianlingite | (Fe,Mn)2(Nb,Ta)2WO10 | Orth. mmm (2/m 2/m 2/m) |
4.DB.35 | Tantalite-(Mg) | (Mg,Fe2+)(Ta,Nb)2O6 | Orth. mmm (2/m 2/m 2/m) : Pbcn |
4.DB.40 | Ferrowodginite | Fe2+Sn4+Ta2O8 | Mon. 2/m : B2/b |
4.DB.40 | Lithiotantite | LiTa3O8 | Mon. 2/m : P21/b |
4.DB.40 | Lithiowodginite | LiTa3O8 | Mon. 2/m : B2/b |
4.DB.40 | Titanowodginite | Mn2+TiTa2O8 | Mon. 2/m : B2/b |
4.DB.40 | Wodginite | Mn2+Sn4+Ta2O8 | Mon. 2/m : B2/b |
4.DB.40 | Ferrotitanowodginite | Fe2+TiTa2O8 | Mon. 2/m : B2/b |
4.DB.40 | Tantalowodginite | (Mn2+0.5◻0.5)TaTa2O8 | Mon. 2/m : B2/b |
4.DB.40 | Wolframowodginite | Mn(Mn,Sn,Fe,Ta)(W,Ta,Nb)2O8 | |
4.DB.45 | Tivanite | V3+TiO3(OH) | Mon. 2/m : P21/b |
4.DB.50 | Carmichaelite | (Ti,Cr,Fe)[O2-x(OH)x] | Mon. 2/m : P21/b |
4.DB.55 | Alumotantite | AlTaO4 | Orth. mmm (2/m 2/m 2/m) : Pbcn |
4.DB.60 | Biehlite | ((Sb,As)O)2[MoO4] | Mon. 2/m : B2/b |
Fluorescence of Samarskite-(Yb)
Non-fluorescent
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Samarskite-(Yb)
mindat.org URL:
https://www.mindat.org/min-27449.html
Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Samarskite-(Yb)
Reference List:
Localities for Samarskite-(Yb)
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
USA (TL) | |
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Little Patsy pegmatite, South Platte Pegmatite Mining District, Jefferson County, Colorado, USA