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Samarskite-(Yb) (Samarskit-(Yb))

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Samarskit-(Yb)
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Samarskit-(Yb)
schwarzer, massiger Samarskit-(Yb) mit wenig Muskovit, South Platte Pegmatite, Jefferson County, Colorado, USA; BB ~ 3 cm
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: USA/Colorado/Jefferson Co./South Platte District
Mineral: Samarskite-(Yb)
Image: 1591973877
License: Usage for Mineralienatlas project only
Samarskit-(Yb)

schwarzer, massiger Samarskit-(Yb) mit wenig Muskovit, South Platte Pegmatite, Jefferson County, Colorado, USA; BB 3 cm
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-06-12
Locality: South Platte District / Jefferson Co. / Colorado / USA

Collectors Summary

Color schwarz
Lustre Glasglanz
Hardness (Mohs) 5.5
Cleavages keine
Fracture muschelig
Crystal System monoklin, P2/c

Chemism

Chemical formula

YbNbO4

Additional chem. information

Yb-dominiertes Analog von Samarskit

Chemical composition

Niob, Ytterbium, Sauerstoff

Unit weight: 329.947102 u; Number of atoms in the formula: 6

Info

Empirical formula:

YbNbO4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

19.40

4

66.67

15.9994300

63.9977200
Niobium

Nb

28.16

1

16.67

92.9063820

92.9063820
Ytterbium

Yb

52.45

1

16.67

173.0430000

173.0430000

Analysis wt%

WO3 : 2.96, Nb2O5 : 29.53, Ta2O5 : 15.13, TiO2 : 0.65, ZrO2 : 0.98, SnO2 : 0.54, FeO : 2.55, MnO : 1.02, ThO2 : 10.11, UO2 : 10.39, Nd2O3 : 0.64, Sm2O3 : 0.42, Gd2O3 : 0.55, Dy2O3 : 3.06, Ho2O3 : 0.59, Er2O3 : 3.40, Tm2O3 : 0.58, Yb2O3 : 5.78, Lu2O3 : 0.97, Y2O3 : 1.92, CaO : 2.11, Ln2O3 : 18.46 (Ref: Canadian Mineralogist 2006)

Strunz 9th edition incl. updates

4.DB.25

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
D: Metall: Sauerstoff = 1:2 und vergleichbare
B: Mit mittelgroßen [Kationen]: Ketten kantenverknüpfter Oktaeder
25:Samarskit-Gruppe

Lapis Classification

IV/D.19-058

IV: OXIDE
D: Oxide mit Verhältnis Metall : Sauerstoff = 1:2 (MO2 und verwandte Verbindungen)

Classification by Hölzel

4.DH.165

4: OXIDES
D: Dioxides
H: Wolframite-Group

Dana 8th edition

08.01.11.02

08: Multiple Oxides with Nb, Ta, and Ti
01: Multiple Oxides with Nb, Ta, and Ti where A BO4
11: Samarskite Group

IMA status

anerkannt 2004

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Columbite supergroup  ⇒ Samarskite group

Optical Properties

Color

schwarz

Diaphaneity (Transparency)

opak

Lustre

Glasglanz

RI value α / ω / n

> 2.1

Ri mean

> 2.1

2V angle

Biaxial

Anisotropism

Isotropisch

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

13

Space Group

P2/c

Cell parameters a (Å)

5.688

Cell parameters b (Å)

9.915

Cell parameters c (Å)

5.199

Cell parameters a/b or c/a

0.574

Cell parameters c/b

0.524

Cell parameters α

90°

Cell parameters β

93.16°

Cell parameters γ

90°

Z

4

Volumne (ų)

292.76

X-Ray Powder Diffraction

3.664(21), 3.086(25), 2.981(100), 1.895(12), 1.865(20), 1.769(15), 1.746(12), 1.587(20)
XRD chart Samarskite-(Yb)

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

5.5

VHN (Hardness Vickers)

530 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

7.03 (gemessen)

7.485 ( ρ calc. Mineralienatlas )

Cleavages

keine

Fracture

muschelig

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

USA/Colorado/Jefferson Co./South Platte District/Little Patsy Pegmatite

Preface

Author (Name, Year)

Simmons & Hanson & Falster, 2006

References

HANSON, Sarah L., SIMMONS, William B., and FALSTER, Alexander U., (2004) SAMARSKITE-(YB): A NEW MINERAL INDICATING EXTREME HREE ENRICHMENT IN THE SOUTH PLATTE NYF PEGMATITE DISTRICT, COLORADO GSA 2004 Denver Annual Meeting (November 7–10, 2004) (in englisch)

Canadian Mineralogist 44 (2006), 1119

IMA group assignments

Other languages

German

Samarskit-(Yb)

English

Samarskite-(Yb)

Russian

Самарскит-(Yb)

Alternative Name

Japanese

イテルビウムサマルスキー石

CNMNC (IMA)-Number

IMA 2004-001

CNMNC symbol

Symbol

Smk-Yb

Locations with GPS information