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Calciosamarskite (Calciosamarskit)

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Calciosamarskit
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Calciosamarskit
schwarzbraune, glasige Masse von Calciosamarskit, Mitchell County, North Carolina, USA; BB ~ 1 cm
Copyright: Joy Desor; Contribution: openpit
Location: USA/North Carolina/Mitchell Co.
Mineral: Calciosamarskite
Image: 1592748473
License: Usage for Mineralienatlas project only
Calciosamarskit

schwarzbraune, glasige Masse von Calciosamarskit, Mitchell County, North Carolina, USA; BB 1 cm

Copyright: Joy Desor
Contribution: openpit 2020-06-21
Locality: Mitchell Co. / North Carolina / USA

Collectors Summary

Color schwarz
Streak color braunschwarz
Hardness (Mohs) 5.00 - 6.00
Cleavages keine
Fracture unregelmäßig bis muschelig
Crystal System monoklin,

Chemism

Chemical formula

(Ca,Fe,Y)(Nb,Ta,Ti)O4

Empirical formula (analysis)

(Ca0.31Y0.17Fe2+0.26U0.19Na0.08REE0.23)1.24(Nb0.79Ta0.07Ti0.04)0.90O4

Chemical composition

Calcium, Eisen, Niob, Tantal, Titan, Yttrium, Sauerstoff

Unit weight: 294.75807168024 u; Number of atoms in the formula: 6.3476

Info

Empirical formula:

(Ca0.31Y0.17Fe0.26U0.19Na0.08REE0.23)1.24(Nb0.79Ta0.07Ti0.04)0.90O4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

21.71

4

63.02

15.9994300

63.9977200

Sodium

Na

0.77

0.1

1.56

22.9897702

2.2805852

Calcium

Ca

5.23

0.38

6.06

40.0784000

15.4061370

Titanium

Ti

0.58

0.04

0.57

47.8671000

1.7232156

Iron

Fe

6.11

0.32

5.08

55.8452000

18.0044925

Yttrium

Y

6.36

0.21

3.32

88.9058520

18.7413536

Niobium

Nb

22.41

0.71

11.20

92.9063820

66.0564376

Rare Earth

REE

13.93

0.29

4.49

144.0000000

41.0688000

Tantalum

Ta

3.87

0.06

0.99

180.9479100

11.3997183

Uranium

U

19.03

0.24

3.71

238.0289130

56.0796119

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.19-055

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

Classification by Hölzel

4.DH.180

4: OXIDES
D: Dioxides
H: Wolframite-Group

IMA status

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Columbite supergroup  ⇒ Samarskite group

Optical Properties

Color

schwarz

Streak color

braunschwarz

Crystallography

Crystal System

monoklin

Cell parameters a (Å)

5.632

Cell parameters b (Å)

9.912

Cell parameters c (Å)

5.221

Cell parameters a/b or c/a

0.568

Cell parameters c/b

0.527

Cell parameters α

90°

Cell parameters β

93.87

Cell parameters γ

90°

Z

4

Volume (ų)

290.795

X-Ray Powder Diffraction

3.687(30),
3.614(20),
3.079(90),
2.952(100),
2.824(30),
2.599(30),
1.839(20),
1.472(20)

XRD chart Calciosamarskite

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

Physical Properties

Hardness (Mohs)

5.00 - 6.00

VHN (Hardness Vickers)

960 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

5.8 (gemessen)

6.732 ( ρ calc. Mineralienatlas )

Cleavages

keine

Fracture

unregelmäßig bis muschelig

Preface

Author (Name, Year)

Ellsworth, 1928

References

Ellsworth - American Mineralogist 13 (1928), 63, 66.

Palache, Charles, Harry Berman & Clifford Frondel -The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged (1944) 772

Hanson, S.L., Simmons, W.B., Falster, A.U., Foord, E.E., Litche, F.E. - Mineralogical Magazine 63 (1999), 27-36

IMA group assignments

Other languages

German

Calciosamarskit

Spanish

Calciosamarskita

English

Calciosamarskite

French

Calciosamarskite

Russian

Кальциосамарскит

Alternative Name

Japanese

カルシオサマルスキー石

CNMNC symbol

Symbol

Csmk

Locations with GPS information

IDs

GUSID (Global unique identifier short form) yFTA6hmEtEeWR6MSdqI8Zg
GUID (Global unique identifier) EAC054C8-8419-47B4-9647-A31276A23C66
Database ID 569