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Västmanlandite-(Ce)

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Västmanlandit-(Ce)
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Västmanlandit-(Ce)
Malmkärra Grube, Norberg, Västmanland, Schweden. Grau. 4 cm.
Copyright: Doc Diether; Contribution: Doc Diether
Collection: Doc Diether
Location: Schweden/Västmanlands, Provinz/Norberg/Malmkärra-Gruben
Mineral: Västmanlandite-(Ce)
Image: 1216631178
Rating: 3.5 (votes: 2)
License: Usage for Mineralienatlas project only
Västmanlandit-(Ce)

Malmkärra Grube, Norberg, Västmanland, Schweden. Grau. 4 cm.

Collection: Doc Diether
Copyright: Doc Diether
Contribution: Doc Diether 2008-07-21
Locality: Malmkärra-Gruben / Norberg / Västmanlands, Provinz / Schweden

Collectors Summary

Color dunkelbraun
Streak color gelblichgrau
Lustre Glasglanz
Hardness (Mohs) 6
Cleavages gut parallel zu {001}
Fracture uneben bis muschelig
Solubility - kalte konz. HCl, HNO3
Crystal System monoklin, P21/m

Chemism

Chemical formula

Ce3CaMg2Al2Si5O19(OH)2F

Chemical composition

Aluminium, Calcium, Cerium, Magnesium, Silicium, Fluor, Sauerstoff, Wasserstoff

Unit weight: 1060.42987365 u; Number of atoms in the formula: 37

Info

Empirical formula:

Ce3CaMg2Al2Si5O19(OH)2F

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.19

2

5.41

1.0079470

2.0158940

Oxygen

O

31.68

21

56.76

15.9994300

335.9880300

Fluorine

F

1.79

1

2.70

18.9984033

18.9984033

Magnesium

Mg

4.58

2

5.41

24.3050600

48.6101200

Aluminium

Al

5.09

2

5.41

26.9815382

53.9630764

Silicon

Si

13.24

5

13.51

28.0855300

140.4276500

Calcium

Ca

3.78

1

2.70

40.0784000

40.0784000

Cerium

Ce

39.64

3

8.11

140.1161000

420.3483000

Strunz 9th edition incl. updates

9.BG.55

9: Silikate (Germanate)
B: Gruppensilikate (Sorosilikate)
G: Gruppen(Soro)-Silikate mit gemischten SiO4 und Si2O7 Gruppen; Kationen in oktahedraler [6] und größerer Koordination
55:

Lapis Classification

VIII/C.23-090

VIII: SILIKATE
C: Gruppensilikate
23: Mischstrukturen mit [SiO4] 4--Inseln und [Si2O7] 6--Gruppen; Epidot-Gruppe

Classification by Hölzel

9.BN.860

9: SILICATES
B: Sorosilicates
N: With SiO4 + Si2O7
8: Not classified

Dana 8th edition

58.02.01a.18

58: Sorosilicates Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups
02: Sorosilicates Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n=1,2)
01a: Epidote group (Clinozoisite subgroup)

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Epidote-törnebohmite polysomatic series
Gatelite supergroup  ⇒ Västmanlandite group

Optical Properties

Color

dunkelbraun

Streak color

gelblichgrau

Diaphaneity (Transparency)

durchscheinend

Lustre

Glasglanz

max. Birefringence

0.029

Birefringence chart\! Västmanlandite-(Ce) title=Birefringence chart Västmanlandite-(Ce)

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.781

RI value β

1.792

RI value γ / ε

1.810

Ri mean

1.794

2V angle

Biaxial (-) 75° (gemessen) 78° (berechnet)

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

11

Space Group

P21/m

Cell parameters a (Å)

8.939

Cell parameters b (Å)

5.706

Cell parameters c (Å)

15.885

Cell parameters a/b or c/a

1.567

Cell parameters c/b

2.784

Cell parameters α

90°

Cell parameters β

94.58°

Cell parameters γ

90°

Z

2

Volumne (ų)

807.642

X-Ray Powder Diffraction

15.81 (16),
4.65 (10),
3.50 (20),
2.983 (100),
2.685 (13),
2.678 (11),
2.625 (19),
2.187 (15)

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

6

VHN (Hardness Vickers)

730 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.51 (gemessen)

4.36 ( ρ calc. Mineralienatlas )

Cleavages

gut parallel zu {001}

Fracture

uneben bis muschelig

Instability

- kalte konz. HCl, HNO3

(Co-)Type locality

(Co-)Type locality

Schweden/Västmanlands, Provinz/Norberg/Malmkärra-Gruben

Type material

Swedish Museum of Natural History, Stockholm, Schweden

Preface

Associations

Fluorbritholith-(Ce)

Name from

Västmanland, dem Landkreis, wo die Mehrheit der Lagerstätten liegen

Author (Name, Year)

Holtstam, Kolitsch, Andersson (2004)

References

Holtstam D, Kolitsch U, Andersson U B - Västmanlandite-(Ce), a new lanthanide- and F-bearing sorosilicate mineral from Västmanland, Sweden: description, crystal structure, and relation to gatelite-(Ce), European Journal of Mineralogy 17 (2005), 129-141

American Mineralogist 90 (2005), 1948

Canadian Mineralogist 45 (2007), 1073

Grice J D, Ferraris G - New minerals approved in 2002 and nomenclature modifications approved 1998-2002 by the commission on new minerals and mineral names, International Mineralogical Association, American Mineralogist 88 (2003), 1620-1624

IMA group assignments

Other languages

German

Västmanlandit-(Ce)

English

Västmanlandite-(Ce)

Russian

Вестманландит-(Се)

CNMNC symbol

Symbol

Vml-Ce

Locations with GPS information