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Allanite-(Nd)

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Allanit-(Nd)
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Allanit-(Nd)
schwarze, stenglige Kristalle von Allanit-(Nd) mit beigem Feldspat, Åskagen Steinbruch, Persberg, Filipstad, Schweden; BB ~ 6 cm
Copyright: Joy Desor; Contribution: openpit
Location: Schweden/Värmland, Provinz/Filipstad, Gemeinde/Persberg/Åskagen-Pegmatit (Torskebäcken)
Mineral: Allanite-(Nd)
Image: 1581855509
License: Usage for Mineralienatlas project only
Allanit-(Nd)

schwarze, stenglige Kristalle von Allanit-(Nd) mit beigem Feldspat, Åskagen Steinbruch, Persberg, Filipstad, Schweden; BB 6 cm

Copyright: Joy Desor
Contribution: openpit 2020-02-16
Locality: Åskagen-Pegmatit (Torskebäcken) / Persberg / Filipstad, Gemeinde / Värmland, Provinz / Schweden

Collectors Summary

Crystal System monoklin, P21/m

Chemism

Chemical formula

CaNd(Al2Fe2+)(Si2O7)(SiO4)O(OH)

Additional chem. information

Epidot-Gruppe

Chemical composition

Aluminium, Calcium, Eisen, Neodymium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 587.3868034 u; Number of atoms in the formula: 22

Info

Empirical formula:

CaNd(Al2Fe)(Si2O7)(SiO4)O(OH)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.17

1

4.55

1.0079470

1.0079470

Oxygen

O

35.41

13

59.09

15.9994300

207.9925900

Aluminium

Al

9.19

2

9.09

26.9815382

53.9630764

Silicon

Si

14.34

3

13.64

28.0855300

84.2565900

Calcium

Ca

6.82

1

4.55

40.0784000

40.0784000

Iron

Fe

9.51

1

4.55

55.8452000

55.8452000

Neodymium

Nd

24.56

1

4.55

144.2430000

144.2430000

Analysis wt%

SiO2 : 30.69, Al2O3 : 17.36, FeO : 12.23, Nd2O3 : 28.64, CaO : 9.55, H2O : 1.53, Ln2O3 : 28.64 (Ref: berechnet)

Strunz 9th edition incl. updates

9.BG.05

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

Lapis Classification

VIII/C.23-045

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

Classification by Hölzel

9.BN.206

9: SILICATES
B: Sorosilicates
N: With SiO4 + Si2O7
2: Allanite-Group

IMA status

anerkannt, Jan. 2011 - CNMNC Newsletter No. 8, April 2011

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Epidote supergroup  ⇒ Allanite group

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

11

Space Group

P21/m

Cell parameters a (Å)

8.890

Cell parameters b (Å)

5.731

Cell parameters c (Å)

10.101

Cell parameters a/b or c/a

1.551

Cell parameters c/b

1.763

Cell parameters α

90°

Cell parameters β

115.17

Cell parameters γ

90°

Z

2

Volumne (ų)

465.767

Kristall structure

Struktur bestimmt

X-Ray Powder Diffraction

3.508(46), 2.893(100), 2.865(45), 2.698(60), 2.607(60), 2.164(35), 2.117(38), 1.659(43)

XRD chart Allanite-(Nd)

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

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

4.188 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Schweden/Värmland, Provinz/Filipstad, Gemeinde/Persberg/Åskagen-Pegmatit (Torskebäcken)

Type material

Sammlung des Department of Mineralogy and Petrology des Nationalmuseums in Prague, Tschechien

Collection number of type material

P1P 1/2010

Preface

Author (Name, Year)

Radek Škoda, Jan Cempírek, Jan Filip und Milan Novák (2010)

Safety Instructions

Industrial chemicals are often present in powder form and therefore often contain much higher dangers than natural, crystalline substances. These hazard statements refer to the classification of industrially used chemical compounds that may also occur in this natural mineral. The hazard classification makes no claim to completeness.




Safety classes: Ionizing radiation: Radioaktiv

References

CNMNC Newsletter No. 8, April 2011, page 291; Mineralogical Magazine, 75, 289-294.

IMA group assignments

Other languages

German

Allanit-(Nd)

English

Allanite-(Nd)

Russian

Алланит-(Nd)

Simplified Chinese

钕褐帘石

CNMNC (IMA)-Number

IMA 2010-060

CNMNC symbol

Symbol

Aln-Nd

Locations with GPS information