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Allanite-(Y) (Allanit-(Y))

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Allanit-(Y) (Bodenit)
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Allanit-(Y) (Bodenit)
Etwa cm-großer, undeutlicher dunkelbrauner Allanit-(Y)-Kristall ("Bodenit") in graugrünlichem Feldspat vom Kalkwerk Boden, Marienberg, Erzgebirge, Sachsen, Deutschland. Mit dazugehörigem Etikett von 1926.
Copyright: raritätenjäger; Contribution: raritätenjäger
Collection: raritätenjäger
Location: Deutschland/Sachsen/Erzgebirgskreis/Großrückerswalde/Boden
Mineral: Allanite-(Y)
Image: 1293457820
License: Usage for Mineralienatlas project only
Allanit-(Y) (Bodenit)

Etwa cm-großer, undeutlicher dunkelbrauner Allanit-(Y)-Kristall ("Bodenit") in graugrünlichem Feldspat vom Kalkwerk Boden, Marienberg, Erzgebirge, Sachsen, Deutschland. Mit dazugehörigem Etikett vo...

Collection: raritätenjäger
Copyright: raritätenjäger
Contribution: raritätenjäger 2010-12-27
Locality: Boden / Großrückerswalde / Erzgebirgskreis / Sachsen / Deutschland

Collectors Summary

Color braunschwarz
Streak color graubraun
Hardness (Mohs) 5.5
Solubility +++ HF, + konz. HCl, Hitze!
Crystal System monoklin, P21/m

Chemism

Chemical formula

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

Chemical composition

Aluminium, Calcium, Eisen, Silicium, Yttrium, Sauerstoff, Wasserstoff

Unit weight: 532.0496554 u; Number of atoms in the formula: 22

Info

Empirical formula:

CaY(Al2Fe)(Si2O7)(SiO4)O(OH)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.19

1

4.55

1.0079470

1.0079470

Oxygen

O

39.09

13

59.09

15.9994300

207.9925900

Aluminium

Al

10.14

2

9.09

26.9815382

53.9630764

Silicon

Si

15.84

3

13.64

28.0855300

84.2565900

Calcium

Ca

7.53

1

4.55

40.0784000

40.0784000

Iron

Fe

10.50

1

4.55

55.8452000

55.8452000

Yttrium

Y

16.71

1

4.55

88.9058520

88.9058520

Analysis wt%

SiO2 : 35.16, TiO2 : 2.12, ThO2 : 1.71, Al2O3 : 14.05, Fe2O3 : 5.98, Y2O3 : 6.28, Ce2O3 : 8.59, FeO : 7.90, MgO : 2.81, CaO : 9.57, Na2O : 0.73, K2O : 0.59, H2O : 4.08, Ln2O3 : 14.87 (Ref: Geochem.Int.64)

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.23-040

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

Classification by Hölzel

9.BN.205

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

Dana 8th edition

58.02.01a.03

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)

IMA status

Mit Anerkennung der CNMNC umbenannt

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Epidote supergroup  ⇒ Allanite group

Optical Properties

Color

braunschwarz

Streak color

graubraun

Diaphaneity (Transparency)

opak

max. Birefringence

0.02

Birefringence chart\! Allanite-(Y) title=Birefringence chart Allanite-(Y)

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

1.715 - 1.791

RI value β

1.718 - 1.815

RI value γ / ε

1.733 - 1.822

2V angle

Biaxial (-) 40° bis 80° (gemessen) 50° bis 56° (berechnet)

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

11

Space Group

P21/m

Cell parameters a (Å)

10.2

Cell parameters b (Å)

5.8

Cell parameters c (Å)

8.9

Cell parameters a/b or c/a

1.759

Cell parameters c/b

1.534

Cell parameters α

90°

Cell parameters β

115°

Cell parameters γ

90°

Z

2

Volumne (ų)

477.193

Kristall structure

die Gitterparameter sind nicht gesichert

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

5.5

Density (g/cm³)

3.8

3.703 ( ρ calc. Mineralienatlas )

Instability

+++ HF, + konz. HCl, Hitze!

Preface

Author (Name, Year)

Fersman, 1931

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

American Mineralogist 51 (1966), 152

Frondel, J.W. - Variation in some rare earths in allanite: American Mineralogist 49 (1964), 1159-1177

Dollase, W.A. - Refinement of the crystal structures of epidote, allanite and hancockite: American Mineralogist 56 (1971), 447-464

Ercit, T.S. - The mess that is “allanite”. Canadian Mineralogist 40 (2002), 1411-1419

IMA group assignments


 
 
{A12+A23+M13+M23+M32+}(Si2O7)(SiO4)O(OH)
monoklin
P21/m

 
 
 
CaCe(Al2Fe2+)(Si2O7)(SiO4)O(OH)
monoklin
P21/m

 
 
 
CaLa(Al2Fe2+)(Si2O7)(SiO4)O(OH)
monoklin
P21/m

 
 
 
CaNd(Al2Fe2+)(Si2O7)(SiO4)O(OH)
monoklin
P21/m

 
 
 
CaY(Al2Fe2+)(Si2O7)(SiO4)O(OH)
monoklin
P21/m

 
 
 
Ca(Ce,La)(Mg,Fe2+)(Al,Fe3+)2[O|OH|SiO4|Si2O7]
monoklin
P21/m

 
 
 
CaLa(Al2Mg)[Si2O7][SiO4]O(OH)
monoklin
P2/m

 
 
 
CaCeFe3+AlMn2+(Si2O7)(SiO4)O(OH)
monoklin
P21/m

 
 
 
CaLaFe3+AlMn2+(Si2O7)(SiO4)O(OH)
monoklin
P21/m

 
 
 
Ca(Ce,La,Nd,Ca)Fe2+(Fe3+,Al,Ti4+)2[O|OH|SiO4|Si2O7]
monoklin
P21/m

 
 
 
Ca(La,Ce,Th)(Fe3+,Al)(Al,Fe3+)(Fe2+,Mn,Ti,Mg)(SiO4)(Si2O7)O(OH)
monoklin
P21/m

 
 
 
Mn2+LaFe3+AlMn2+(Si2O7)(SiO4)O(OH)
monoklin
P21/m

 
 
 
CaLaMn3+AlMn2+(Si2O7)(SiO4)O(OH)
monoklin
P21/m

 
 
 
(Mn2+,Ca)(La,Ce,Nd)Mn2+(Al,Mn3+)2[O|OH|SiO4|Si2O7]
monoklin
P21/m

 
 
 
Mn2+CeAl2Fe2+(Si2O7)(SiO4)O(OH)
monoklin
P21/m

 
 
 
CaLa3+V3+AlFe2+(Si2O7)(SiO4)O(OH)
monoklin
P21/m

 
 
 
(Mn2+,Ca)(REE)V3+AlMn2+(Si2O7)(SiO4)O(OH)
monoklin
P21/m

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Actuality: 24. Nov 2022 - 02:01:53

Other languages

German

Allanit-(Y)

Spanish

Allanita-(Y)

English

Allanite-(Y)

French

Allanite-(Y)

Russian

Алланит-(Y)

Russian

Ортит-(Y)

Simplified Chinese

钇褐帘石

Japanese

イットリウム褐簾石

Alternative Name

German

Bodenit

Yttro-orthite

Yttroorthit

CNMNC symbol

Symbol

Aln-Y

Locations with GPS information