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Alnaperbøeite-(Ce)

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Alnaperbøeit-(Ce)
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Alnaperbøeit-(Ce)
grüngrauer Kristall von Alnaperbøeit-(Ce), Stetind Pegmatit, Tysfjord, Nordland, Norwegen; BB ~ 1 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Norwegen/Nordland, Provinz/Narvik, Kommune/Stetind Pegmatit
Mineral: Alnaperbøeite-(Ce)
Image: 1583580310
License: Usage for Mineralienatlas project only
Alnaperbøeit-(Ce)

grüngrauer Kristall von Alnaperbøeit-(Ce), Stetind Pegmatit, Tysfjord, Nordland, Norwegen; BB 1 mm, analysiert

Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-03-07
Locality: Stetind Pegmatit / Narvik, Kommune / Nordland, Provinz / Norwegen

Collectors Summary

Color gräulich, sehr blass grün
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 6 - 7
Cleavages gut {100}, unvollkommen {001}
Fracture unregelmäßig
Crystal System monoklin, P21/m

Chemism

Chemical formula

(CaCe2.5Na0.5)(Al4)(Si2O7)(SiO4)3O(OH)2

Additional chem. information

Mitgied einer polysomatischen Serie mit Epidot und Törnebohmit als Endglieder

Chemical composition

Aluminium, Calcium, Cerium, Natrium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 1004.2206919 u; Number of atoms in the formula: 37

Info

Empirical formula:

(CaCe2.5Na0.5)(Al4)(Si2O7)(SiO4)3O(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.20

2

5.41

1.0079470

2.0158940

Oxygen

O

35.05

22

59.46

15.9994300

351.9874600

Sodium

Na

1.14

0.5

1.35

22.9897702

11.4948851

Aluminium

Al

10.75

4

10.81

26.9815382

107.9261528

Silicon

Si

13.98

5

13.51

28.0855300

140.4276500

Calcium

Ca

3.99

1

2.70

40.0784000

40.0784000

Cerium

Ce

34.88

2.5

6.76

140.1161000

350.2902500

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.23-097

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

IMA status

anerkannt - Neue Mineralien Feb. 2013; CNMNC Newsletter No. 15

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Epidote-törnebohmite polysomatic series
Gatelite supergroup  ⇒ Alnaperbøeite group

Optical Properties

Color

gräulich, sehr blass grün

Streak color

weiß

Diaphaneity (Transparency)

transparent

Lustre

Glasglanz

max. Birefringence

0.032

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

1.778

RI value β

1.784

RI value γ / ε

1.810

Ri mean

1.757

2V angle

Biaxial (+) 33.5°

Dispersion

geneigt (etwas stärker)

Pleochroism

keiner

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

11

Space Group

P21/m

Cell parameters a (Å)

8.9277

Cell parameters b (Å)

5.6548

Cell parameters c (Å)

17.587

Cell parameters a/b or c/a

1.579

Cell parameters c/b

3.11

Cell parameters α

90°

Cell parameters β

116.475

Cell parameters γ

90°

Z

2

Volume (ų)

794.757

Crystal structure

Struktur bestimmt

X-Ray Powder Diffraction

15.743(92), 4.616(30), 3.499(42), 2.983(100), 2.827(47), 2.751(32), 2.659(23), 2.619(57)

XRD chart Alnaperbøeite-(Ce)

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

6 - 7

Density (g/cm³)

4.308 (berechnet)

4.196 ( ρ calc. Mineralienatlas )

Cleavages

gut {100}, unvollkommen {001}

Fracture

unregelmäßig

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

Norwegen/Nordland, Provinz/Narvik, Kommune/Stetind Pegmatit

Type material

Museo di Storia Naturale, Universita` degli Studi di Firenze, Firenze, Italy

Collection number of type material

3114/I

Preface

Author (Name, Year)

Paola Bonazzi, Luca Bindi, Christian Chopin, Tomas A. Husdal und Giovanni O. Lepore (2013)

References

Bonazzi, P., Bindi, L., Chopin, C., Husdal, T.A. and Lepore, G.O. (2013) IMA 2012-054. CNMNC Newsletter No. 15, February 2013, page 4; Mineralogical Magazine, 77, 112.

Paola Bonazzi, Giovanni O. Lepore, Luca Bindi, Christian Chopin, Tomas A. Husdal, Olaf Medenbach: Perbøeite-(Ce) and alnaperbøeite-(Ce), two new members of the epidote-törnebohmite polysomatic series: Chemistry, structure, dehydrogenation, and clue for a sodian epidote end-member. American Mineralogist Vol. 99, Nr. 1 (2014) S. 157-169.

IMA group assignments


 
 
(CaCe2.5Na0.5)(Al4)(Si2O7)(SiO4)3O(OH)2
monoklin
P21/m

 
 
(CaCe3)(Fe3+Al2Fe2+)(Si2O7)(SiO4)3O(OH)2
monoklin
P21/m

 
 
(Ca,Ce)4(Al,Mg,Fe)4(Si2O7)(SiO4)3(O,F,OH)3
monoklin
P21/a

 
 
(CaCe3)(Al3Fe2+)(Si2O7)(SiO4)3O(OH)2
monoklin
P21/m

 
 
(CaLa3)(Al3Fe2+)[Si2O7][SiO4]3O(OH)2
monoklin
P21/m

 
 
Ce3CaMg2Al2Si5O19(OH)2F
monoklin
P21/m



 
 
 
(CaCe2.5Na0.5)(Al4)(Si2O7)(SiO4)3O(OH)2
monoklin
P21/m

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Actuality: 17. Apr 2024 - 03:13:50

Other languages

German

Alnaperbøeit-(Ce)

English

Alnaperbøeite-(Ce)

Alternative Name

English

Alnaperboeite-(Ce)

German

Alnaperböeit-(Ce)

CNMNC (IMA)-Number

IMA 2012-054

CNMNC symbol

Symbol

Apbø-Ce

Locations with GPS information

IDs

GUSID (Global unique identifier short form) qrhjZRvDVkGRnjFjNG-rHA
GUID (Global unique identifier) 6563B8AA-C31B-4156-919E-3163346FAB1C
Database ID 7507