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Biraite-(Ce) (Birait-(Ce))

Pictures (2 Images total)

Birait-(Ce), Aktinolith
Views (File:
1306012810
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Birait-(Ce), Aktinolith
braune Birait-(Ce)-Körner mit grünem Aktinolith; Bildbreite: 15 mm; Fundort: Biraya, Bodaibo-Stadt, Irkutsk Oblast, Russland
Copyright: Pavel M. Kartashov; Contribution: slugslayer
Location: Russland/Sibirien, Föderationskreis/Irkutsk (Irkutskaja), Oblast/Bodaybinsky, Rajon/Bodaibo/Biraya Fe-SE-Vorkommen
Mineral: Actinolite, Biraite-(Ce)
Image: 1306012810
Rating: 5 (votes: 1)
License: Usage for Mineralienatlas project only
Birait-(Ce), Aktinolith

braune Birait-(Ce)-Körner mit grünem Aktinolith; Bildbreite: 15 mm; Fundort: Biraya, Bodaibo-Stadt, Irkutsk Oblast, Russland

Copyright: Pavel M. Kartashov
Contribution: slugslayer 2011-05-21
Locality: Biraya Fe-SE-Vorkommen / Bodaibo / Bodaybinsky, Rajon / Irkutsk (Irkutskaja), Oblast / Sibirien, Föderationskreis / Russland
Birait-(Ce), Aktinolith
Views (File:
1306012889
): 1386
Birait-(Ce), Aktinolith
braune Birait-(Ce)-Körner mit blaugrünem, strahligem Aktinolith; Bildbreite: 8 mm; Fundort: Biraya, Bodaibo-Stadt, Irkutsk Oblast, Russland
Copyright: Pavel M. Kartashov; Contribution: slugslayer
Location: Russland/Sibirien, Föderationskreis/Irkutsk (Irkutskaja), Oblast/Bodaybinsky, Rajon/Bodaibo/Biraya Fe-SE-Vorkommen
Mineral: Actinolite, Biraite-(Ce)
Image: 1306012889
Rating: 4 (votes: 1)
License: Usage for Mineralienatlas project only
Birait-(Ce), Aktinolith

braune Birait-(Ce)-Körner mit blaugrünem, strahligem Aktinolith; Bildbreite: 8 mm; Fundort: Biraya, Bodaibo-Stadt, Irkutsk Oblast, Russland

Copyright: Pavel M. Kartashov
Contribution: slugslayer 2011-05-21
Locality: Biraya Fe-SE-Vorkommen / Bodaibo / Bodaybinsky, Rajon / Irkutsk (Irkutskaja), Oblast / Sibirien, Föderationskreis / Russland

Collectors Summary

Color braun
Streak color beigeweiß
Lustre Glasglanz
Hardness (Mohs) 5
Solubility +++ HCl, HNO3
Crystal System monoklin, P21/c

Chemism

Chemical formula

(Mg,Fe2+)(Ce,La,Nd)2[CO3|Si2O7]

Chemical composition

Cerium, Eisen, Lanthanum, Magnesium, Neodymium, Silicium, Kohlenstoff, Sauerstoff

Unit weight: 540.697467 u; Number of atoms in the formula: 16

Info

Empirical formula:

(Mg0.75Fe0.25)(Ce0.6La0.3Nd0.1)2[CO3Si2O7]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Carbon

C

2.22

1

6.25

12.0107800

12.0107800

Oxygen

O

29.59

10

62.50

15.9994300

159.9943000

Magnesium

Mg

3.37

0.75

4.69

24.3050600

18.2287950

Silicon

Si

10.39

2

12.50

28.0855300

56.1710600

Iron

Fe

2.58

0.25

1.56

55.8452000

13.9613000

Lanthanum

La

15.41

0.6

3.75

138.9055200

83.3433120

Cerium

Ce

31.10

1.2

7.50

140.1161000

168.1393200

Neodymium

Nd

5.34

0.2

1.25

144.2430000

28.8486000

Analysis wt%

SiO2 : 21.07, FeO : 7.68, MgO : 1.81, MnO : 1.39, La2O3 : 16.52, Ce2O3 : 29.58, Nd2O3 : 7.53, Pr2O3 : 2.71, Sm2O3 : 0.70, CaO : 0.66, F : 0.58, CO2 : 7.71, H2O : 1.71, Ln2O3 : 57.04 (Ref: European Journal of Mineralogy 2005)

Strunz 9th edition incl. updates

9.BE.90

9: Silikate (Germanate)
B: Gruppensilikate (Sorosilikate)
E: Si2O7 Gruppen mit zusätzlichen Anionen; Kationen in oktahedraler [6] und größerer Koordination
90:

Lapis Classification

VIII/C.18-005

VIII: SILIKATE
C: Gruppensilikate
18: Gruppensilikate [Si2O7] 6-, mit tetraederfremden Anionen (O,OH,F)

Classification by Hölzel

9.BE.180

9: SILICATES
B: Sorosilicates
E: Cuspidine-Tilleyite-Group

Dana 8th edition

56.05.02.01

56: Sorosilicates Sorosilicate Si2O7 Groups and O, OH, F. and H2O
05: Sorosilicates Sorosilicate Si2O7 Groups and O, OH, F. and H2O

IMA status

anerkannt 2003

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Biraite group

Optical Properties

Color

braun

Streak color

beigeweiß

Diaphaneity (Transparency)

durchscheinend

Lustre

Glasglanz

max. Birefringence

0.035

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

1.785

RI value β

1.810

RI value γ / ε

1.820

Ri mean

1.805

2V angle

Biaxial (-) 66°

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/c

Cell parameters a (Å)

6.505

Cell parameters b (Å)

6.744

Cell parameters c (Å)

18.561

Cell parameters a/b or c/a

0.965

Cell parameters c/b

2.752

Cell parameters α

90°

Cell parameters β

108.75

Cell parameters γ

90°

Z

4

Volume (ų)

771.053

X-Ray Powder Diffraction

4.41(4), 3.61(4), 3.30(5), 2.92(10), 2.65(5), 2.23(5)

XRD chart Biraite-(Ce)

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5

VHN (Hardness Vickers)

777 (g nicht angegeben)

Density (g/cm³)

4.76

4.658 ( ρ calc. Mineralienatlas )

Tenacity

spröde

Instability

+++ HCl, HNO3

Preface

Rareness

sehr selten

Author (Name, Year)

Konev & Pasero & Pushcharovsky & Merlino & Kashaev & Suvarova & Ushcha

Additional Information

in Salzsäure und Salpetersäure löslich

References

European Journal of Mineralogy 17 (2005), 715

IMA group assignments


 
 
Ce2Mn(CO3)(Si2O7)
monoklin
P21/c

 
 
La2Mn(CO3)(Si2O7)
monoklin
P21/c

 
 
(Mg,Fe2+)(Ce,La,Nd)2[CO3|Si2O7]
monoklin
P21/c

 
 
La2Fe2+(CO3)(Si2O7)
monoklin
P21/c

Refresh list

Actuality: 15. May 2024 - 10:41:07

Other languages

German

Birait-(Ce)

French

Biraite-(Ce)

English

Biraite-(Ce)

Spanish

Biraíta-(Ce)

Russian

Бираит-(Се)

Traditional Chinese

碳矽鐵鈰石

Simplified Chinese

碳硅铁铈石

CNMNC (IMA)-Number

IMA 2003-037

CNMNC symbol

Symbol

Bia-Ce

Locations with GPS information

IDs

GUSID (Global unique identifier short form) mkwCbtOyZESmAEQZbloTEQ
GUID (Global unique identifier) 6E024C9A-B2D3-4464-A600-44196E5A1311
Database ID 403