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Abenakiite-(Ce)

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Abenakiit-(Ce)
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Abenakiit-(Ce)
rotbraune Massen von Abenakiit-(Ce), Umbozero Mine, Alluaiv Mountain, Lovozero, Murmansk Oblast, Russland; BB ~ 2 mm
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Lovozero/Alluaiv/Umbozero
Mineral: Abenakiite-(Ce)
Image: 1587038093
License: Usage for Mineralienatlas project only
Abenakiit-(Ce)

rotbraune Massen von Abenakiit-(Ce), Umbozero Mine, Alluaiv Mountain, Lovozero, Murmansk Oblast, Russland; BB 2 mm

Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-04-16
Locality: Umbozero / Alluaiv / Lovozero / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Color blass braun
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 4 - 5
Cleavages undeutlich [001]
Fracture muschelig
Solubility +++ 1:1 HCl mit sehr schwacher Gasblasenentwicklung
Crystal System trigonal, R3

Additional information / Summary

Chemism

Chemical formula

Na26Ce6(Si6O18)(PO4)6(CO3)6(SO2)O

Chemical composition

Cerium, Natrium, Silicium, Kohlenstoff, Phosphor, Sauerstoff, Schwefel

Unit weight: 2904.8806424 u; Number of atoms in the formula: 114

Info

Empirical formula:

Na26Ce6(Si6O18)(PO4)6(CO3)6(SO2)O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Carbon

C

2.48

6

5.26

12.0107800

72.0646800

Oxygen

O

34.70

63

55.26

15.9994300

1,007.9640900

Sodium

Na

20.58

26

22.81

22.9897702

597.7340252

Silicon

Si

5.80

6

5.26

28.0855300

168.5131800

Phosphorus

P

6.40

6

5.26

30.9737612

185.8425672

Sulfur

S

1.10

1

0.88

32.0655000

32.0655000

Cerium

Ce

28.94

6

5.26

140.1161000

840.6966000

Analysis wt%

Na2O : 25.04, Ce2O3 : 15.50, La2O3 : 6.08, Nd2O3 : 8.04, Pr2O3 : 1.91, Sm2O3 : 0.88, ThO2 : 1.86, SiO2 : 13.71, P2O5 : 14.60, SO2 : 2.34, CO2 : 9.10, Ln2O3 : 32.41 (Ref: Canadian Mineralogist 94)

Strunz 9th edition incl. updates

9.CK.10

9: Silikate (Germanate)
C: Ringsilikate (Cyclosilikate)
K: ~[Si6O18]12- sechser-Einfachringe, mit inselartig, komplexe [Anionen]
10:

Lapis Classification

VIII/E.17-005

VIII: SILIKATE
E: Ringsilikate
17: Sechserringe [Si6O18] 12-

Classification by Hölzel

9.BI.380

9: SILICATES
B: Sorosilicates
I: Murmanite-Group

Dana 8th edition

61.04.01.01

61: Cyclosilicates Cyclosilicate Six-Membered Rings
04: Cyclosilicates Cyclosilicate Six-Membered Rings with other anions

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

blass braun

Streak color

weiß

Diaphaneity (Transparency)

transparent

Lustre

Glasglanz

max. Birefringence

0.003

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

1.589

RI value γ / ε

1.586

Ri mean

1.588

2V angle

Uniaxial (-)

Optical Data Luminescence

Luminescence

keine Fluoreszenz bekannt

Crystallography

Crystal System

trigonal

Class (H-M)

3

Space Group number

148

Space Group

R3

Cell parameters a (Å)

16.018

Cell parameters b (Å)

-

Cell parameters c (Å)

19.761

Cell parameters a/b or c/a

1.234

Cell parameters c/b

-

Z

3

Volume (ų)

4390.926

X-Ray Powder Diffraction

11.4(70),
8.04(80),
6.55(80),
4.646(70),
3.773(90),
3.591(80),
3.150(70),
2.674(100)

XRD chart Abenakiite-(Ce)

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

4 - 5

VHN (Hardness Vickers)

190 (ungefähre Angabe abgeleitet aus der Mohshärte)>

Density (g/cm³)

3.21

3.295 ( ρ calc. Mineralienatlas )

Cleavages

undeutlich [001]

Fracture

muschelig

Tenacity

spröde

Instability

+++ 1:1 HCl mit sehr schwacher Gasblasenentwicklung

Preface

Associations

Aegirin, Eudialyt, Mangan-Neptunit, Polylithionit, Serandit, Steenstrupin-(Ce)

Name from

Der Name `Abenakiit-(Ce)` ist den Abenaki-Indianern gewidmet, die ehemals im Gebiet um den Mont St. Hilaire ansässig waren.

Author (Name, Year)

McDonald & Chao & Grice, 1994

References

McDonald AM, Chao GY: Can.Min.(1994) 32, 843-854

Weiß, S., 1995, Lapis: 20, 10/95, S.46

Other languages

German

Abenakiit-(Ce)

English

Abenakiite-(Ce)

French

Abenakiite-(Ce)

Latvian

Abenakijīts-(Ce)

Spanish

Abenakiíta-(Ce)

Portuguese

Abenakiíte-(Ce)

Russian

Абенакиит-(Ce)

CNMNC (IMA)-Number

IMA 1991-054

CNMNC symbol

Symbol

Abk-Ce

Locations with GPS information

IDs

GUSID (Global unique identifier short form) RI4qBrVMKk2691Dj257iyA
GUID (Global unique identifier) 062A8E44-4CB5-4D2A-BAF7-50E3DB9EE2C8
Database ID 3