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Alluaivite

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Alluaivit xx
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Alluaivit xx
Bildbreite ca. 34 mm
Copyright: Andreas S.; Contribution: Andi_Y
Location: Schweden/Jonköping, Provinz/Jönköping/Gränna/Norra Kärr
Mineral: Alluaivite
Image: 1701546010
License: Usage for Mineralienatlas project only
Alluaivit xx

Bildbreite ca. 34 mm
Copyright: Andreas S.
Contribution: Andi_Y 2023-12-02
Locality: Norra Kärr / Gränna / Jönköping / Jonköping, Provinz / Schweden

Collectors Summary

Color farblos, bräunlichrosa
Streak color weiß
Hardness (Mohs) 5.00 - 6.00
Fracture halbmuschelig
Solubility ++ HCl
Crystal System trigonal, R3m

Chemism

Chemical formula

Na19(Ca,Mn2+)6(Ti,Nb)3(Si3O9)2(Si10O28)2Cl·2H2O

Chemical composition

Calcium, Chlor, Mangan, Natrium, Niob, Silicium, Titan, Sauerstoff, Wasserstoff

Unit weight: 2862.61171815 u; Number of atoms in the formula: 135

Info

Empirical formula:

Na19(Ca0.75Mn0.25)6(Ti0.75Nb0.25)3(Si3O9)2(Si10O28)2Cl·2H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.14

4

2.96

1.0079470

4.0317880
Oxygen

O

42.48

76

56.30

15.9994300

1,215.9566800
Sodium

Na

15.26

19

14.07

22.9897702

436.8056338
Silicon

Si

25.51

26

19.26

28.0855300

730.2237800
Chlorine

Cl

1.24

1

0.74

35.4532000

35.4532000
Calcium

Ca

6.30

4.5

3.33

40.0784000

180.3528000
Titanium

Ti

3.76

2.25

1.67

47.8671000

107.7009750
Manganese

Mn

2.88

1.5

1.11

54.9380499

82.4070749
Niobium

Nb

2.43

0.75

0.56

92.9063820

69.6797865

Analysis wt%

SiO2 : 53.30, TiO2 : 6.00, Nb2O5 : 3.90, Ce2O3 : 0.80, MnO : 3.60, CaO : 8.60, SrO : 1.00, BaO : 0.60, Na2O : 18.60, Cl : 0.80, H2O : 1.70 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 90)

Strunz 9th edition incl. updates

9.CO.10

9: Silikate (Germanate)
C: Ringsilikate (Cyclosilikate)
O: ~[Si9O27]18- neuner-Ringe
10:Eudialyt-Gruppe

Lapis Classification

VIII/E.25-080

VIII: SILIKATE
E: Ringsilikate
25: Neunerringe + Dreierringe; Eudialyt-Gruppe

Classification by Hölzel

9.CG.300

9: SILICATES
C: Cyclosilicates
G: ~[Si3O9]6-- + ~[Si9O27]18--Rings Eudialyte-Group
3: Eudialyte-Subgroup - c=60 Series

Dana 8th edition

64.01.01.02

64: Cyclosilicates Cyclosilicates
01: Cyclosilicates Cyclosilicates Cyclosilicate Rings with Other Anions and Insular Silicate Groups with mixed ring types
01: Eudialyte Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos, bräunlichrosa

Streak color

weiß

max. Birefringence

0.008
Birefringence chart\! Alluaivite title=Birefringence chart Alluaivite

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

1.618

RI value γ / ε

1.626

Ri mean

1.621

2V angle

Uniaxial (+)

Optical Data Luminescence

Color LW-UV (365nm)

  

orangerot

LW-UV Intensity

stark

Color SW-UV (254nm)

  

orangerot

SW-UV Intensity

stark

LW-UV Other Colors

  

rot

SW-UV Other Colors

  

rot

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

166

Space Group

R3m

Cell parameters a (Å)

14.046

Cell parameters b (Å)

-

Cell parameters c (Å)

60.60

Cell parameters a/b or c/a

4.314

Cell parameters c/b

-

Z

6

Volume (ų)

10354.01

X-Ray Powder Diffraction

7.14(80),
4.30(70),
3.36(50),
2.960(100),
2.825(100),
2.664(50),
2.583(50),
2.148(70)
XRD chart Alluaivite

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)

5.00 - 6.00

VHN (Hardness Vickers)

530 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.76 (gemessen)

2.754 ( ρ calc. Mineralienatlas )

Fracture

halbmuschelig

Tenacity

spröde

Instability

++ HCl

(Co-)Type locality

(Co-)Type locality

Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Lovozero/Alluaiv

Preface

Author (Name, Year)

Khomyakov & Netschelyustov & Rastsvetaeva, 1990

References

Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 119 (1990) (1), 117

Other languages

German

Alluaivit

Spanish

Alluaivita

English

Alluaivite

French

Alluaivite

Russian

Аллуайвит

CNMNC (IMA)-Number

IMA 1988-052

CNMNC symbol

Symbol

Aav

Locations with GPS information

IDs

GUSID (Global unique identifier short form) FCCNEvYQ4UOEuYqc6kFGAw
GUID (Global unique identifier) 128D2014-10F6-43E1-84B9-8A9CEA414603
Database ID 69