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Kvanefjeldite

Collectors Summary

Color violettrosa
Streak color weiß
Hardness (Mohs) 5.50 - 6.00
Crystal System orthorhombisch, Pcab

Chemism

Chemical formula

Na4(Ca,Mn)Si6O14(OH)2

Chemical composition

Calcium, Mangan, Natrium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 562.272347275 u; Number of atoms in the formula: 29

Info

Empirical formula:

Na4(Ca0.75Mn0.25)Si6O14(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.36

2

6.90

1.0079470

2.0158940
Oxygen

O

45.53

16

55.17

15.9994300

255.9908800
Sodium

Na

16.35

4

13.79

22.9897702

91.9590808
Silicon

Si

29.97

6

20.69

28.0855300

168.5131800
Calcium

Ca

5.35

0.75

2.59

40.0784000

30.0588000
Manganese

Mn

2.44

0.25

0.86

54.9380499

13.7345125

Analysis wt%

SiO2 : 65.00, MnO : 1.59, CaO : 8.49, Na2O : 22.06, Y2O3 : 0.40, H2O : 3.21, Ln2O3 : 0.40 (Ref: Canadian Mineralogist 84)

Strunz 9th edition incl. updates

9.DP.30

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
P: Übergangsstrukturen: Ketten- und Bandsilikate - Schichtsilikat
30:Kvanefjeldit-Gruppe

Lapis Classification

VIII/G.08-010

VIII: SILIKATE
G: Übergangsstrukturen zwischen Ketten- und Schichtsilikaten

Classification by Hölzel

9.DU.250

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
U: Chains to Phyllosilicates
2: Eudidymite-Group

Dana 8th edition

72.05.03.01

72: Phyllosilicates Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
05: Phyllosilicates Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with corrugated and complex layers

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

violettrosa

Streak color

weiß

max. Birefringence

0.021
Birefringence chart\! Kvanefjeldite title=Birefringence chart Kvanefjeldite

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

1.522

RI value β

1.522

RI value γ / ε

1.543

Ri mean

1.529

2V angle

Biaxial (+) 5°~

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

61

Space Group

Pcab

Cell parameters a (Å)

10.213

Cell parameters b (Å)

15.878

Cell parameters c (Å)

9.058

Cell parameters a/b or c/a

0.643

Cell parameters c/b

0.570

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volume (ų)

1468.864

X-Ray Powder Diffraction

4.447(60),
4.355(70),
3.880(70),
3.671(40),
3.388(60),
3.313(50),
3.117(100),
2.576(50)
XRD chart Kvanefjeldite

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)

5.50 - 6.00

VHN (Hardness Vickers)

630 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.55 (gemessen)

2.542 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Grönland/Kommune Kujalleq/Narsaq/Ilimaussaq-Komplex/Kuannersuit-Plateau/Kvanefjeld U-Lagerstätte/Kvanefjeld-Tunnel/Kvanefjeldit-Vorkommen

Preface

Author (Name, Year)

Petersen & Johnsen & Leonardsen & Rønsbo, 1984

References

Canadian Mineralogist 22 (1984), 465

Other languages

German

Kvanefjeldit

Spanish

Kvanefjeldita

English

Kvanefjeldite

French

Kvanefjeldite

CNMNC (IMA)-Number

IMA 1982-079

CNMNC symbol

Symbol

Kva

Locations with GPS information

IDs

GUSID (Global unique identifier short form) HShtTEOcMkS7ahxHu-1a8Q
GUID (Global unique identifier) 4C6D281D-9C43-4432-BB6A-1C47BBED5AF1
Database ID 2101