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Janhaugite (Janhaugit)

Pictures (3 Images total)

Janhaugit
Views (File:
1511954943
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Janhaugit
Prismatisch ausgebildeter Janhaugit von Gjerdingen in Norwegen. Bildbreite etwa 4 mm. Ex. Coll. Gunnar Raade
Copyright: Klaus Schäfer; Contribution: Klaus Schäfer
Collection: Klaus Schäfer, Collection number: Gj-JanH-1-1-1
Location: Norwegen/Viken, Provinz/Lunner/Nordmarka/Gjerdingen
Mineral: Janhaugite
Image: 1511954943
License: Usage for Mineralienatlas project only
Janhaugit (SNr: Gj-JanH-1-1-1)

Prismatisch ausgebildeter Janhaugit von Gjerdingen in Norwegen. Bildbreite etwa 4 mm. Ex. Coll. Gunnar Raade
Collection: Klaus Schäfer
Copyright: Klaus Schäfer
Contribution: Klaus Schäfer 2017-11-29
Locality: Gjerdingen / Nordmarka / Lunner / Viken, Provinz / Norwegen
Janhaugit
Views (File:
1512307776
): 294
Janhaugit
Janhaugit von Gjerdingen, Norwegen. Bildhöhe etwa 3,5 mm.
Copyright: Klaus Schäfer; Contribution: Klaus Schäfer
Collection: Klaus Schäfer, Collection number: Gj-Janh-1-1-2
Location: Norwegen/Viken, Provinz/Lunner/Nordmarka/Gjerdingen
Mineral: Janhaugite
Image: 1512307776
License: Usage for Mineralienatlas project only
Janhaugit (SNr: Gj-Janh-1-1-2)

Janhaugit von Gjerdingen, Norwegen. Bildhöhe etwa 3,5 mm.
Collection: Klaus Schäfer
Copyright: Klaus Schäfer
Contribution: Klaus Schäfer 2017-12-03
Locality: Gjerdingen / Nordmarka / Lunner / Viken, Provinz / Norwegen
Monazit-(Ce) und Janhaugit
Views (File:
1512307871
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Monazit-(Ce) und Janhaugit
Gelber Monazit-(Ce)-Kristall auf braunrotem Janhaugit von Gjerdingen, Norwegen. Bildhöhe etwa 4 mm.
Copyright: Klaus Schäfer; Contribution: Klaus Schäfer
Collection: Klaus Schäfer, Collection number: Gj-Janh-2-1-1
Location: Norwegen/Viken, Provinz/Lunner/Nordmarka/Gjerdingen
Mineral: Janhaugite, Monazite-(Ce)
Image: 1512307871
License: Usage for Mineralienatlas project only
Monazit-(Ce) und Janhaugit (SNr: Gj-Janh-2-1-1)

Gelber Monazit-(Ce)-Kristall auf braunrotem Janhaugit von Gjerdingen, Norwegen. Bildhöhe etwa 4 mm.
Collection: Klaus Schäfer
Copyright: Klaus Schäfer
Contribution: Klaus Schäfer 2017-12-03
Locality: Gjerdingen / Nordmarka / Lunner / Viken, Provinz / Norwegen

You find additional Janhaugit specimen at the Geolitho Museum

Collectors Summary

Color rötlichbraun
Streak color hellbraun
Hardness (Mohs) 5
Crystal System monoklin, P21/n

Chemism

Chemical formula

(Na,Ca)3(Mn2+,Fe2+)3(Ti4+,Zr,Nb)2(Si2O7)2O2(OH,F)2

Chemical composition

Calcium, Eisen, Mangan, Natrium, Niob, Silicium, Titan, Zirconium, Fluor, Sauerstoff, Wasserstoff

Unit weight: 781.37987875 u; Number of atoms in the formula: 31.5

Info

Empirical formula:

(Na0.75Ca0.25)3(Mn0.75Fe0.25)3(Ti0.6Zr0.3Nb0.1)2(Si2O7)2O2((OH)0.75F0.25)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.19

1.5

4.76

1.0079470

1.5119205
Oxygen

O

35.83

17.5

55.56

15.9994300

279.9900250
Fluorine

F

1.22

0.5

1.59

18.9984033

9.4992016
Sodium

Na

6.62

2.25

7.14

22.9897702

51.7269830
Silicon

Si

14.38

4

12.70

28.0855300

112.3421200
Calcium

Ca

3.85

0.75

2.38

40.0784000

30.0588000
Titanium

Ti

7.35

1.2

3.81

47.8671000

57.4405200
Manganese

Mn

15.82

2.25

7.14

54.9380499

123.6106123
Iron

Fe

5.36

0.75

2.38

55.8452000

41.8839000
Zirconium

Zr

7.00

0.6

1.90

91.2242000

54.7345200
Niobium

Nb

2.38

0.2

0.63

92.9063820

18.5812764

Analysis wt%

Ø SiO2 : 29.79, TiO2 : 15.18, ZrO2 : 5.98, Nb2O5 : 5.00, MnO : 22.26, FeO : 5.52, Na2O : 11.02, CaO : 1.45, F : 2.69, H2O : 1.63 (Ref: American Mineralogist 83)

Strunz 9th edition incl. updates

9.BE.17

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

Lapis Classification

VIII/C.11-012

VIII: SILIKATE
C: Gruppensilikate
11: Gruppensilikate [Si2O7] 6-, mit tetraederfremden Anionen (O,OH,F); Wöhlerit-Reihe

Classification by Hölzel

9.BH.160

9: SILICATES
B: Sorosilicates
H: Rosenbuschite-Lamprophyllite-Group

Dana 8th edition

56.02.04.10

56: Sorosilicates Sorosilicate Si2O7 Groups and O, OH, F. and H2O
02: Sorosilicates Sorosilicate Si2O7 Groups and O, OH, F. and H2O with cations in [4] and/or >[4] coordination
04: Cuspidine - Wohlerite group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Wöhlerite group

Optical Properties

Color

rötlichbraun

Streak color

hellbraun

Diaphaneity (Transparency)

Semitransparent

max. Birefringence

0.140
Birefringence chart\! Janhaugite title=Birefringence chart Janhaugite

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

1.770

RI value β

1.828

RI value γ / ε

1.910

Ri mean

1.836

2V angle

Biaxial (+) 80°

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/n

Cell parameters a (Å)

10.668

Cell parameters b (Å)

9.787

Cell parameters c (Å)

13.931

Cell parameters a/b or c/a

1.090

Cell parameters c/b

1.423

Cell parameters α

90°

Cell parameters β

107.82

Cell parameters γ

90°

Z

4

Volumne (ų)

1384.721

X-Ray Powder Diffraction

3.920(40),
3.202(60),
2.839(100),
2.833(90),
2.782(90),
2.742(40),
2.717(40),
1.744(50)
XRD chart Janhaugite

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

VHN (Hardness Vickers)

390 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.6

3.748 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Norwegen/Viken, Provinz/Lunner/Nordmarka/Gjerdingen

Preface

Author (Name, Year)

Raade & Mladeck, 1983

References

American Mineralogist 68 (1983), 1216

IMA group assignments

Other languages

German

Janhaugit

Spanish

Janhaugita

French

Janhaugite

English

Janhaugite

Russian

Янхаугит

Traditional Chinese

矽鈦錳鈉石

Simplified Chinese

硅钛锰钠石

CNMNC (IMA)-Number

IMA 1981-018

CNMNC symbol

Symbol

Jhg

Locations with GPS information