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Långbanite (Långbanit)

Pictures (2 Images total)

Långbanit
Views (File:
1283686934
): 1328
Långbanit
Kristallgröße: 0,8 mm, Fundort: Långban, Filipstad, Värmland, Schweden
Copyright: Jason B. Smith; Contribution: thdun5
Location: Schweden/Värmland, Provinz/Filipstad, Gemeinde/Långban, Distrikt/Långban Fe-Mn-(Ba-As-Pb-Sb) Lagerstätte
Mineral: Långbanite
Image: 1283686934
Rating: 7 (votes: 1)
License: Usage for Mineralienatlas project only
Långbanit

Kristallgröße: 0,8 mm, Fundort: Långban, Filipstad, Värmland, Schweden

Copyright: Jason B. Smith
Contribution: thdun5 2010-09-05
Locality: Långban Fe-Mn-(Ba-As-Pb-Sb) Lagerstätte / Långban, Distrikt / Filipstad, Gemeinde / Värmland, Provinz / Schweden
Långbanit xx auf Rhodonit xx
Views (File:
1430863880
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Långbanit xx auf Rhodonit xx
Fundort: Långban, Filipstad, Värmland, Schweden; Größe: 8 x 6 x 4 cm
Copyright: Millerit; Contribution: Millerit
Collection: Millerit
Location: Schweden/Värmland, Provinz/Filipstad, Gemeinde/Långban, Distrikt
Mineral: Långbanite
Image: 1430863880
Rating: 6 (votes: 1)
License: Usage for Mineralienatlas project only
Långbanit xx auf Rhodonit xx

Fundort: Långban, Filipstad, Värmland, Schweden; Größe: 8 x 6 x 4 cm

Collection: Millerit
Copyright: Millerit
Contribution: Millerit 2015-05-06
Locality: Långban, Distrikt / Filipstad, Gemeinde / Värmland, Provinz / Schweden

Collectors Summary

Color schwarz-met.
Lustre Metallglanz
Hardness (Mohs) 6.5
Solubility +++ HF, + HCl
Crystal System monoklin, C2/m

Chemism

Chemical formula

(Mn2+,Ca,Fe,Mg)4(Mn3+,Fe3+)9Sb5+[O16(SiO4)2]

Chemical composition

Antimon, Calcium, Eisen, Magnesium, Mangan, Silicium, Sauerstoff

Unit weight: 1254.557898605 u; Number of atoms in the formula: 40

Info

Empirical formula:

(Mn0.55Ca0.3Fe0.1Mg0.05)4(Mn0.75Fe0.25)9Sb[O16(SiO4)2]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

30.61

24

60.00

15.9994300

383.9863200

Magnesium

Mg

0.39

0.2

0.50

24.3050600

4.8610120

Silicon

Si

4.48

2

5.00

28.0855300

56.1710600

Calcium

Ca

3.83

1.2

3.00

40.0784000

48.0940800

Manganese

Mn

39.19

8.95

22.38

54.9380499

491.6955466

Iron

Fe

11.80

2.65

6.63

55.8452000

147.9897800

Antimony

Sb

9.71

1

2.50

121.7601000

121.7601000

Analysis wt%

CaO : 1.73, MnO : 20.53, MgO : 0.54, Mn2O3 : 50.14, Fe2O3 : 3.44, Sb2O5 : 14.03, SiO2 : 9.59 (Ref: American Mineralogist 70)

Strunz 9th edition incl. updates

9.AG.10

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
G: Insel(Neso)silikate mit zusätzlichem Anionen; Kationen in meist [6] und > [6] Koordination
10:

Lapis Classification

VIII/B.09-017

VIII: SILIKATE
B: Inselsilikate mit tetraederfremden Anionen

Classification by Hölzel

9.AG.600

9: SILICATES
A: Nesosilicates
G: Nesosilicates with Cation: O
6: With As,Sb,Bi Langbanite-Katoptrite-Group

Dana 8th edition

44.03.04.01

44: Antimonates
03: Antimonates with miscellaneous formulae

IMA status

anerkannt

Mineral status

anerkanntes Mineral

Optical Properties

Color

schwarz-met.

Lustre

Metallglanz

max. Birefringence

0.05

Birefringence chart\! Långbanite title=Birefringence chart Långbanite

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

2.36

RI value γ / ε

2.31

Ri mean

2.343

2V angle

Uniaxial (-)

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell parameters a (Å)

11.561 -

Cell parameters b (Å)

20.05 -

Cell parameters c (Å)

11.075 -

Cell parameters α

90°

Cell parameters β

90.3

Cell parameters γ

90°

Z

6

Volumne (ų)

2567.128

Kristall structure

pseudo-trigonale Subzelle

X-Ray Powder Diffraction

2.80(50),
2.564(100),
2.00(20),
1.759(20),
1.669(30),
1.556(30),
1.43(20),
1.073(10)

XRD chart Långbanite

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)

6.5

VHN (Hardness Vickers)

960 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.91 (gemessen) 4.95 (berechnet)

4.869 ( ρ calc. Mineralienatlas )

Instability

+++ HF, + HCl

Preface

Author (Name, Year)

Flink, 1877

References

American Mineralogist 55 (1970), 1489-1499.

Mineralogical Magazine 38 (1971), 103.

Neues Jahrbuch für Mineralogie, Monatshefte (1991), 193-211.

American Mineralogist 76 (1991), 1408-1425.

Neues Jahrbuch für Mineralogie, Monatshefte 7 (1992), 452.

Handbook of Mineralogy (Anthony u.w.) 2 (1995), 447.

Other languages

German

Långbanit

Spanish

Långbanita

English

Långbanite

French

Långbanite

Russian

Лангбанит

Japanese

ラングバン石

Alternative Name

English

Ferrostibian

CNMNC symbol

Symbol

Lgb

Locations with GPS information