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Banalsite

Pictures (2 Images total)

Banalsit
Views (File:
1192971447
): 1913
Banalsit
Banalsit aus der Benallt Mine, Lleyn, Wales, UK
Copyright: rtbstone; Contribution: rtbstone
Collection: rtbstone
Location: UK/Wales/Conwy (Gwynedd; Caernarvonshire)/Lleyn, Halbinsel/Llanfaelrhys/Rhiw/Benallt Mine
Mineral: Banalsite
Image: 1192971447
License: Usage for Mineralienatlas project only
Banalsit

Banalsit aus der Benallt Mine, Lleyn, Wales, UK
Collection: rtbstone
Copyright: rtbstone
Contribution: rtbstone 2007-10-21
Locality: Benallt Mine / Rhiw / Llanfaelrhys / Lleyn, Halbinsel / Conwy (Gwynedd; Caernarvonshire) / Wales / UK
Banalsit
Views (File:
1197012245
): 3942
Banalsit
Brauner bis fleischfarbener Banalsit; Benallt Mine, Lleyn-Halbinsel, Wales; Größe: 5 x 6 cm
Copyright: Dan Weinrich; Contribution: Collector
Location: UK/Wales/Conwy (Gwynedd; Caernarvonshire)/Lleyn, Halbinsel/Llanfaelrhys/Rhiw/Benallt Mine
Mineral: Banalsite
Image: 1197012245
License: Usage for Mineralienatlas project only
Banalsit

Brauner bis fleischfarbener Banalsit; Benallt Mine, Lleyn-Halbinsel, Wales; Größe: 5 x 6 cm
Copyright: Dan Weinrich
Contribution: Collector 2007-12-07
Locality: Benallt Mine / Rhiw / Llanfaelrhys / Lleyn, Halbinsel / Conwy (Gwynedd; Caernarvonshire) / Wales / UK

Collectors Summary

Color weiß bis grau
Streak color weiß
Hardness (Mohs) 6
Solubility +++ HCl
Crystal System orthorhombisch, Iba2

Additional information / Summary

Siehe auch unser umfangreiches Feldspat-Portrait

Chemism

Chemical formula

BaNa2Al4Si4O16

Chemical composition

Aluminium, Barium, Natrium, Silicium, Sauerstoff

Unit weight: 659.5663932 u; Number of atoms in the formula: 27

Info

Empirical formula:

BaNa2Al4Si4O16

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

38.81

16

59.26

15.9994300

255.9908800
Sodium

Na

6.97

2

7.41

22.9897702

45.9795404
Aluminium

Al

16.36

4

14.81

26.9815382

107.9261528
Silicon

Si

17.03

4

14.81

28.0855300

112.3421200
Barium

Ba

20.82

1

3.70

137.3277000

137.3277000

Analysis wt%

SiO2 : 37.04, Al2O3 : 31.27, BaO : 19.19, SrO : 4.03, Na2O : 9.46 (Ref: Bull.Natl.Sci.Mus.Tokyo,85)

Strunz 9th edition incl. updates

9.FA.60

9: Silikate (Germanate)
F: Gerüstsilikate (Tektosilikate) ohne zeolithisches H2O
A: Gerüstsilikate (Tektosilicates) ohne weitere [Anionen]
60:Stronalsit-Gruppe

Lapis Classification

VIII/J.07-100

VIII: SILIKATE
J: Gerüstsilikate (mit Zeolithen)
7: Ohne tetraederfremde Anionen; Feldspat-Gruppe

Classification by Hölzel

9.FD.210

9: SILICATES
F: Tektosilicates
D: Plagioclase-Group

Dana 8th edition

76.01.06.01

76: Tektosilicates Tectosilicate Al-Si Framework
01: Tektosilicates Tectosilicate Al-Si Framework with Al-Si frameworks
06: Banalsite group

IMA status

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Feldspar group

Optical Properties

Color

weiß bis grau

Streak color

weiß

Diaphaneity (Transparency)

durchscheinend bis transparent

max. Birefringence

0.008
Birefringence chart\! Banalsite title=Birefringence chart Banalsite

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

1.570

RI value β

1.571

RI value γ / ε

1.578

Ri mean

1.573

2V angle

Biaxial (+) 41°

Optical Data Luminescence

Color LW-UV (365nm)

  

gelblich grün

LW-UV Observation Frequency

sehr häufig

MW-UV (320nm)

  

gelblich grün

MW-UV Observation Frequency

sehr häufig

Color SW-UV (254nm)

  

bläulich weiß

SW-UV Intensity

schwach

SW-UV Observation Frequency

sehr häufig

SW-UV Other Colors

  

rot

Color SW-UV Afterglow (254nm)

  

grün

SW-UV Afterglow Observation Frequency

sehr häufig

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mm2

Space Group number

45

Space Group

Iba2

Cell parameters a (Å)

8.497

Cell parameters b (Å)

9.983

Cell parameters c (Å)

16.756

Cell parameters a/b or c/a

0.851

Cell parameters c/b

1.678

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volumne (ų)

1421.337

X-Ray Powder Diffraction

8.5(80),
5.2(90),
4.2(60),
3.77(70),
3.53(100),
3.21(80),
2.90(80),
2.09(80)
XRD chart Banalsite

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

VHN (Hardness Vickers)

730 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.065

3.082 ( ρ calc. Mineralienatlas )

Instability

+++ HCl

(Co-)Type locality

(Co-)Type locality

UK/Wales/Conwy (Gwynedd; Caernarvonshire)/Lleyn, Halbinsel/Llanfaelrhys/Rhiw/Benallt Mine

UK/Wales/Gwynedd/Aberdaron/Rhiw/Benallt Manganese Mine

Preface

Rareness

Selten

Author (Name, Year)

Campbell Smith & Bannister & Hey, 1944

Additional Information

Feldspat-Gruppe (Anorthoklas-Anorthit-Banalsit-Serie)

References

Canadian Mineralogist 44 (2006), 533

IMA group assignments

Other languages

German

Banalsit

Spanish

Banalsita

English

Banalsite

French

Banalsite

Russian

Банальсит

CNMNC symbol

Symbol

Bns

Locations with GPS information