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Bariumbannisterite

Collectors Summary

Color dunkelbraun
Hardness (Mohs) 4
Cleavages {???} vollkommen
Crystal System monoklin,

Chemism

Chemical formula

(K,H3O)(Ba,Ca)(Mn2+,Fe2+,Mg)21(Si,Al)32O80(O,OH)16·4-12 H2O

Chemical composition

Aluminium, Barium, Calcium, Eisen, Magnesium, Mangan, Silicium, Kalium, Sauerstoff, Wasserstoff

Unit weight: 3816.18442559 u; Number of atoms in the formula: 179.75

Info

Empirical formula:

(K0.75(H3O)0.25)(Ba0.75Ca0.25)(Mn0.6Fe0.3Mg0.1)21(Si0.75Al0.25)32O80(O0.75(OH)0.25)16·8H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.55

20.75

11.54

1.0079470

20.9149003
Oxygen

O

43.71

104.25

58.00

15.9994300

1,667.9405775
Magnesium

Mg

1.34

2.1

1.17

24.3050600

51.0406260
Aluminium

Al

5.66

8

4.45

26.9815382

215.8523056
Silicon

Si

17.66

24

13.35

28.0855300

674.0527200
Potassium

K

0.77

0.75

0.42

39.0983100

29.3237325
Calcium

Ca

0.26

0.25

0.14

40.0784000

10.0196000
Manganese

Mn

18.14

12.6

7.01

54.9380499

692.2194287
Iron

Fe

9.22

6.3

3.50

55.8452000

351.8247600
Barium

Ba

2.70

0.75

0.42

137.3277000

102.9957750

Strunz 9th edition incl. updates

9.EG.40

9: Silikate (Germanate)
E: Schichtsilikate (Phyllosilikate)
G: Doppelnetze mit sechsfach-Ringen
40:Stilpnomelan-Gruppe

Lapis Classification

VIII/H.17-020

VIII: SILIKATE
H: Schichtsilikate
17: Glimmerartige Schicht-silikate mit Baugruppen [Si4O10] 4- und verwandte Strukturen;

Optical Properties

Color

dunkelbraun

Crystallography

Crystal System

monoklin

Cell parameters α

90°

Cell parameters γ

90°

Physical Properties

Hardness (Mohs)

4

Cleavages

{???} vollkommen

References

American Mineralogist 75, p.936,1990.

Other languages

Spanish

Bariobannisterita

German

Bariumbannisterit

English

Bariumbannisterite

French

Bariumbannisterite

Alternative Name

Spanish

Bariumbannisterita

IDs

GUSID (Global unique identifier short form) it33y9duLketwjxYiKAylA
GUID (Global unique identifier) CBF7DD8A-6ED7-472E-ADC2-3C5888A03294
Database ID 297