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Brokenhillite (Brokenhillit)

Collectors Summary

Color braun
Streak color hellbraun
Hardness (Mohs) 4.00 - 5.00
Crystal System hexagonal, P63mc

Chemism

Chemical formula

(Mn,Fe)8Si6O15(OH,Cl)10

Chemical composition

Chlor, Eisen, Mangan, Silicium, Sauerstoff, Wasserstoff

Unit weight: 1066.0116569 u; Number of atoms in the formula: 46.5

Info

Empirical formula:

(Mn0.75Fe0.25)8Si6O15((OH)0.75Cl0.25)10

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.71

7.5

16.13

1.0079470

7.5596025

Oxygen

O

33.77

22.5

48.39

15.9994300

359.9871750

Silicon

Si

15.81

6

12.90

28.0855300

168.5131800

Chlorine

Cl

8.31

2.5

5.38

35.4532000

88.6330000

Manganese

Mn

30.92

6

12.90

54.9380499

329.6282994

Iron

Fe

10.48

2

4.30

55.8452000

111.6904000

Strunz 9th edition incl. updates

9.EE.10

9: Silikate (Germanate)
E: Schichtsilikate (Phyllosilikate)
E: Einfache tetrahedrale Netze aus sechsfach-Ringen, verbunden über octahedrale Netze oder Bänder
10:

Lapis Classification

VIII/H.28-030

VIII: SILIKATE
H: Schichtsilikate
28: Schichtsilikate mit anderen Einfachschichten [Si6O15] 6- u.a.

Classification by Hölzel

9.EP.130

9: SILICATES
E: Phyllosilicates
P: Pyrosmalite-Group
1: Phyllosilicates with other Monolayers

IMA status

Ohne Prüfung durch die CNMNC veröffentlicht

Mineral status

Mineralstatus fragwürdig

Optical Properties

Color

braun

Streak color

hellbraun

RI value α / ω / n

1.716

Ri mean

1.716

2V angle

Uniaxial

Crystallography

Crystal System

hexagonal

Class (H-M)

6mm

Space Group number

186

Space Group

P63mc

Cell parameters a (Å)

13.481

Cell parameters b (Å)

-

Cell parameters c (Å)

14.084

Cell parameters a/b or c/a

1.045

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

4

Volume (ų)

2216.669

Physical Properties

Hardness (Mohs)

4.00 - 5.00

Density (g/cm³)

3.28 (berechnet)

3.194 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Australien/New South Wales/Yancowinna Co./Broken Hill

Preface

Author (Name, Year)

Czank, 1988

References

American Mineralogist 74 (1989), 1399

Other languages

German

Brokenhillit

Spanish

Brokenhillita

French

Brokenhillite

English

Brokenhillite

Locations with GPS information

IDs

GUSID (Global unique identifier short form) K-x3RhlKNkSeIWQ-cVsaGA
GUID (Global unique identifier) 4677EC2B-4A19-4436-9E21-643E715B1A18
Database ID 506