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Bonaccordite

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Bonaccordit
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Bonaccordit
gelbe Aggregate von Bonaccordit, Scotia Talc Mine, Bon Accord, Barberton, Ehlanzeni, Mpumalanga, Südafrika; BB < 1 mm
Copyright: Joy Desor; Contribution: openpit
Location: Südafrika/Mpumalanga, Provinz/Ehlanzeni, Distrikt/Barberton/Scotia Talkgrube
Mineral: Bonaccordite
Image: 1590590196
License: Usage for Mineralienatlas project only
Bonaccordit

gelbe Aggregate von Bonaccordit, Scotia Talc Mine, Bon Accord, Barberton, Ehlanzeni, Mpumalanga, Südafrika; BB < 1 mm
Copyright: Joy Desor
Contribution: openpit 2020-05-27
Locality: Scotia Talkgrube / Barberton / Ehlanzeni, Distrikt / Mpumalanga, Provinz / Südafrika

Collectors Summary

Color rotbraun
Streak color bräunlich
Hardness (Mohs) 7
Crystal System orthorhombisch, Pbam

Chemism

Chemical formula

Ni2Fe3+BO5

Chemical composition

Eisen, Nickel, Bor, Sauerstoff

Unit weight: 264.04089 u; Number of atoms in the formula: 9

Info

Empirical formula:

Ni2FeBO5

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Boron

B

4.09

1

11.11

10.8117000

10.8117000
Oxygen

O

30.30

5

55.56

15.9994300

79.9971500
Iron

Fe

21.15

1

11.11

55.8452000

55.8452000
Nickel

Ni

44.46

2

22.22

58.6934200

117.3868400

Strunz 9th edition incl. updates

6.AB.30

6: Borate
A: Monoborate
B: BO3 mit zusätzlichen Anionen; 1(Δ) + OH, etc.
30:Ludwigit-Gruppe

Lapis Classification

V/G.04-050

V: NITRATE, CARBONATE UND BORATE
G: Inselborate
4: [BO3] 3--Inseln; Ludwigit-Gruppe

Classification by Hölzel

6.AB.340

6: Borates
A: Monoborates
B: BO3, with additional anions - 1(P)+OH, etc.
3: Ludwigite-Group (isotypes)

Dana 8th edition

24.02.01.04

24: Borates - Anhydrous
02: Borates - Anhydrous where (A)2 BO2 [XO3]
01: Ludwigite Group (Space Group: Pbam)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Ludwigite group

Optical Properties

Color

rotbraun

Streak color

bräunlich

RI value α / ω / n

2.2

Ri mean

2.2

2V angle

Biaxial

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

55

Space Group

Pbam

Cell parameters a (Å)

9.213

Cell parameters b (Å)

12.229

Cell parameters c (Å)

3.001

Cell parameters a/b or c/a

0.753

Cell parameters c/b

0.245

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volume (ų)

338.11

X-Ray Powder Diffraction

5.10(50),
4.61(40),
2.548(100),
2.514(100),
2.334(30),
2.114(20),
2.025(30),
1.898(50)
XRD chart Bonaccordite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

7

VHN (Hardness Vickers)

1200 (15g)

Density (g/cm³)

5.17 (berechnet)

5.187 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Südafrika/Mpumalanga, Provinz/Ehlanzeni, Distrikt/Barberton/Scotia Talkgrube

Südafrika/Mpumalanga, Provinz/Ehlanzeni, Distrikt/Barberton/Bon Accord Lagerstätte

Preface

Author (Name, Year)

De Waal & Viljoen & Calk, 1974

References

Transactions of the Geological Society of South Africa 77 (1974), 375

IMA group assignments

Other languages

German

Bonaccordit

Spanish

Bonaccordita

French

Bonaccordite

English

Bonaccordite

Russian

Бонаккордит

CNMNC (IMA)-Number

IMA 1974-019

CNMNC symbol

Symbol

Bna

Locations with GPS information

IDs

GUSID (Global unique identifier short form) 33k0FZ0wcE6v2QR3ArzhkQ
GUID (Global unique identifier) 153479DF-309D-4E70-AFD9-047702BCE191
Database ID 445