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Braggite

Collectors Summary

Color weiß
Hardness (Mohs) 6.5
Crystal System tetragonal, P42/m

Chemism

Chemical formula

PdPt3S4

Empirical formula (analysis)

Pt0.63Pd0.24Ni0.12S1.01

Chemical composition

Palladium, Platin, Schwefel

Unit weight: 187.8696714 u; Number of atoms in the formula: 2

Info

Empirical formula:

Pt0.63Pd0.24Ni0.12S1.01

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Sulfur

S

17.24

1.01

50.50

32.0655000

32.3861550
Nickel

Ni

3.75

0.12

6.00

58.6934200

7.0432104
Palladium

Pd

13.60

0.24

12.00

106.4210000

25.5410400
Platinum

Pt

65.42

0.63

31.50

195.0782000

122.8992660

Analysis wt%

Ø Pt : 56.40, Pd : 20.30, Ni : 5.10, S : 18.20, PLT : 76.70 (Ref: American Mineralogist 78)

Strunz 9th edition incl. updates

2.CC.30

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
C: Metallsulfide, M : S = 1 : 1 (und ähnliche)
C: mit Nickel (Ni), Eisen (Fe), Cobalt (Co), usw.
30:Braggit-Gruppe

Lapis Classification

II/C.25-020

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
C: Sulfide mit Metall : S,Se,Te ~ 1:1

Classification by Hölzel

2.CC.110

2: SULFIDES
C: Sulfides (etc) with Me/S=1/1
C: With Pd,Pt, etc. - Coordination Number ~[4], Planar
1: Braggite-Group

Dana 8th edition

02.08.05.03

02: Sulfide Minerals
08: Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=1:1
05: Cooperite Group

IMA status

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

Mineral status

anerkanntes Mineral

Optical Properties

Color

weiß

Diaphaneity (Transparency)

opak

Crystallography

Crystal System

tetragonal

Class (H-M)

4/m

Space Group number

84

Space Group

P42/m

Cell parameters a (Å)

6.367

Cell parameters b (Å)

-

Cell parameters c (Å)

6.561

Cell parameters a/b or c/a

1.030

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

8

Volumne (ų)

265.974

X-Ray Powder Diffraction

3.71(50),
2.914(90),
2.848(100),
2.649(50),
2.610(80),
1.854(70),
1.731(50),
1.714(60)
XRD chart Braggite

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)

997 (100g)

Density (g/cm³)

9.38 (berechnet)

9.383 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Südafrika/Limpopo, Provinz/Eastern Bushveld Complex/Mokopane (Potgietersrus)/Rustenburg Lagerstätte/Rustenburg Town & Townlands Mine

Preface

Author (Name, Year)

Bannister & Hey, 1932

References

Handbook of Mineralogy (Anthony et al.), 1 (1990), 67

Probosal 22-E - CNMNC Newsletter 69; Mineralogical Magazine, 86, https://doi.org/10.1180/mgm. 2022.115 [Formula redefined]

Roland K.W. Merkle, Sabine M.C. Verryn - Cooperite and braggite from the Bushveld Complex: implications for the miscibility gap and identification - Miner Deposita (2003) 38: 381–388DOI 10.1007/s00126-003-0347-2

Other languages

German

Braggit

Spanish

Braggita

French

Braggite

English

Braggite

Russian

Брэггит

Simplified Chinese

硫镍钯铂矿

CNMNC symbol

Symbol

Bg

Locations with GPS information

IDs

GUSID (Global unique identifier short form) ulRRZIHhBU-zxH2g11BWxA
GUID (Global unique identifier) 645154BA-E181-4F05-B3C4-7DA0D75056C4
Database ID 476