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Platarsite

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Platarsit in ged. Platin
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Platarsit in ged. Platin
schwarze Einschlüsse von Platarsit in ged. Platin, Goodnews Bay, Bethel Borough, Alaska, USA; BB ~ 3 mm
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: USA/Alaska/Bethel Borough/Goodnews Bay
Mineral: Platarsite
Image: 1592042900
License: Usage for Mineralienatlas project only
Platarsit in ged. Platin

schwarze Einschlüsse von Platarsit in ged. Platin, Goodnews Bay, Bethel Borough, Alaska, USA; BB 3 mm
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-06-13
Locality: Goodnews Bay / Bethel Borough / Alaska / USA

Collectors Summary

Color grau
Lustre Metallglanz
Hardness (Mohs) 7.5
Crystal System kubisch, Pa3

Chemism

Chemical formula

(Pt,Rh,Ru)AsS

Empirical formula (analysis)

(Pt0.34Rh0.30Ru0.28Ir0.05)As1.04S0.99

Chemical composition

Arsen, Platin, Rhodium, Ruthenium, Schwefel

Unit weight: 244.77257468 u; Number of atoms in the formula: 3

Info

Empirical formula:

(Pt0.34Rh0.30Ru0.28Ir0.05)As1.04S0.99

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Sulfur

S

12.97

0.99

33.00

32.0655000

31.7448450
Arsenic

As

31.83

1.04

34.67

74.9216020

77.9184661
Ruthenium

Ru

11.56

0.28

9.33

101.0720000

28.3001600
Rhodium

Rh

12.61

0.3

10.00

102.9055020

30.8716506
Iridium

Ir

3.93

0.05

1.67

192.2173000

9.6108650
Platinum

Pt

27.10

0.34

11.33

195.0782000

66.3265880

Analysis wt%

Ø Pt : 29.20, Rh : 11.50, Ru : 10.00, Ir : 4.80, Os : 0.40, As : 32.70, S : 11.50, PLT : 55.90 (Ref: Canadian Mineralogist 77)

Strunz 9th edition incl. updates

2.EB.25

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfoarsenide, Sulfoantimonide, Sulfobismuthide)
E: Metallsulfide mit M:S >= 1:2
B: M:S = 1:2, mit Fe, Co, Ni, PGE, usw.
25:Gersdorffit-Gruppe

Lapis Classification

II/D.18-070

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
D: Sulfide mit Metall : S,Se,Te < 1:1
18: Cobaltit-Gruppe

Classification by Hölzel

2.EB.580

2: SULFIDES
E: Me/S=1/2 (also < 1/2)
B: With Fe,Co,Ni,PGE Pyrite, Marcasite Family
5: Michenerite-Group

Dana 8th edition

02.12.03.06

02: Sulfide Minerals
12: Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=1:2
03: Cobaltite Group (Cubic or pseudocubic crystals)

IMA status

Diskreditiert von der CNMNC, proposal 23-A, März 2023; S-reiche Varietät von Sperrylith

Mineral status

diskreditiert

IMA Classification

IMA Classification

 Cobaltite group

Optical Properties

Color

grau

Change in color

in polierten Sektionen grau

Diaphaneity (Transparency)

opak

Lustre

Metallglanz

Reflectivity: (Lambda nm) ↓, ↑, Ø

(420) 47.70, , 47.70
(440) 47.40, , 47.40
(460) 47.30, , 47.30
(480) 47.30, , 47.30
(500) 47.10, , 47.10
(520) 47.50, , 47.50
(540) 48.00, , 48.00
(560) 48.20, , 48.20
(580) 48.70, , 48.70
(600) 49.00, , 49.00
(620) 49.90, , 49.90
(640) 48.90, , 48.90
(660) 49.50, , 49.50
(680) 49.80, , 49.80
(700) 49.60, , 49.60
Reflection chart Platarsite

Reflectivity Ø

48.39

Crystallography

Crystal System

kubisch

Class (H-M)

m3

Space Group number

205

Space Group

Pa3

Cell parameters a (Å)

5.788

Cell parameters b (Å)

-

Cell parameters c (Å)

-

Cell parameters a/b or c/a

1

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volume (ų)

193.903

X-Ray Powder Diffraction

3.345(80),
2.896(90),
2.590(50),
2.364(50),
2.047(60),
1.746(100),
1.182(50),
1.114(70)
XRD chart Platarsite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

7.5

VHN (Hardness Vickers)

1486 (50g) Ø, 1402 (100g)

Density (g/cm³)

8.437 (berechnet) 8 (gemessen)

8.384 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Südafrika/Limpopo, Provinz/Sekhukhune, Distrikt/Fetakgomo Tubatse Local Municipality/Steelpoort/Onverwacht Mine

Preface

Author (Name, Year)

Cabri & Laflamme & Stewart, 1977

References

Canadian Mineralogist 15 (1977), 385

Canadian Mineralogist 17 (1979), 117

IMA group assignments

 
Cobaltite group
 
 
 

 
 
Andrieslombaardite
RhSbS
kubisch
P213

 
 
Changchengite
IrBiS
kubisch
P213

 
 
Cobaltite
CoAsS
orthorhombisch
Pc21b

 
 
Gersdorffite
NiAsS
kubisch
P213

 
 
Hollingworthite
(Rh,Pt,Pd)AsS
kubisch
Pa3

 
 
Irarsite
(Ir,Ru,Rh,Pt)AsS
kubisch
Pa3

 
 
Jolliffeite
(Ni,Co)AsSe
kubisch
Pa3

 
 
Kalungaite
PdAsSe
kubisch
Pa3

 
 
Maslovite
PtBiTe
kubisch
P213

 
 
Mayingite
IrBiTe
kubisch
Pa3

 
 
Michenerite
PdBiTe
kubisch
P213

 
 
Milotaite
PdSbSe
kubisch
P213

 
 
Padmaite
PdBiSe
kubisch
P213

 
 
Platarsite
(Pt,Rh,Ru)AsS
kubisch
Pa3

 
 
Testibiopalladite
PdSbTe
kubisch
P213

 
 
Tolovkite
IrSbS
kubisch
Pa3

 
 
Ullmannite
NiSbS
kubisch
P213

 
 
UM1991-19-Se:AsCo
 
 
 

 
 
Willyamite
(Co,Ni)SbS
orthorhombisch
Pca21

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Actuality: 13. May 2025 - 10:53:15

Other languages

German

Platarsit

Spanish

Platarsita

French

Platarsite

English

Platarsite

Russian

Платарсит

Alternative Name

Rh-Sperrylite

CNMNC (IMA)-Number

IMA 1976-050

CNMNC symbol

Symbol

Plt

Locations with GPS information

IDs

GUSID (Global unique identifier short form) Cfig7hww60CQVZGsWsOAXA
GUID (Global unique identifier) EEA0F809-301C-40EB-9055-91AC5AC3805C
Database ID 3075