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Radhakrishnaite (Radhakrishnait)

Collectors Summary

Color rötlichbraun
Crystal System tetragonal,

Chemism

Chemical formula

PbTe3(Cl,S)2

Chemical composition

Blei, Chlor, Tellur, Schwefel

Unit weight: 659.23155 u; Number of atoms in the formula: 6

Info

Empirical formula:

PbTe3(Cl0.75S0.25)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Sulfur

S

2.43

0.5

8.33

32.0655000

16.0327500
Chlorine

Cl

8.07

1.5

25.00

35.4532000

53.1798000
Tellurium

Te

58.07

3

50.00

127.6030000

382.8090000
Lead

Pb

31.43

1

16.67

207.2100000

207.2100000

Analysis wt%

Pb : 31.39, Te : 58.23, Cl : 7.18, S : 3.09 (Ref: Canadian Mineralogist 85)

Strunz 9th edition incl. updates

3.AA.50

3: Halide (Fluoride, Chloride, Bromide, Iodide)
A: Einfache Halogenide ohne H2O
A: M:X = 1:1 und 2:3
50:Radhakrishnait-Gruppe

Lapis Classification

II/F.15-020

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
F: Sulfide mit nichtmetallischem Charakter
15: Halogensulfide (Sulfohalide) mit Quecksilber/Blei und verwandte Verbindungen

Classification by Hölzel

3.ED.140

3: HALIDES
E: Halides with mostly Pb,As,Sb,Bi,Te
D: With Te

Dana 8th edition

02.15.04.01

02: Sulfide Minerals
15: Sulfides - Including Selenides and Tellurides (Chlorides)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

rötlichbraun

Crystallography

Crystal System

tetragonal

Cell parameters a (Å)

5.71

Cell parameters b (Å)

-

Cell parameters c (Å)

3.77

Cell parameters a/b or c/a

0.660

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

1

Volumne (ų)

122.917

X-Ray Powder Diffraction

3.78(60),
3.16(100),
2.73(40),
2.29(40),
2.04(30),
1.92(50),
1.78(50),
1.59(40)
XRD chart Radhakrishnaite

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

Physical Properties

Density (g/cm³)

8.89 (berechnet)

8.905 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Indien/Karnataka/Kolar, Distrikt/Kolar Gold Fields

Indien/Karnataka/Kolar, Distrikt/Kolar Gold Fields/Zentraler Schiefer-Gürtel/Champion Lode

Preface

Author (Name, Year)

Genkin & Safanov & Vasudev & Rao & Boronikhin & Vyal'sov & Gorshkov &

References

Canadian Mineralogist 23 (1985), 501

Other languages

German

Radhakrishnait

English

Radhakrishnaite

French

Radhakrishnaite

Spanish

Radhakrishnaíta

Russian

Радхакришнаит

Simplified Chinese

硫碲铅矿

CNMNC (IMA)-Number

IMA 1983-082

CNMNC symbol

Symbol

Rhk

Locations with GPS information