https://www.mineralbox.biz
https://www.mineral-bosse.de
https://www.edelsteine-neuburg.de
https://www.mineraliengrosshandel.com
'._('einklappen').'
 

Radtkeite (Radtkeit)

Collectors Summary

Color gelborange, bräunlichschwarz
Streak color gelborange, orangebraun
Lustre Diamantglanz
Hardness (Mohs) 2.00 - 3.00
Cleavages vollkommen {010}, sehr gut {001},{100}, gut {0kl},{h0l},{hk0}
Solubility + starke Säuren, - HF, Sonnenlicht!!
Crystal System monoklin, C2/m

Chemism

Chemical formula

Hg3S2ClI

Chemical composition

Chlor, Quecksilber, Iod, Schwefel

Unit weight: 828.264673 u; Number of atoms in the formula: 7

Info

Empirical formula:

Hg3S2ClI

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Sulfur

S

7.74

2

28.57

32.0655000

64.1310000
Chlorine

Cl

4.28

1

14.29

35.4532000

35.4532000
Iodine

I

15.32

1

14.29

126.9044730

126.9044730
Mercury

Hg

72.66

3

42.86

200.5920000

601.7760000

Strunz 9th edition incl. updates

2.FC.25

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
F: Sulfide, Arsenide, Alkaide; Sulfide mit Halogeniden, Oxiden, Hydroxiden (H2O)
C: mit Cl, Br, I (Halide-Sulfide)
25:Radtkeit-Gruppe

Lapis Classification

II/F.14-030

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

Classification by Hölzel

2.KB.130

2: SULFIDES
K: Nonmetallic Sulfides, HalideSulfides, etc.
B: With Cl,(Br,I)
1: Corderoite-Lavrentievite-Group

Dana 8th edition

10.03.06.01

10: Oxyhalides and Hydroxyhalides
03: Oxyhalides and Hydroxyhalides where (A)3 (O,OH)2 Xq

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

gelborange, bräunlichschwarz

Streak color

gelborange, orangebraun

Diaphaneity (Transparency)

opak, durchscheinend

Lustre

Diamantglanz

RI value α / ω / n

> 2

RI value β

> 2

RI value γ / ε

> 2

2V angle

Biaxial (+) 35°

Pleochroism

ausgeprägt in Schattierungen von Orange

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell parameters a (Å)

16.827

Cell parameters b (Å)

9.117

Cell parameters c (Å)

13.165

Cell parameters a/b or c/a

1.846

Cell parameters c/b

1.444

Cell parameters α

90°

Cell parameters β

130.17°

Cell parameters γ

90°

Z

8

Volumne (ų)

1543.295

X-Ray Powder Diffraction

3.90(40),
3.73(20),
2.96(20),
2.71(40),
2.64(100),
2.58(30),
2.53(30),
2.281(30)
XRD chart Radtkeite

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)

2.00 - 3.00

VHN (Hardness Vickers)

70

Density (g/cm³)

7.0 (gemessen) 7.13 (berechnet)

7.129 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {010}, sehr gut {001},{100}, gut {0kl},{h0l},{hk0}

Instability

+ starke Säuren, - HF, Sonnenlicht!!

(Co-)Type locality

(Co-)Type locality

USA/Nevada/Humboldt Co./Opalite District/McDermitt Mine (Cordero Mine)

Preface

Name from

Arthur Sears Radtke (1936–2004)

Author (Name, Year)

McCormack & Dickson & Leshendok, 1991

References

American Mineralogist 76 (1991), 1715

Other languages

German

Radtkeit

English

Radtkeite

French

Radtkeite

Spanish

Radtkeíta

Russian

Радкеит

CNMNC (IMA)-Number

IMA 1989-030

CNMNC symbol

Symbol

Rdk

Locations with GPS information