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Radtkeite

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Formula:
Hg
2+
3
S
 
2
ICl
System:OrthorhombicColour:Yellow-orange, darkening ...
Hardness:2 - 3
Name:Named in 1991 by John K. McCormack. Frank W. Dickson, and Maureen P. Leshendok in honor of Arthur S. Radtke, geologist of Palo Alto, California, USA in recognition of his long-term research of Carlin-type disseminated gold deposits.
This page provides mineralogical data about Radtkeite.

Classification of Radtkeite

IMA status:Approved
Strunz 8th edition ID:2/F.14-30
Nickel-Strunz 10th (pending) edition ID:2.FC.15d

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
F : Sulfides of arsenic, alkalies; sulfides with halide, oxide, hydroxide, H2O
C : With Cl, Br, I (halide-sulfides)
Dana 8th edition ID:10.3.6.1

10 : OXYHALIDES AND HYDROXYHALIDES
3 : A3(O,OH)2Xq
Hey's CIM Ref.:6.5.5

6 : Sulphosalts - Sulphostannates, Sulphogermanates,Sulpharsenates, Sulphantimonates, Sulphovanadates and Sulphohalides
5 : Sulphohalides
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Type Occurrence of Radtkeite

Type Locality:McDermitt Mine (Cordero Mine; Old Cordero Mine), Opalite District, Humboldt Co., Nevada, USA
Year of Discovery:1991

Physical Properties of Radtkeite

Lustre:Sub-Adamantine
Colour:Yellow-orange, darkening on exposure
Streak:Yellow-orange
Hardness (Mohs):2 - 3

Crystallography of Radtkeite

Crystal System:Orthorhombic
Cell Parameters:a = 16.92Å, b = 20.25Å, c = 9.11Å
Ratio:a:b:c = 0.836 : 1 : 0.45
Unit Cell Volume:V 3,121.36 ų (Calculated from Unit Cell)

Optical Data of Radtkeite

Type:Biaxial (+)
Dispersion:relatively weak

Chemical Properties of Radtkeite

Formula:
Hg
2+
3
S
 
2
ICl
Simplified for copy/paste:Hg2+3S2ICl
Essential elements:Cl, Hg, I, S
All elements listed in formula:Cl, Hg, I, S

Relationship of Radtkeite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.FC.05Djerfisherite
K
 
6
(Fe,Cu,Ni)
 
25
S
 
26
Cl
2.FC.05Thalfenisite
Tl
 
6
(Fe,Ni,Cu)
 
25
S
 
26
Cl
2.FC.05Owensite
(Ba,Pb)
 
6
(Cu,Fe,Ni)
 
25
S
 
27
2.FC.10Bartonite
K
 
6
Fe
 
20
S
 
26
S
2.FC.10Chlorbartonite
K
 
6
Fe
 
24
S
 
26
(Cl,S)
2.FC.15aArzakite
Hg
2+
3
S
 
2
(Br,Cl)
 
2
2.FC.15aCorderoite
Hg
2+
3
S
 
2
Cl
 
2
2.FC.15cGrechishchevite
Hg
2+
3
S
 
2
(Br,Cl,I)
 
2
2.FC.15aLavrentievite
Hg
2+
3
S
 
2
(Cl,Br)
 
2
2.FC.15bKenhsuite
Hg
2+
3
S
 
2
Cl
 
2
2.FC.20aCapgaronnite
HgAgS(Cl,Br,I)
2.FC.20cPerroudite
Hg
 
5
Ag
 
4
S
 
5
(I,Br)
 
2
Cl
 
2
2.FC.20bIltisite
HgAgS(Cl,Br)
2.FC.25Demicheleite-(Br)
BiSBr
2.FC.25Demicheleite-(Cl)
BiSCl
Related Minerals - Hey's Index Grouping:

- +
6.5.1Corderoite
Hg
2+
3
S
 
2
Cl
 
2
6.5.2Arzakite
Hg
2+
3
S
 
2
(Br,Cl)
 
2
6.5.3Lavrentievite
Hg
2+
3
S
 
2
(Cl,Br)
 
2
6.5.4Grechishchevite
Hg
2+
3
S
 
2
(Br,Cl,I)
 
2
6.5.6Capgaronnite
HgAgS(Cl,Br,I)
6.5.7Perroudite
Hg
 
5
Ag
 
4
S
 
5
(I,Br)
 
2
Cl
 
2
6.5.8Ardaite
Pb
 
19
Sb
 
13
S
 
35
Cl
 
7
6.5.9Dadsonite
Pb
 
23
Sb
 
25
S
 
60
Cl
6.5.10Radhakrishnaite
PbTe
 
3
(Cl,S)
 
2
6.5.11Djerfisherite
K
 
6
(Fe,Cu,Ni)
 
25
S
 
26
Cl
6.5.12Thalfenisite
Tl
 
6
(Fe,Ni,Cu)
 
25
S
 
26
Cl

Other Names for Radtkeite

Synonyms:
IMA1989-030
Other Languages:
German:Radtkeit
Russian:Радкеит
Spanish:Radtkeita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Radtkeite

Reference List:

- +
American Mineralogist: 76: 1715-1721.

Internet Links for Radtkeite

Search Engines:
  • Look for Radtkeite on Google
  • Look for Radtkeite images on Google
  • External Links:
  • Look for Radtkeite on Webmineral
  • Look for Radtkeite on Athena Mineralogy
  • Look for Radtkeite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Radtkeite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
  • rare and unusual minerals mainly crystallized
  • The Arkenstone - Fine Minerals
  • Buy from McDougall Minerals
  • Buy fine minerals and gemstones from Pala International
  • Fabre Minerals - search for Radtkeite specimens
  • Fine and rare minerals from mintreasure.com
  • Buy rare minerals from Excalibur Minerals
  • Wilensky Fine Minerals
  • Fine minerals from bisbeeborn.com
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Find Radtkeite on www.crystalclassics.co.uk
  • Lapis Mineral Magazin
  • Localities for Radtkeite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    USA
     
    • Nevada
      • Humboldt Co.
        • Opalite District
    AM 76 (1991), 1715; HB3 (1997); NM 90-94 (1997)
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