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Radtkeite

Formula:
Hg
2+
3
[Cl|I|S
 
2
]
System:OrthorhombicColour:Yellow-orange, darkening ...
Hardness:2 - 3
Name:Named after Arthur S. Radtke, geologist of Palo Alto, California, USA.
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.25

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
[Cl|I|S
 
2
]
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
(Cu,Fe,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
 
3
Fe
 
10
S
 
14
2.FC.10Chlorbartonite
K6Fe24S26(Cl,S)
2.FC.15Arzakite
Hg
2+
3
[(Br,Cl)
 
2
|S
 
2
]
2.FC.15Corderoite
Hg
2+
3
[Cl
 
2
|S
 
2
]
2.FC.15Lavrentievite
Hg
2+
3
[(Cl,Br)
 
2
|S
 
2
]
2.FC.20Grechishchevite
Hg
2+
3
[(Br,Cl,I)
 
2
|S
 
2
]
2.FC.20Kenhsuite
Hg
2+
3
[Cl
 
2
|S
 
2
]
2.FC.30Capgaronnite
HgS·Ag(Cl,Br,I)
2.FC.30Iltisite
HgSAg(Cl,Br)
2.FC.35Perroudite
Hg
 
5-x
Ag
 
4+x
S
 
5-x
(Cl,I,Br)
 
4+x
Related Minerals - Hey's Index Grouping:
6.5.1Corderoite
Hg
2+
3
[Cl
 
2
|S
 
2
]
6.5.2Arzakite
Hg
2+
3
[(Br,Cl)
 
2
|S
 
2
]
6.5.3Lavrentievite
Hg
2+
3
[(Cl,Br)
 
2
|S
 
2
]
6.5.4Grechishchevite
Hg
2+
3
[(Br,Cl,I)
 
2
|S
 
2
]
6.5.6Capgaronnite
HgS·Ag(Cl,Br,I)
6.5.7Perroudite
Hg
 
5-x
Ag
 
4+x
S
 
5-x
(Cl,I,Br)
 
4+x
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
(Cu,Fe,Ni)
 
25
S
 
26
Cl
6.5.12Thalfenisite
Tl
 
6
(Fe,Ni,Cu)
 
25
S
 
26
Cl

Other Names for Radtkeite

Synonyms:
IMA1989-030
German names:
Radtkeit
Russian names:
Радкеит
Spanish names:
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

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Radtkeite in the Natural History Museum (London) online catalogue
  • Radtkeite details from Handbook of Mineralogy (PDF)
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    Localities for Radtkeite

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    (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)
    Mineral and/or Locality
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