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Brodtkorbite

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Formula:
Cu
 
2
HgSe
 
2
System:MonoclinicColour:Dark grey
Lustre:MetallicHardness:2½ - 3
Name:For Dr. Milka Kronegold de Brodtkorb
This page provides mineralogical data about Brodtkorbite.

Classification of Brodtkorbite

IMA status:Approved 1999
Nickel-Strunz 10th (pending) edition ID:2.BD.55

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
D : With Hg, Tl
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Type Occurrence of Brodtkorbite

Type Locality:Tumiñico Mine, Sierra de Cacho, Sierra de Umango, La Rioja, Argentina
General Appearance of Type Material:Anhedral grains from 10x20 µm to 50 x 100 µm and aggregates reaching 150 x 250 µm
Year of Discovery:1999
Geological Setting of type material:In a telethermal selenide vein-type assemblage
Associated Minerals at type locality:
UraniniteUmangiteKrut'aite-Trogtalite SeriesTiemanniteTiemannite
Mercurian CadmoseliteKlockmanniteHakiteFerroseliteEucairite
EskeborniteCuprian CadmoseliteChaméaniteBellidoite

Physical Properties of Brodtkorbite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Dark grey
Streak:Dark grey
Hardness (Mohs):2½ - 3
Hardness (Vickers):VHN10=118 kg/mm2
Tenacity:Brittle
Cleavage:None Observed
Fracture:Irregular/Uneven
Density (calculated):7.77 g/cm3

Crystallography of Brodtkorbite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/m {P1 1 21/m} {P21/m} {P1 21/m 1}
Cell Parameters:a = 7.492Å, b = 4.177Å, c = 7.239Å
β = 114.2°
Ratio:a:b:c = 1.794 : 1 : 1.733
Unit Cell Volume:V 206.6 ų
Z:2
X-Ray Powder Diffraction:
d-spacingIntensity
3.991 (70)
3.576 (50)
3.534 (50)
3.414 (50)
2.730 (100)
2.223 (70)
2.072 (50)
_312)(

Optical Data of Brodtkorbite

Type:Anisotropic
Anisotropism:Weak to strong
Bireflectance:Strong
Reflectivity:
470nmR1=29.60%R2= 37.10%imR1= 15.15%imR2= 22.00%
546nmR1=27.40%R2= 35.10%imR1= 13.30%imR2= 20.15%
589nmR1=26.60%R2= 34.60%imR1= 12.70%imR2= 19%
650nmR1=26.10%R2= 34.10%imR1= 12.30%imR2= 19.25%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 37.10%.
R1 shown in black, R2 shown in red, imR1 shown in green, imR2 shown in blue
Colour in reflected light:White
Pleochroism:Visible
Comments:Weak to Moderate

Chemical Properties of Brodtkorbite

Formula:
Cu
 
2
HgSe
 
2
Essential elements:Cu, Hg, Se
All elements listed in formula:Cu, Hg, Se

Relationship of Brodtkorbite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.BD.UM2004-33-S:AgCuHgSe
(Ag,Cu)
 
8
Hg
 
3
(S,Se)
 
7
2.BD.05Imiterite
Ag
 
2
HgS
 
2
2.BD.10Gortdrumite
(Cu,Fe)
 
6
Hg
 
2
S
 
5
2.BD.15Balkanite
Cu
 
9
Ag
 
5
HgS
 
8
2.BD.15Danielsite
(Cu,Ag)
 
14
HgS
 
8
2.BD.20Donharrisite
Ni
 
8
Hg
 
3
S
 
9
2.BD.25Carlinite
Tl
 
2
S
2.BD.30Bukovite
Tl
 
2
(Cu,Fe)
 
4
Se
 
4
2.BD.30Murunskite
K
 
2
(Cu,Fe)
 
4
S
 
4
2.BD.30Thalcusite
Tl
 
2
Cu
 
3
FeS
 
4
2.BD.35Rohaite
(Tl,Pb,K)
 
2
Cu
 
8.7
Sb
 
2
S
 
4
2.BD.40Chalcothallite
Tl
 
2
(Cu,Fe)
 
6
SbS
 
4
2.BD.45Sabatierite
Cu
 
6
TlSe
 
4
2.BD.50Crookesite
Cu
 
7
(Tl, Ag)Se
 
4

Other Names for Brodtkorbite

Synonyms:
IMA1999-023
Other Languages:
German:Brodtkorbit
Spanish:Brodtkorbita

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 Brodtkorbite

Reference List:

- +
Canadian Mineralogist: 40: 225-237.

Internet Links for Brodtkorbite

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  • Raman and XRD data at RRUFF project
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    • Localities for Brodtkorbite

    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.
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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.
    Argentina
     
    • La Rioja
      • Sierra de Umango
        • Sierra de Cacho
    		Can.Min.(2002) 40, 225-237; Milka K. de Brodtkorb (2002) Las Especies Minerales de la Republica Argentina. Vol. 1 (elements, sulphides and sulphosalts). (Asociacion Mineralogica Argentina)
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 21st Jun 2011 15:06:54
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