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Brodtkorbite

A valid IMA mineral species
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09581780017271928736873.jpg
photo of Milka de Brodtkorb
Formula:
Cu2HgSe2
Colour:
Dark grey
Lustre:
Metallic
Hardness:
2½ - 3
Specific Gravity:
7.77 (Calculated)
Crystal System:
Monoclinic
Name:
Named in honor of Milka Kronegold de Brodtkorb (05 July 1932, Ciudad de Buenos Aires, Argentina - 18 July 2019, Córdoba, Argentina), Professor at the Universities of Buenos Aires and La Plata, Argentina, for her contributions to mineralogy (especially that of Argentina) and economic geology. She coauthored the description of four minerals: suredaite, angelaite, jagueite, coiraite.
This page provides mineralogical data about Brodtkorbite.


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Unique IdentifiersHide

Mindat ID:
7090
Long-form identifier:
mindat:1:1:7090:0

IMA Classification of BrodtkorbiteHide

Classification of BrodtkorbiteHide

Strunz-mindat (2026):
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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

SymbolSourceReference for Standard
BdkIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
BdkThe Canadian Mineralogist (2019)The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download

Physical Properties of BrodtkorbiteHide

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

Optical Data of BrodtkorbiteHide

Anisotropism:
Weak to strong; mauve-gray to yellowish gray.
Bireflectance:
Weak to strong.
Reflectivity:
WavelengthR1 (%)R2 (%)imR1 (%)imR2 (%)
470nm29.60% 37.10% 15.15% 22.00%
546nm27.40% 35.10% 13.30% 20.15%
589nm26.60% 34.60% 12.70% 19.80%
650nm26.10% 34.10% 12.30% 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
Internal Reflections:
None
Pleochroism:
Visible
Comments:
Weak to moderate; pale pink to pale blue.

Chemistry of BrodtkorbiteHide

Mindat Formula:
Cu2HgSe2
Element Weights:
Element% weight
Hg41.308 %
Se32.521 %
Cu26.172 %

Calculated from ideal end-member formula.
Elements listed:
Cu, Hg, Se - search for minerals with similar chemistry

Crystallography of BrodtkorbiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Cell Parameters:
a = 7.492 Å, b = 4.177 Å, c = 7.239 Å
β = 114.2°
Ratio:
a:b:c = 1.794 : 1 : 1.733
Unit Cell V:
206.6 ų
Z:
2

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Near-surface Processes
23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47)
High-? alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])

Type Occurrence of BrodtkorbiteHide

Synonyms of BrodtkorbiteHide

Other Language Names for BrodtkorbiteHide

Simplified Chinese:硒汞铜矿
Spanish:Brodtkorbita
Traditional Chinese:硒汞銅礦

Related Minerals - Strunz-mindat GroupingHide

2.BD.VrančiceiteCu10Hg3S8Tric. 1 : P1
2.BD.'UM2004-33-S:AgCuHgSe'(Ag,Cu)8Hg3(S,Se)7
2.BD.05ImiteriteAg2HgS2Mon. 2/m : P21/b
2.BD.10GortdrumiteCu24Fe2Hg9S23Tric. 1 : P1
2.BD.15Danielsite(Cu,Ag)14HgS8Orth.
2.BD.15BalkaniteCu9Ag5HgS8Mon. 2/m : P2/m
2.BD.20DonharrisiteNi3HgS3Mon. 2/m : B2/m
2.BD.25CarliniteTl2STrig. 3 : R3
2.BD.30Bukovite(Cu3Fe)Σ4Tl2Se4Tet. 4/mmm(4/m2/m2/m) : I4/mmm
2.BD.30ThalcusiteTl2Cu3FeS4Tet.
2.BD.30MurunskiteK2(Cu,Fe)4S4Tet. 4/mmm(4/m2/m2/m) : I4/mmm
2.BD.35Rohaite(Tl,Pb,K)2Cu8.7Sb2S4Orth.
2.BD.40ChalcothalliteTl2(Cu,Fe)6SbS4Tet. 4/mmm(4/m2/m2/m) : I4/mmm
2.BD.45SabatieriteTlCu6Se4Orth.
2.BD.50CrookesiteCu7(Tl, Ag)Se4Tet.

Other InformationHide

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

Internet Links for BrodtkorbiteHide

References for BrodtkorbiteHide

Localities for BrodtkorbiteHide

Showing 4 localities.

This 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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Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Argentina (TL)
 
  • La Rioja Province
    • General Lamadrid Department
      • Villa Castelli
        • Sierra de Cacho
Canadian Mineralogist (2002) +3 other references
Czech Republic
 
  • Central Bohemian Region
Škácha et al. (2017)
      • Příbram
        • Bytíz
Škácha (2015)
Peru
 
  • Arequipa
    • Condesuyos Province
      • Rio Grande district
Alfonso et al. (2023)
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