ALMOST THERE!. Help us with a final push needed to keep mindat.org running. Click here to help.
Catawiki are hosting a mindat.org benefit auction. All proceeds to mindat.org! BID NOW
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat Articles
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Brodtkorbite

This page is currently not sponsored. Click here to sponsor this page.
Formula:
Cu2HgSe2
Colour:
Dark grey
Lustre:
Metallic
Hardness:
2½ - 3
Specific Gravity:
7.77 (Calculated)
Crystal System:
Monoclinic
Name:
For Dr. Milka Kronegold de Brodtkorb (1932-), Professor at the Universities of Buenos Aires and La Plata, Argentina, for her contributions to mineralogy (especially that of Argentina) and economic geology.
This page provides mineralogical data about Brodtkorbite.


Hide all sections | Show all sections

Classification of BrodtkorbiteHide

Approved
Approval Year:
1999
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

Physical Properties of BrodtkorbiteHide

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

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%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. 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 BrodtkorbiteHide

Formula:
Cu2HgSe2

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

Powder Diffraction Data:
d-spacingIntensity
3.991 (70)
3.576 (50)
3.534 (50)
3.414 (50)
2.730 (100)
2.223 (70)
2.072 (50)
_312)(

Type Occurrence of BrodtkorbiteHide

General Appearance of Type Material:
Anhedral grains from 10x20 µm to 50 x 100 µm and aggregates reaching 150 x 250 µm
Geological Setting of Type Material:
In a telethermal selenide vein-type assemblage
Associated Minerals at Type Locality:

Synonyms of BrodtkorbiteHide

Other Language Names for BrodtkorbiteHide

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

Related Minerals - Nickel-Strunz GroupingHide

2.BD.UM2004-33-S:AgCuHgSe(Ag,Cu)8Hg3(S,Se)7
2.BD.05ImiteriteAg2HgS2Mon.
2.BD.10GortdrumiteCu24Fe2Hg9S23Tric. 1 : P1
2.BD.15BalkaniteCu9Ag5HgS8Mon. 2/m : P2/m
2.BD.15Danielsite(Cu,Ag)14HgS8Orth.
2.BD.20DonharrisiteNi3HgS3Mon. 2/m : B2/m
2.BD.25CarliniteTl2STrig. 3 : R3
2.BD.30BukoviteTl2(Cu,Fe)4Se4Tet.
2.BD.30MurunskiteK2(Cu,Fe)4S4Tet.
2.BD.30ThalcusiteTl2Cu3FeS4Tet.
2.BD.35Rohaite(Tl,Pb,K)2Cu8.7Sb2S4Orth.
2.BD.40ChalcothalliteTl2(Cu,Fe)6SbS4Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
2.BD.45SabatieriteCu6TlSe4Orth.
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.

References for BrodtkorbiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Canadian Mineralogist: 40: 225-237.

Internet Links for BrodtkorbiteHide

Localities for BrodtkorbiteHide

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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Argentina (TL)
 
  • La Rioja
    • General Lamadrid department
      • Villa Castelli
        • Sierra de Cacho
Canadian Mineralogist(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); de Brodtkorb, M. K., & Crosta, S. (2010). Reseña de la ubicación geográfica de los seleniuros de la Sierra de Umango, provincia de La Rioja. Revista de la Asociación Geológica Argentina, 67(2), 272-279.
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2018, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: December 12, 2018 07:20:36 Page generated: November 19, 2018 06:02:35
Go to top of page