Brodtkorbite Mineral Data (original) (raw)

General Brodtkorbite Information

Help on Chemical Formula: Chemical Formula:

Cu2HgSe2

Help on Composition: Composition:

Molecular Weight = 485.60 gm

Copper 26.17 % Cu

Mercury 41.31 % Hg

Selenium 32.52 % Se

______

100.00 %

Help on Empirical Formula: Empirical Formula:

Cu2HgSe2

Help on Environment: Environment:

Telethermal selenide vein-type assemblage. Possibly related to Ag2HgS2 (Imiterite)

Help on IMA Status: IMA Status:

Approved IMA 2002 (Dana # Added)

Help on Locality: Locality:

Tuminico, Bajo Jug�e, Sierra de Cacho, Sierra de Umango, La Rioja, Argentina. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for Milka Kronegold de Brodtkorb (1932-), Professor at the University of Buenos Aries and La Plata, Argentina

Help on Synonym: Synonym:

IMA1999-023

Brodtkorbite Image

Click Here for Larger Brodtkorbite Image in a New Browser Window Images:

Click Here for Larger Brodtkorbite Image Brodtkorbite Comments: Polished section with partially crossed polarizers showing brodtkorbite (br) in association with tiemannite (ti) and berzelianite (bz). (CanMin, v40:225). Location: Telethermal selenide vein-type assemblage at the Tuminico Ia selenium deposit, Sierra de Cacho (Sierra de Umango) district, La Rioja, Argentina.Scale: Picture Size 0.5 x 0.35 mm. © Canadian Mineralogist

Brodtkorbite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =1.7936:1:1.733

Help on Cell Dimensions: Cell Dimensions:

a = 7.492, b = 4.177, c = 7.239, Z = 2; beta = 114.2° V = 206.63 Den(Calc)= 7.80

Help on Crystal System: Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/n

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 2.73(1)(112), 2.223(0.7)(211), 3.991(0.7)(101),2.072(0.5)(113,312), 3.414(0.5)(200), 3.534(0.5)(011), 3.576(0.5)(110),

Physical Properties of Brodtkorbite

Help on Cleavage: Cleavage:

None

Help on Color: Color:

Dark gray.

Help on Diaphaneity: Diaphaneity:

Opaque

Help on Fracture: Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Help on Habit: Habit:

Aggregates - Made of numerous individual crystals or clusters.

Help on Habit: Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Help on Hardness: Hardness:

2.5-3 - Finger Nail-Calcite

Help on Luster: Luster:

Metallic

Help on Streak: Streak:

dark gray

Optical Properties of Brodtkorbite

Help on RL Anisotrophism: RL Anisotrophism:

Weak to strong.

Help on RL Bireflectance: RL Bireflectance:

Strong.

Help on RL Color: RL Color:

White.

Help on RL Pleochroism: RL Pleochroism:

Weak to moderate.

Help on Reflectivity Reflectivity

Standardized Intensity (100%) Reflection Spectra of Brodtkorbite in Air

λ R1 R 2 ∑ R1(λ) ∑ R2(λ)
470 nm 29.60 37.10
546 nm 27.40 35.10
589 nm 26.60 34.60
650 nm 26.10 34.10

Standardized Intensity (100%) Reflection Spectra of Brodtkorbite in Oil

λ R1 R 2 ∑ R1(λ) ∑ R2(λ)
470 nm 15.15 22.00
546 nm 13.30 20.15
589 nm 12.70 19.80
650 nm 12.30 19.25

Calculated Relative Intensity Colors of Brodtkorbite in Air

RelativeIntensity 0% 40% 80% 100% 120% 160% 200% 240% 280% 320% 330%
R1
R2

Calculated Relative Intensity Colors of Brodtkorbite in Oil

RelativeIntensity 0% 70% 100% 140% 210% 280% 350% 420% 490% 560% 630% 700%
R1
R2

Calculated Properties of Brodtkorbite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=6.62 gm/cc
note: Specific Gravity of Brodtkorbite =7.80 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.14
Boson Index = 0.86

Help on Photoelectric: Photoelectric:

PEBrodtkorbite = 728.96 barns/electron
U=PEBrodtkorbite x rElectron Density=4,824.10 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Brodtkorbite is Not Radioactive

Brodtkorbite Classification

Help on Dana Class: Dana Class:

02.05.08.02 (02)Sulfides - Including Selenides and Tellurides

(02.05)where Am Bn Xp, with (m+n):p=3:2

(02.05.08)Dana Group

02.05.08.01 Imiterite Ag2HgS2 P 21/c 2/m

02.05.08.02 Brodtkorbite! Cu2HgSe2 P 21/n 2/m

Help on Strunz Class: Strunz Class:

02.BD.55 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.B - Metal Sulfides, M:S > 1:1 (mainly 2:1)

02.BD -With Hg, Tl

02.BD.55 Brodtkorbite! Cu2HgSe2 P 21/n 2/m

Other Brodtkorbite Information

Help on References: References:

NAME( MinRec, vol 34, p 203) PHYS. PROP.(MinRec, vol 34, p 203) OPTIC PROP.(MinRec, vol 34, p 203)

Help on See Also: See Also:

Links to other databases for Brodtkorbite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Ask about Brodtkorbite here :
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Print or Cut-and-Paste your Brodtkorbite Specimen Label here :

Brodtkorbite

Cu2HgSe2
Dana No: 02.05.08.02 Strunz No: 02.BD.55
Locality:

Notes: