Selenojalpaite Mineral Data (original) (raw)

General Selenojalpaite Information

Help on Chemical Formula: Chemical Formula:

Ag3CuSe2

Help on Composition: Composition:

Molecular Weight = 544.63 gm

Copper 11.78 % Cu

Silver 59.22 % Ag

Selenium 29.00 % Se

______

100.00 %

Help on Empirical Formula: Empirical Formula:

Ag2.99Cu1.01Se2

Help on Environment: Environment:

Selenojalpaite is typically intergrown with eucairite and berzelianite to form aggregates up to several hundred micrometers across in a hydrothermal calcite vein.

Help on IMA Status: IMA Status:

Approved IMA 2004 (Dana # Added)

Help on Locality: Locality:

Skrikerum Cu-Ag-Tl selenide deposit, Sm�land, southeastern Sweden. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named as the Se analogue of jalpaite.

Help on Synonym: Synonym:

IMA2004-048

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Selenojalpaite Crystallography

Help on Axial Ratios: Axial Ratios:

a:c = 1:1.32498

Help on Cell Dimensions: Cell Dimensions:

a = 8.939, c = 11.844, Z = 8; V = 946.40 Den(Calc)= 7.64

Help on Crystal System: Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: I 41/amd

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 2.426(1)(321), 2.891(0.85)(301), 2.813(0.8)(213),2.473(0.75)(204), 2.162(0.7)(224), 2.034(0.65)(215), 4.47(0.6)(200), 2.552(0.5)(312), 2.292(0.45)(105),

Physical Properties of Selenojalpaite

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:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Help on Hardness: Hardness:

4-4.5 - Between Fluorite and Apatite

Help on Luster: Luster:

Metallic

Help on Streak: Streak:

black

Optical Properties of Selenojalpaite

Help on RL Anisotrophism: RL Anisotrophism:

Yes with no internal reflections.

Help on RL Bireflectance: RL Bireflectance:

Weakly to moderately.

Help on RL Color: RL Color:

Light gray.

Help on RL Pleochroism: RL Pleochroism:

Weak, brownish gray to greenish gray.

Help on Reflectivity Reflectivity

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

λ R1 R 2 ∑ R1(λ) ∑ R2(λ)
470 nm 33.50 37.10
550 nm 31.80 35.10
587 nm 30.40 34.00
650 nm 29.30 32.40

Calculated Relative Intensity Colors of Selenojalpaite in Air

RelativeIntensity 0% 30% 60% 90% 100% 120% 150% 180% 210% 240% 270% 290%
R1
R2

Calculated Properties of Selenojalpaite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=6.67 gm/cc
note: Specific Gravity of Selenojalpaite =7.64 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Help on Photoelectric: Photoelectric:

PESelenojalpaite = 183.50 barns/electron
U=PESelenojalpaite x rElectron Density=1,224.37 barns/cc.

Help on Radioactivity: Radioactivity:

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

Selenojalpaite Classification

Help on Dana Class: Dana Class:

02.04.04.02 (02)Sulfides - Including Selenides and Tellurides

(02.04)where Am Bn Xp, with (m+n):p=2:1

(02.04.04)Dana Group

02.04.04.01 Jalpaite Ag3CuS2 I 41/amd 4/m 2/m 2/m

02.04.04.02 Selenojalpaite! Ag3CuSe2 I 41/amd 4/m 2/m 2/m

Help on Strunz Class: Strunz Class:

02.BA.25c 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

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

02.BA -With Cu, Ag, Au

02.BA.25c Jalpaite Ag3CuS2 I 41/amd 4/m 2/m 2/m

02.BA.25c Selenojalpaite! Ag3CuSe2 I 41/amd 4/m 2/m 2/m

Other Selenojalpaite Information

Help on References: References:

NAME( AmMin, v91, p713) PHYS. PROP.(AmMin, v91, p713) OPTIC PROP.(AmMin, v91, p713)

Help on See Also: See Also:

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

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Print or Cut-and-Paste your Selenojalpaite Specimen Label here :

Selenojalpaite

Ag3CuSe2
Dana No: 02.04.04.02 Strunz No: 02.BA.25c
Locality:

Notes: