Berzelianite Mineral Data (original) (raw)
General Berzelianite Information
Chemical Formula:
Cu2Se
Composition:
Molecular Weight = 206.05 gm
Copper 61.68 % Cu
Selenium 38.32 % Se
______
100.00 %
Empirical Formula:
Cu2Se
Environment:
With other selenides in hydrotherma veinlets in dolomite.
IMA Status:
Valid Species (Pre-IMA) 1850
Locality:
Skrikerum, Kalmar, Sweden. Link to MinDat.org Location Data.
Name Origin:
Named after Jons Jacob Berzelius (1779-1848), Swedish chemist who discovered the element selenium.
Name Pronunciation:
Berzelianite + Pronunciation 
Synonym:
ICSD 238
PDF 6-680
Berzelianite Image
Images:
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Berzelianite Crystallography
Cell Dimensions:
a = 5.739, Z = 4; V = 189.02 Den(Calc)= 7.24
Crystal System:
Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F m3m
X Ray Diffraction:
By Intensity(I/Io): 2.02(1), 3.32(0.9), 1.726(0.8),
Crystal Structure:
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| | Borchert W , Zeitschrift fur Kristallographie , 106 (1945) p.5-24, Gitterumwandlungen im system Cu2-x Se View Additional jPOWD Structure files for Berzelianite [1] [2] [3] [4] | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
Physical Properties of Berzelianite
Cleavage:
None
Color:
Bluish gray, Gray, Black.
Density:
6.7
Diaphaneity:
Opaque
Fracture:
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Habit:
Dendritic - Branching "tree-like" growths of great complexity (e.g. pyrolusite).
Habit:
Disseminated - Occurs in small, distinct particles dispersed in matrix.
Habit:
Massive - Uniformly indistinguishable crystals forming large masses.
Hardness:
2 - Gypsum
Luster:
Metallic
Streak:
shining
Optical Properties of Berzelianite
RL Anisotrophism:
Isotropic, sometimes anisotropic.
Reflectivity
Standardized Intensity (100%) Reflection Spectra of Berzelianite in Air
| λ | R |  |
∑ R(λ) |
|---|---|---|---|
| 400 nm | 25.80 |  |
|
| 420 nm | 27.20 |  |
|
| 440 nm | 28.60 |  |
|
| 460 nm | 29.40 |  |
|
| 480 nm | 29.40 |  |
|
| 500 nm | 28.60 |  |
|
| 520 nm | 27.80 |  |
|
| 540 nm | 25.80 |  |
|
| 560 nm | 24.30 |  |
|
| 580 nm | 22.70 |  |
|
| 600 nm | 21.20 |  |
|
| 620 nm | 20.00 |  |
|
| 640 nm | 19.00 |  |
|
| 660 nm | 18.00 |  |
|
| 680 nm | 17.00 |  |
|
| 700 nm | 16.20 |  |
Calculated Relative Intensity Colors of Berzelianite in Air
| RelativeIntensity | 0% | 50% | 100% | 150% | 200% | 250% | 300% | 350% | 400% | 420% |
|---|---|---|---|---|---|---|---|---|---|---|
| R |
Calculated Properties of Berzelianite
Electron Density:
Bulk Density (Electron Density)=6.47 gm/cc
note: Specific Gravity of Berzelianite =7.24 gm/cc.
Fermion Index:
Fermion Index = 0.02
Boson Index = 0.98
Photoelectric:
PEBerzelianite = 59.11 barns/electron
U=PEBerzelianite x rElectron Density= 382.19 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Berzelianite is Not Radioactive
Berzelianite Classification
Dana Class:
02.04.10.01 (02)Sulfides - Including Selenides and Tellurides
(02.04)where Am Bn Xp, with (m+n):p=2:1
(02.04.10)Dana Group
02.04.10.01 Berzelianite Cu2Se F m3m 4/m 3 2/m
Strunz Class:
02.BA.15a 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.15a Berzelianite Cu2Se F m3m 4/m 3 2/m
Other Berzelianite Information
References:
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
See Also:
Links to other databases for Berzelianite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - Scandinavian mineral gallery
16 - WWW-MINCRYST
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Print or Cut-and-Paste your Berzelianite Specimen Label here :
Berzelianite
Cu2Se
Dana No: 02.04.10.01 Strunz No: 02.BA.15a
Locality:
Notes: