General Tiemannite Information
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Chemical Formula: |
HgSe |
Composition: |
Molecular Weight = 279.55 gm |
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Mercury 71.75 % Hg |
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Selenium 28.25 % Se |
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______ |
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100.00 % |
Empirical Formula: |
HgSe |
Environment: |
Found in hydrothermal veins, usually with other selenides and calcite. |
IMA Status: |
Valid Species (Pre-IMA) 1855 |
Locality: |
Marysville, Piute Co., Utah. Link to MinDat.org Location Data. |
Name Origin: |
Named after its discoverer, C. W. F. Tiemann (1848-1899). |
Synonym: |
ICSD 24322 |
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PDF 8-469 |
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Tiemannite Image |
Images:
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Images:
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Tiemannite
Comments: Dull steel-gray, tetragonal crystals of tiemannite to 0.5mm with modifications and striations, slight purple tinge.
Location: Rio Blanco, Pinal De Arvole, Atriagu, Queretare, Mexico.
Scale: Picture size 2 mm.
© Tom Loomis / Dakota Matrix |
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Tiemannite Crystallography
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Cell Dimensions: |
a = 6.084, Z = 4; V = 225.20 Den(Calc)= 8.24 |
Crystal System: |
Isometric - HextetrahedralH-M Symbol (4 3m) Space Group: F43m |
X Ray Diffraction: |
By Intensity(I/Io): 3.51(1), 2.151(0.5), 1.835(0.3), |
Crystal Structure:
Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above
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Earley J W , American Mineralogist , 35 (1950) p.337-364, Description and syntheses of the selenide minerals
View Additional jPOWD Structure files for Tiemannite
[1]
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Physical Properties of Tiemannite
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Cleavage: |
None |
Color: |
Gray, Reddish brown, Black. |
Density: |
8.19 - 8.47, Average = 8.33 |
Diaphaniety: |
Opaque |
Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. |
Habit: |
Euhedral Crystals - Occurs as well-formed crystals showing good external form. |
Habit: |
Massive - Granular - Common texture observed in granite and other igneous rock. |
Hardness: |
2.5 - Finger Nail |
Luminescence: |
None. |
Luster: |
Metallic |
Magnetism: |
Nonmagnetic |
Streak: |
grayish black |
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Optical Properties of Tiemannite
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RL Color: |
Grayish white. |
Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Tiemannite in Air
| λ |
R |
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∑ R(λ) |
| 400 nm |
33.40 |
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| 420 nm |
33.60 |
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| 440 nm |
33.80 |
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| 460 nm |
33.20 |
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| 480 nm |
32.30 |
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| 500 nm |
31.30 |
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| 520 nm |
30.50 |
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| 540 nm |
29.80 |
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| 560 nm |
29.30 |
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| 580 nm |
29.00 |
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| 600 nm |
28.70 |
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| 620 nm |
28.50 |
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| 640 nm |
28.30 |
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| 660 nm |
28.20 |
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| 680 nm |
28.00 |
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| 700 nm |
28.00 |
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Calculated Relative Intensity Colors of Tiemannite in Air
Relative Intensity |
0% |
40% |
80% |
100% |
120% |
160% |
200% |
240% |
280% |
310% |
| R |
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Calculated Properties of Tiemannite
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Electron Density: |
relectron=6.72 gm/cc note: rTiemannite =8.24 gm/cc. |
Fermion Index |
Fermion Index = 0.23816 Boson Index = 0.76184 |
Photoelectric: |
PETiemannite =1,269.54 barns/electron U=PETiemannite x relectron=8,531.97 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Tiemannite is Not Radioactive |
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Tiemannite Classification
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Dana Class: |
2.8.2.4 (2)Sulfides - Including Selenides and Tellurides |
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(2.8)where Am Bn Xp, with (m+n):p=1:1 |
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(2.8.2)Sphalerite Group (Isometric: F4¯3m) |
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2.8.2.1 Sphalerite (Zn,Fe)S F43m 4 3m |
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2.8.2.2 Stilleite ZnSe F43m 4 3m |
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2.8.2.3 Metacinnabar HgS F43m 4 3m |
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2.8.2.4 Tiemannite HgSe F43m 4 3m |
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2.8.2.5 Coloradoite HgTe F43m 4 3m |
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2.8.2.6 Hawleyite CdS F43m 4 3m |
Strunz Class: |
II/C.01-50 II - Sulfides and sulphosalts |
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II/C - Sulfides with metal: sulfur, selenium and tellurium = 1:1 |
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II/C.01 - Sphalerite group and related compounds (with Leutite) |
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II/C.01-10 Sphalerite (Zn,Fe)S F43m 4 3m |
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II/C.01-20 Hawleyite CdS F43m 4 3m |
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II/C.01-30 Metacinnabar HgS F43m 4 3m |
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II/C.01-40 Stilleite ZnSe F43m 4 3m |
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II/C.01-50 Tiemannite HgSe F43m 4 3m |
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II/C.01-60 Coloradoite HgTe F43m 4 3m |
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II/C.01-70 Polhemusite (Zn,Hg)S P 4/n 4/m |
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Other Tiemannite Information
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References: |
NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
See Also: |
Links to other databases for Tiemannite :
1 -Am. Min. Crystal Structure Database
2 -Athena
3 - Crocoite.com Mineral Locations
4 - EUROmin Project
5 -Google Images
6 -Google Scholar
7 -Handbook of Mineralogy (UofA)
8 -MinDAT
9 -MinMax(Deutsch)
10 -MinMax(English)
11 -Mineralienatlas (Deutsch)
12 -QUT Mineral Atlas
13 - WWW-MINCRYST
14 -École des Mines de Paris
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Tiemannite
HgSe
Dana No: 2.8.2.4 Strunz No: II/C.01-50
Locality:
Notes:
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