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![Mineralogy Database Mineralogy Database](/images/Hedyphane_Crystal.gif) |
Bornhardtite Mineral Data
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General Bornhardtite Information
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Chemical Formula: |
Co++Co+++2Se4 |
Composition: |
Molecular Weight = 413.68 gm |
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Cobalt 42.74 % Co |
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Selenium 57.26 % Se |
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______ |
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100.00 % |
Empirical Formula: |
CoCo2Se3 |
Environment: |
Of hydrothermal origin. |
IMA Status: |
Valid Species (Pre-IMA) 1955 |
Locality: |
At the Trogtal quarry, near Lautenthal, and at Tilkerode, Harz, Germany. Link to MinDat.org Location Data. |
Name Origin: |
After Dr. Wilhelm Bornhardt (1864-?), German student of ore deposits. |
Name Pronunciation: |
Bornhardtite + Pronunciation |
Synonym: |
ICSD 42538 |
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PDF 15-463 |
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Bornhardtite Crystallography
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Cell Dimensions: |
a = 10.2, Z = 8; V = 1,061.21 Den(Calc)= 5.18 |
Crystal System: |
Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m |
X Ray Diffraction: |
By Intensity(I/Io): 2.3(1), 2.4(1), 2.7(1), |
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Physical Properties of Bornhardtite
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Color: |
Copper, Pink. |
Diaphaneity: |
Opaque |
Hardness: |
4 - Fluorite |
Luster: |
Metallic |
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Optical Properties of Bornhardtite
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Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Bornhardtite in Air
λ |
R |
![](../images/Reflect_scale_v.gif) |
∑ R(λ) |
400 nm |
41.30 |
![](../images/400nm.BMP) |
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420 nm |
42.80 |
![](../images/420nm.BMP) |
440 nm |
44.30 |
![](../images/440nm.BMP) |
460 nm |
45.40 |
![](../images/460nm.BMP) |
480 nm |
46.40 |
![](../images/480nm.BMP) |
500 nm |
47.20 |
![](../images/500nm.BMP) |
520 nm |
47.80 |
![](../images/520nm.BMP) |
540 nm |
48.40 |
![](../images/540nm.BMP) |
560 nm |
49.20 |
![](../images/560nm.BMP) |
580 nm |
49.20 |
![](../images/580nm.BMP) |
600 nm |
49.70 |
![](../images/600nm.BMP) |
620 nm |
50.20 |
![](../images/620nm.BMP) |
640 nm |
50.80 |
![](../images/640nm.BMP) |
660 nm |
51.40 |
![](../images/660nm.BMP) |
680 nm |
52.00 |
![](../images/680nm.BMP) |
700 nm |
52.70 |
![](../images/700nm.BMP) |
Calculated Relative Intensity Colors of Bornhardtite in Air
Relative Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
200% |
R |
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Calculated Properties of Bornhardtite
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Electron Density: |
Bulk Density (Electron Density)=4.58 gm/cc note: Specific Gravity of Bornhardtite =5.18 gm/cc. |
Fermion Index: |
Fermion Index = 0.04 Boson Index = 0.96 |
Photoelectric: |
PEBornhardtite = 61.17 barns/electron U=PEBornhardtite x rElectron Density= 280.35 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Bornhardtite is Not Radioactive |
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Bornhardtite Classification
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Dana Class: |
02.10.01.05 (02)Sulfides - Including Selenides and Tellurides |
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(02.10)where Am Bn Xp, with (m+n):p=3:4 |
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(02.10.01)Linnaeite Group (Isometric: Fd3m) |
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02.10.01.01 Linnaeite CoCo2S4 F d3m 4/m 3 2/m |
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02.10.01.02 Carrollite Cu(Co,Ni)2S4 F d3m 4/m 3 2/m |
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02.10.01.03 Fletcherite Cu(Ni,Co)2S4 F d3m 4/m 3 2/m |
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02.10.01.04 Tyrrellite (Cu,Co,Ni)3Se4 F d3m 4/m 3 2/m |
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02.10.01.05 Bornhardtite CoCo2Se4 F d3m 4/m 3 2/m |
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02.10.01.06 Siegenite (Ni,Co)3S4 F d3m 4/m 3 2/m |
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02.10.01.07 Polydymite NiNi2S4 F d3m 4/m 3 2/m |
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02.10.01.08 Violarite FeNi2S4 F d3m 4/m 3 2/m |
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02.10.01.09 Trustedtite Ni3Se4 F d3m 4/m 3 2/m |
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02.10.01.10 Greigite FeFe2S4 F d3m 4/m 3 2/m |
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02.10.01.11 Daubreelite FeCr2S4 F d3m 4/m 3 2/m |
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02.10.01.12 Indite FeIn2S4 F d3m 4/m 3 2/m |
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02.10.01.13 Kalininite ZnCr2S4 F d3m 4/m 3 2/m |
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02.10.01.14 Florensovite Cu(Cr1.5Sb0.5)S4 F d3m 4/m 3 2/m |
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02.10.01.15 Cuproiridsite CuIr2S4 F d3m 4/m 3 2/m |
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02.10.01.16 Cuprorhodsite CuRh2S4 F d3m 4/m 3 2/m |
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02.10.01.17 Malanite Cu(Pt,Ir)2S4 F d3m 4/m 3 2/m |
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02.10.01.18 Ferrorhodsite (Fe,Cu)(Rh,Ir,Pt)2S4 F d3m 4/m 3 2/m |
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02.10.01.19 Cadmoindite! CdIn2S4 F d3m 4/m 3 2/m |
Strunz Class: |
02.DA.05 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.D - Metal Sulfides, M:S = 3:4 and 2:3 |
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02.DA -M:S = 3:4 |
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02.DA.05 Bornhardtite CoCo2Se4 F d3m 4/m 3 2/m |
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02.DA.05 Florensovite Cu(Cr1.5Sb0.5)S4 F d3m 4/m 3 2/m |
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02.DA.05 Carrollite Cu(Co,Ni)2S4 F d3m 4/m 3 2/m |
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02.DA.05 Fletcherite Cu(Ni,Co)2S4 F d3m 4/m 3 2/m |
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02.DA.05 Cuproiridsite CuIr2S4 F d3m 4/m 3 2/m |
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02.DA.05 Cuprorhodsite CuRh2S4 F d3m 4/m 3 2/m |
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02.DA.05 Dayingite* CuCoPtS4 F m3m 4/m 3 2/m |
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02.DA.05 Daubreelite FeCr2S4 F d3m 4/m 3 2/m |
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02.DA.05 Ferrorhodsite (Fe,Cu)(Rh,Ir,Pt)2S4 F d3m 4/m 3 2/m |
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02.DA.05 Greigite FeFe2S4 F d3m 4/m 3 2/m |
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02.DA.05 Indite FeIn2S4 F d3m 4/m 3 2/m |
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02.DA.05 Linnaeite CoCo2S4 F d3m 4/m 3 2/m |
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02.DA.05 Kalininite ZnCr2S4 F d3m 4/m 3 2/m |
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02.DA.05 Malanite Cu(Pt,Ir)2S4 F d3m 4/m 3 2/m |
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02.DA.05 Polydymite NiNi2S4 F d3m 4/m 3 2/m |
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02.DA.05 Violarite FeNi2S4 F d3m 4/m 3 2/m |
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02.DA.05 Tyrrellite (Cu,Co,Ni)3Se4 F d3m 4/m 3 2/m |
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02.DA.05 Siegenite (Ni,Co)3S4 F d3m 4/m 3 2/m |
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02.DA.05 Xingzhongite (Pb,Cu,Fe)(Ir,Pt,Rh)2S4 F d3m 4/m 3 2/m |
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02.DA.05 Trustedtite Ni3Se4 F d3m 4/m 3 2/m |
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02.DA.05 Cadmoindite! CdIn2S4 F d3m 4/m 3 2/m |
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Other Bornhardtite Information
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References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
See Also: |
Links to other databases for Bornhardtite :
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 - WWW-MINCRYST
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Print or Cut-and-Paste your Bornhardtite Specimen Label here :
Bornhardtite
Co++Co+++2Se4
Dana No: 02.10.01.05 Strunz No: 02.DA.05
Locality:
Notes:
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