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Yarrowite Mineral Data
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General Yarrowite Information
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 Chemical Formula: |
Cu9S8 |
| Composition: |
Molecular Weight = 828.44 gm |
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Copper 69.03 % Cu |
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Sulfur 30.97 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Cu9S8 |
| Environment: |
As weathering-produced lamellar replacements of other copper sulfides in stratabound re-bed copper deposits (Yarrow and Spionkop Creeks, Canada). |
| IMA Status: |
Approved IMA 1980 |
| Locality: |
Yarrow Creek, southwestern Alberta, Canada. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Name Pronunciation: |
Yarrowite + Pronunciation  |
| Synonym: |
IMA1978-022 |
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Yarrowite Image |
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Images:
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Images:
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Yarrowite Crystallography
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| Axial Ratios: |
a:c = 1:17.7 |
| Cell Dimensions: |
a = 3.8, c = 67.26, Z = 3; V = 841.11 Den(Calc)= 4.91 |
| Crystal System: |
Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: P 3m1 ? |
| X Ray Diffraction: |
By Intensity(I/Io): 1.899(1), 3.061(0.55), 2.767(0.35), |
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Physical Properties of Yarrowite
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| Cleavage: |
{0001} Distinct |
| Color: |
Black, Blue. |
| Density: |
4.89 |
| Diaphaneity: |
Opaque |
| Habit: |
Massive - Uniformly indistinguishable crystals forming large masses. |
| Habit: |
Stellate - Occurs as spherical, radial aggregates radiating from a "star" like point. |
| Habit: |
Tarnishes - Freshly fractured surfaces form a surface oxidation film |
| Hardness: |
3.5 - Copper Penny |
| Luster: |
Metallic |
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Optical Properties of Yarrowite
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| RL Anisotrophism: |
Strong, orange-red. |
| RL Color: |
Blue, blue with a slight violet tint in oil. |
| RL Pleochroism: |
Blue to bluish white. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Yarrowite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
19.20 |
32.90 |
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| 420 nm |
18.60 |
32.30 |
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| 440 nm |
17.90 |
31.40 |
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| 460 nm |
16.90 |
30.50 |
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| 480 nm |
15.60 |
29.50 |
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| 500 nm |
14.20 |
28.20 |
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| 520 nm |
12.40 |
27.00 |
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| 540 nm |
10.70 |
25.60 |
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| 560 nm |
9.08 |
24.30 |
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| 580 nm |
7.51 |
23.10 |
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| 600 nm |
6.15 |
22.20 |
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| 620 nm |
5.02 |
22.20 |
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| 640 nm |
4.33 |
23.00 |
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| 660 nm |
4.38 |
23.60 |
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| 680 nm |
5.96 |
23.40 |
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| 700 nm |
9.44 |
23.00 |
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Calculated Relative Intensity Colors of Yarrowite in Air
Relative
Intensity |
0% |
100% |
200% |
300% |
400% |
500% |
600% |
700% |
800% |
900% |
1000% |
| R1 |
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| R2 |
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Calculated Properties of Yarrowite
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| Electron Density: |
Bulk Density (Electron Density)=4.61 gm/cc
note: Specific Gravity of Yarrowite =4.91 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0023223835
Boson Index = 0.9976776165 |
| Photoelectric: |
PEYarrowite = 32.63 barns/electron
U=PEYarrowite x rElectron Density= 150.45 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Yarrowite is Not Radioactive |
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Yarrowite Classification
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| Dana Class: |
02.07.03.01 (02)Sulfides - Including Selenides and Tellurides |
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(02.07)where Am Bn Xp, with (m+n):p=9:8 |
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(02.07.03)Dana Group |
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02.07.03.01 Yarrowite Cu9S8 P 3m1 ? 3m |
| Strunz Class: |
02.CA.05d 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.C - Metal Sulfides, M:S = 1:1 (and similar) |
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02.CA -With Cu |
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02.CA.05d Yarrowite Cu9S8 P 3m1 ? 3m |
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Other Yarrowite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Yarrowite :
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
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Print or Cut-and-Paste your Yarrowite Specimen Label here :
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Yarrowite
Cu9S8
Dana No: 02.07.03.01 Strunz No: 02.CA.05d
Locality:
Notes:
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