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Laurite Mineral Data
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General Laurite Information
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 Chemical Formula: |
RuS2 |
| Composition: |
Molecular Weight = 165.20 gm |
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Ruthenium 61.18 % Ru |
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Sulfur 38.82 % S |
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______ |
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100.00 % |
| Empirical Formula: |
RuS2 |
| Environment: |
In ultramafic complexes and their derived placer deposits. |
| IMA Status: |
Valid Species (Pre-IMA) 1866 |
| Locality: |
Borneo, Malaysia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Laura R. Joy, wife of Charles A. Joy, American Chemist, Columbia University, New Yourk City, USA. |
| Name Pronunciation: |
Laurite  |
| Synonym: |
ICSD 24186 |
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PDF 19-1107 |
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Laurite Image |
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Images:
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Hollingworthite Laurite
Comments: Gray grain of hollingworthite (in the center of the picture) with very slightly darker gray laurite (at the right margin). Polished section (from microprobe analysis).
Location: Konder Mine, Konder alkaline-ultrabasic massif, Aldan shield, Saha (Sakha) Republic (Yakutia), Eastern-Siberian Region, Russia.
Scale: Picture size 0.1 mm.
© Thomas Witzke / Abraxas-Verlag |
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Images:
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Kashinite Laurite
Comments: Gray kashinite with darker gray laurite. Polished section (from microprobe analysis) in reflected light.
Location: Nizhne-Tagil'skoye (Mednorudyanskoye) Cu Deposit, Nizhnii Tagil, Sverdlovskaya Oblast', Urals Region, Russia.
Scale: Picture size 0.2 mm.
© Thomas Witzke / Abraxas-Verlag |
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Images:
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Laurite Hollingworthite
Comments: Gray laurite with two smaller grains of hollingworthite (left and right from the laurite, very slightly lighter gray). Polished section (from microprobe analysis) in reflected light.
Location: Konder Mine, Konder alkaline-ultrabasic massif, Aldan shield, Saha (Sakha) Republic (Yakutia), Eastern-Siberian Region, Russia.
Scale: Picture size 0.15 mm.
© Thomas Witzke / Abraxas-Verlag |
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Laurite Crystallography
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| Cell Dimensions: |
a = 5.6, Z = 4; V = 175.62 Den(Calc)= 6.25 |
| Crystal System: |
Isometric - Diploidal H-M Symbol (2/m 3) Space Group: P a3 |
| X Ray Diffraction: |
By Intensity(I/Io): 1.695(1), 3.25(0.8), 2.81(0.7), |
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Physical Properties of Laurite
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| Cleavage: |
{111} Perfect |
| Color: |
Black. |
| Density: |
6.99 |
| Diaphaneity: |
Opaque |
| Fracture: |
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. |
| Habit: |
Crystalline - Fine - Occurs as well-formed fine sized crystals. |
| Habit: |
Crystalline - Poor - Occurs primarily as crudely formed crystals. |
| Habit: |
Granular - Generally occurs as anhedral to subhedral crystals in matrix. |
| Hardness: |
7.5 - Garnet |
| Luminescence: |
Non-fluorescent. |
| Luster: |
Metallic |
| Magnetism: |
Nonmagnetic |
| Streak: |
dark gray |
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Optical Properties of Laurite
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| RL Color: |
White to gray, bluish. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Laurite in Air
| λ |
R |
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∑ R(λ) |
| 400 nm |
46.00 |
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| 420 nm |
45.00 |
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| 440 nm |
44.00 |
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| 460 nm |
43.10 |
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| 480 nm |
42.20 |
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| 500 nm |
41.50 |
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| 520 nm |
40.80 |
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| 540 nm |
40.20 |
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| 560 nm |
39.60 |
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| 580 nm |
39.00 |
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| 600 nm |
38.40 |
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| 620 nm |
38.00 |
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| 640 nm |
37.50 |
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| 660 nm |
37.00 |
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| 680 nm |
36.60 |
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| 700 nm |
36.20 |
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Calculated Relative Intensity Colors of Laurite in Air
Relative
Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
210% |
230% |
| R |
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Calculated Properties of Laurite
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| Electron Density: |
Bulk Density (Electron Density)=5.75 gm/cc
note: Specific Gravity of Laurite =6.25 gm/cc.
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| Fermion Index: |
Fermion Index = 0.18
Boson Index = 0.82 |
| Photoelectric: |
PELaurite = 121.68 barns/electron
U=PELaurite x rElectron Density= 699.71 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Laurite is Not Radioactive |
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Laurite Classification
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| Dana Class: |
02.12.01.10 (02)Sulfides - Including Selenides and Tellurides |
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(02.12)where Am Bn Xp, with (m+n):p=1:2 |
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(02.12.01)Pyrite Group (Isometric: Pa3) |
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02.12.01.01 Pyrite FeS2 P a3 2/m 3 |
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02.12.01.02 Vaesite NiS2 P a3 2/m 3 |
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02.12.01.03 Cattierite CoS2 P a3 2/m 3 |
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02.12.01.04 Penroseite (Ni,Co,Cu)Se2 P a3 2/m 3 |
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02.12.01.05 Trogtalite CoSe2 P a3 2/m 3 |
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02.12.01.06 Villamaninite (Cu,Ni,Co,Fe)S2 P a3 2/m 3 |
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02.12.01.07 Fukuchilite Cu3FeS8 P a3 2/m 3 |
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02.12.01.08 Krutaite CuSe2 P a3 2/m 3 |
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02.12.01.09 Hauerite MnS2 P a3 2/m 3 |
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02.12.01.10 Laurite RuS2 P a3 2/m 3 |
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02.12.01.11 Aurostibite AuSb2 P a3 2/m 3 |
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02.12.01.12 Krutovite NiAs2 P a3 2/m 3 |
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02.12.01.13 Sperrylite PtAs2 P a3 2/m 3 |
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02.12.01.14 Geversite Pt(Sb,Bi)2 P a3 2/m 3 |
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02.12.01.15 Insizwaite Pt(Bi,Sb)2 P a3 2/m 3 |
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02.12.01.16 Erlichmanite OsS2 P a3 2/m 3 |
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02.12.01.17 Dzharkenite FeSe2 P a3 2/m 3 |
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02.12.01.18 Gaotaiite Ir3Te8 P a3 2/m 3 |
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02.12.01.19 Mayingite IrBiTe P a3 2/m 3 |
| Strunz Class: |
02.EB.05a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.E - Metal Sulfides, M:S � 1:2 |
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02.EB -M:S = 1:2, with Fe, Co, Ni, PGE, etc. |
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02.EB.05a Aurostibite AuSb2 P a3 2/m 3 |
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02.EB.05a Cattierite CoS2 P a3 2/m 3 |
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02.EB.05a Hauerite MnS2 P a3 2/m 3 |
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02.EB.05a Fukuchilite Cu3FeS8 P a3 2/m 3 |
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02.EB.05a Dzharkenite FeSe2 P a3 2/m 3 |
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02.EB.05a Erlichmanite OsS2 P a3 2/m 3 |
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02.EB.05a Geversite Pt(Sb,Bi)2 P a3 2/m 3 |
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02.EB.05a Gaotaiite Ir3Te8 P a3 2/m 3 |
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02.EB.05a Insizwaite Pt(Bi,Sb)2 P a3 2/m 3 |
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02.EB.05a Laurite RuS2 P a3 2/m 3 |
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02.EB.05a Krutaite CuSe2 P a3 2/m 3 |
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02.EB.05a Pyrite FeS2 P a3 2/m 3 |
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02.EB.05a Penroseite (Ni,Co,Cu)Se2 P a3 2/m 3 |
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02.EB.05a Sperrylite PtAs2 P a3 2/m 3 |
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02.EB.05a Vaesite NiS2 P a3 2/m 3 |
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02.EB.05a Villamaninite (Cu,Ni,Co,Fe)S2 P a3 2/m 3 |
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02.EB.05a Trogtalite CoSe2 P a3 2/m 3 |
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Other Laurite 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 Laurite :
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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Laurite
RuS2
Dana No: 02.12.01.10 Strunz No: 02.EB.05a
Locality:
Notes:
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