| 词条 | Laurite |
| 释义 |
| name = Laurite | image = Kristallstruktur Pyrit.png | alt = | caption = | category = Sulfide mineral | formula = RuS2 | strunz = 2.EB.05a | dana = | system = Cubic | class = Diploidal (m{{overline|3}}) H-M symbol: (2/m {{overline|3}}) | symmetry = Pa{{overline|3}} | unit cell = a = 5.61 Å; Z = 4 | color = Iron-black; white to gray or bluish in polished section | habit = As octahedral, cubic, and pyritohedral crystals or as rounded grains and inclusions | twinning = | cleavage = Perfect on {111} | fracture = Subconchoidal | tenacity = Brittle | mohs = 7.5 | luster = Metallic | streak = Dark gray | diaphaneity = Opaque | gravity = 6.43 | density = | polish = | opticalprop = Isotropic and opaque | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = [1][2][3] }} Laurite is an opaque black, metallic ruthenium sulfide mineral with formula: RuS2. It crystallizes in the isometric system. It is in the pyrite structural group. Though rare, it occurs in many parts of the world. Laurite has a Mohs hardness of 7.5 and a specific gravity of 6.43. It can contain osmium, rhodium, iridium, and iron substituting for the ruthenium.[2] Discovery and occurrenceIt was discovered in 1866 in Borneo, Malaysia and named for Laurie, the wife of Charles A. Joy, an American chemist.[2] It occurs in ultramafic magmatic cumulate deposits and sedimentary placer deposits derived from them. It occurs associated with cooperite, braggite, sperrylite, other minerals of the platinum group elements and chromite.[1] Synthetic RuS2 is a highly active catalyst for hydrodesulfurization.[4] References1. ^1 Laurite in the Handbook of Mineralogy {{sulfide-mineral-stub}}2. ^1 2 Laurite on Mindat.org 3. ^Laurite data on Webmineral 4. ^{{cite journal|authors=Chianelli, R. R.; Berhault, G.; Raybaud, P.; Kasztelan, S.; Hafner, J.; Toulhoat, H.|title=Periodic Trends in Hydrodesulfurization: in Support of the Sabatier Principle|journal= Appl. Catal., A |year=2002|volume=227|pages=83-96|doi=10.1016/S0926-860X(01)00924-3}} 4 : Ruthenium minerals|Pyrite group|Transition metal dichalcogenides|Cubic minerals |
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