Data Portal @ linkeddatafragments.org

Matches in DBpedia 2014 for { <http://dbpedia.org/resource/Crocoite> ?p ?o. }

• Crocoite abstract "Crocoite is a mineral consisting of lead chromate, PbCrO4, and crystallizing in the monoclinic crystal system. It is identical in composition with the artificial product chrome yellow used as a paint pigment. It is commonly found as large, well-developed prismatic crystals, although in many cases are poorly terminated. Crystals are of a bright hyacinth-red color, translucent, and have an adamantine to vitreous lustre. On exposure to UV light some of the translucency and brilliancy is lost. The streak is orange-yellow; Mohs hardness is 2.5–3; and the specific gravity is 6.0.It was discovered at the Berezovskoe Au Deposit (Berezovsk Mines) near Ekaterinburg in the Urals in 1766; and named crocoise by F. S. Beudant in 1832, from the Greek κρόκος (krokos), saffron, in allusion to its color, a name first altered to crocoisite and afterwards to crocoite. In the type locality the crystals are found in gold-bearing quartz-veins traversing granite or gneiss and associated with crocoite are quartz, embreyite, phoenicochroite and vauquelinite. Phoenicochroite is a basic lead chromate, Pb2CrO5 with dark red crystals, and vauquelinite a lead and copper phosphate-chromate, Pb2CuCrO4PO4OH, with brown or green monoclinic crystals. Vauquelinite was named after L. N. Vauquelin, who in 1797 discovered (simultaneously with and independently of M. H. Klaproth) the element chromium in crocoite.Abundant masses with exceptional examples of crocoite crystals have been found in the Adelaide, Red Lead, West Comet, Platt and a few other Mines at Dundas, Tasmania; they are usually found in long slender prisms, usually about 10–20 mm but rarely up to 200 mm (4 inches) in length, with a brilliant lustre and color. Crocoite is also the official Tasmanian mineral emblem. Other localities which have yielded good crystallized specimens are Congonhas do Campo near Ouro Preto in Brazil, Luzon in the Philippines, Mutare in Mashonaland, near Menzies in Western Australia, plus Brazil, Germany and South Africa.The relative rarity of crocoite is connected with the specific conditions required for its formation: an oxidation zone of lead ore bed and presence of ultramafic rocks serving as the source of chromium (in chromite). Oxidation of Cr3+ into CrO42- (from chromite) and decomposition of galena (or other primary lead minerals) are required for crocoite formation. These conditions are relatively unusual.As crocoite is composed of lead(II) chromate, it is toxic, containing both lead and hexavalent chromium.".
• Crocoite thumbnail Crocoite_from_the_Dundas_extended_mine,_Dundas,_Tasmania,_Australia.jpg?width=300.
• Crocoite wikiPageExternalLink StateEmblems.htm.
• Crocoite wikiPageID "2351790".
• Crocoite wikiPageRevisionID "600845625".
• Crocoite birefringence "δ = 0.370".
• Crocoite caption "Crocoite from Dundas, Tasmania.".
• Crocoite category "Chromate mineral".
• Crocoite cleavage "Distinct on {110} indistinct on {001} and {100}".
• Crocoite color "Orange, red, yellow".
• Crocoite diaphaneity "Transparent to translucent".
• Crocoite formula "Lead Chromate PbCrO4".
• Crocoite fracture "Conchoidal to uneven".
• Crocoite gravity "5.9".
• Crocoite habit "Coarsely crystalline to acicular".
• Crocoite hasPhotoCollection Crocoite.
• Crocoite luster "Adamantine".
• Crocoite mohs "2.5".
• Crocoite name "Crocoite".
• Crocoite opticalprop "Biaxial".
• Crocoite pleochroism "Weak".
• Crocoite refractive "nα = 2.290 nβ = 2.360 nγ = 2.660".
• Crocoite streak "Yellowish orange".
• Crocoite strunz "7".
• Crocoite symmetry "Monoclinic prismatic".
• Crocoite system Monoclinic_crystal_system.
• Crocoite tenacity "Sectile".
• Crocoite unitCell "a = 7.12 Å, b = 7.421 Å, c = 6.8 Å; β = 102.41°; Z = 4".
• Crocoite subject Category:Chromate_minerals.
• Crocoite subject Category:Lead_minerals.
• Crocoite subject Category:Monoclinic_minerals.
• Crocoite type Abstraction100002137.
• Crocoite type ChromateMinerals.
• Crocoite type LeadMinerals.
• Crocoite type Material114580897.
• Crocoite type Matter100020827.
• Crocoite type Mineral114662574.
• Crocoite type MonoclinicMinerals.
• Crocoite type Part113809207.
• Crocoite type PhysicalEntity100001930.
• Crocoite type Relation100031921.
• Crocoite type Substance100019613.
• Crocoite type ChemicalSubstance.
• Crocoite type Mineral.
• Crocoite type ChemicalObject.
• Crocoite type Thing.
• Crocoite comment "Crocoite is a mineral consisting of lead chromate, PbCrO4, and crystallizing in the monoclinic crystal system. It is identical in composition with the artificial product chrome yellow used as a paint pigment. It is commonly found as large, well-developed prismatic crystals, although in many cases are poorly terminated. Crystals are of a bright hyacinth-red color, translucent, and have an adamantine to vitreous lustre. On exposure to UV light some of the translucency and brilliancy is lost.".
• Crocoite label "Crocoiet".
• Crocoite label "Crocoite".
• Crocoite label "Crocoite".
• Crocoite label "Crocoíta".
• Crocoite label "Crocoíta".
• Crocoite label "Crocoïte".
• Crocoite label "Krokoit".
• Crocoite label "Krokoit".
• Crocoite label "Крокоит".
• Crocoite label "紅鉛鉱".
• Crocoite label "铬铅矿".
• Crocoite sameAs Krokoit.
• Crocoite sameAs Κροκοΐτης.
• Crocoite sameAs Crocoíta.
• Crocoite sameAs Crocoïte.
• Crocoite sameAs Crocoite.
• Crocoite sameAs 紅鉛鉱.
• Crocoite sameAs Crocoiet.
• Crocoite sameAs Krokoit.
• Crocoite sameAs Crocoíta.
• Crocoite sameAs m.075xh2.
• Crocoite sameAs Q422903.
• Crocoite sameAs Q422903.
• Crocoite sameAs Crocoite.
• Crocoite wasDerivedFrom Crocoite?oldid=600845625.
• Crocoite depiction Crocoite_from_the_Dundas_extended_mine,_Dundas,_Tasmania,_Australia.jpg.
• Crocoite isPrimaryTopicOf Crocoite.
• Crocoite name "Crocoite".