Grandreefite (original) (raw)
La grandreefita és un mineral de la classe dels sulfats. Rep el seu nom de la mina Grand Reef, a l'estat nord-americà d'Arizona, on va ser descoberta.
| Property | Value |
|---|---|
| dbo:abstract | La grandreefita és un mineral de la classe dels sulfats. Rep el seu nom de la mina Grand Reef, a l'estat nord-americà d'Arizona, on va ser descoberta. (ca) Grandreefite is a rare secondary lead sulfate-fluoride mineral with a general chemical formula, Pb2SO4F2. It is named for the location in which it was discovered in 1989, the Grand Reef Mine in Graham County, Arizona. Grandreefite is monoclinic, falling in the 2/m symmetry group. Crystallographically this means, grandreefite has three axes of unequal length, with two angles at 90° to one another and a third, obtuse angle. The 2/m symmetry group indicates a two-fold axis with a perpendicular mirror plane. Grandreefite was originally classified as an orthorhombic mineral but was determined monoclinic instead upon further analysis. Pseudograndreefite, one of three other newly discovered minerals in 1989 at the Grand Reef Mine site, has orthorhombic crystallography. Optically, grandreefite is an anisotropic mineral, meaning the velocity of light varies depending on the direction through which it is passing through the mineral. Its calculated relief, i.e. its relative difference in index of refraction compared to the surrounding medium's index of refraction, is 1.96–1.98; and its birefringence is .025. Grandreefite, while not a valuable mineral in terms of commercial use, is useful in the sense that it is a good indicator of the very specific environment in which it forms and therefore the same conditions required to produce minerals similar to it in structure, composition, etc. For example, its structure is very similar to that of lanthanide oxide sulfates and therefore may be used to help better describe them. The Grand Reef Mine is located near a large granitic intrusion. Grandreefite is usually found in the mine in isolated veins containing hydrothermal copper, silver, and lead minerals hosted in oxidized breccias. (en) Grandreefita sulfato motako minerala da. (eu) La grandreefite è un minerale. (it) |
| dbo:wikiPageID | 28835237 (xsd:integer) |
| dbo:wikiPageLength | 4338 (xsd:nonNegativeInteger) |
| dbo:wikiPageRevisionID | 1071624898 (xsd:integer) |
| dbo:wikiPageWikiLink | dbr:Intrusion dbr:Graham_County,_Arizona dbr:Copper dbr:Silver dbc:Minerals_in_space_group_15 dbc:Lead_minerals dbr:Lanthanide dbr:Fluoride dbr:Breccia dbr:Granite dbr:Redox dbc:Sulfate_minerals dbc:Monoclinic_minerals dbr:Lead dbr:Sulfate_minerals dbr:Monoclinic dbr:Hydrothermal dbr:Mineral dbr:Vein_(geology) dbr:H-M_symbol dbr:Orthorhombic dbr:Lead_sulfate |
| dbp:2v | 23 (xsd:integer) |
| dbp:category | dbr:Sulfate_minerals |
| dbp:class | Prismatic (en) |
| dbp:cleavage | None (en) |
| dbp:color | Colorless (en) |
| dbp:formula | Pb2SO4F2 (en) |
| dbp:fracture | Conchoidal (en) |
| dbp:gravity | 6.960000 (xsd:double) |
| dbp:imasymbol | Grf (en) |
| dbp:luster | Subadamantine (en) |
| dbp:mohs | 2.500000 (xsd:double) |
| dbp:name | Grandreefite (en) |
| dbp:opticalprop | Transparent, Biaxial (en) |
| dbp:other | Decomposes in water (en) |
| dbp:refractive | nα=1.872, nβ=1.873, nγ=1.895 (en) |
| dbp:streak | White (en) |
| dbp:strunz | 7 (xsd:integer) |
| dbp:symmetry | A2/a (en) |
| dbp:system | dbr:Monoclinic |
| dbp:tenacity | Brittle (en) |
| dbp:twinning | Polysynthetic twins visible under cross polarized light (en) |
| dbp:unitCell | Z = 4; V = 523.15 Å3 (en) a = 8.667, b = 4.4419 (en) c= 14.242 [Å]; β = 107.448° (en) |
| dbp:wikiPageUsesTemplate | dbt:No_footnotes dbt:Reflist dbt:Infobox_mineral |
| dcterms:subject | dbc:Minerals_in_space_group_15 dbc:Lead_minerals dbc:Sulfate_minerals dbc:Monoclinic_minerals |
| gold:hypernym | dbr:Mineral |
| rdf:type | owl:Thing dul:ChemicalObject dbo:ChemicalSubstance wikidata:Q7946 dbo:Mineral yago:WikicatLeadMinerals yago:WikicatSulfateMinerals yago:Abstraction100002137 yago:Material114580897 yago:Matter100020827 yago:Mineral114662574 yago:Part113809207 yago:PhysicalEntity100001930 yago:Relation100031921 yago:WikicatHalideMinerals yago:Substance100019613 |
| rdfs:comment | La grandreefita és un mineral de la classe dels sulfats. Rep el seu nom de la mina Grand Reef, a l'estat nord-americà d'Arizona, on va ser descoberta. (ca) Grandreefita sulfato motako minerala da. (eu) La grandreefite è un minerale. (it) Grandreefite is a rare secondary lead sulfate-fluoride mineral with a general chemical formula, Pb2SO4F2. It is named for the location in which it was discovered in 1989, the Grand Reef Mine in Graham County, Arizona. (en) |
| rdfs:label | Grandreefita (ca) Grandreefite (en) Grandreefita (eu) Grandreefite (it) |
| owl:sameAs | freebase:Grandreefite yago-res:Grandreefite wikidata:Grandreefite dbpedia-ca:Grandreefite dbpedia-eu:Grandreefite dbpedia-it:Grandreefite https://global.dbpedia.org/id/3VUwk |
| prov:wasDerivedFrom | wikipedia-en:Grandreefite?oldid=1071624898&ns=0 |
| foaf:isPrimaryTopicOf | wikipedia-en:Grandreefite |
| foaf:name | Grandreefite (en) |
| is dbo:wikiPageWikiLink of | dbr:List_of_mineral_symbols dbr:List_of_minerals dbr:List_of_minerals_recognized_by_the_International_Mineralogical_Association_(G) dbr:Sulfate_fluoride dbr:Sulfate_mineral |
| is foaf:primaryTopic of | wikipedia-en:Grandreefite |