About: Wadsleyite

An Entity of Type: mineral, from Named Graph: http://dbpedia.org, within Data Space: dbpedia.org

Wadsleyite is an orthorhombic mineral with the formula β-(Mg,Fe)2SiO4. It was first found in nature in the Peace River meteorite from Alberta, Canada. It is formed by a phase transformation from olivine (α-(Mg,Fe)2SiO4) under increasing pressure and eventually transforms into spinel-structured ringwoodite (γ-(Mg,Fe)2SiO4) as pressure increases further. The structure can take up a limited amount of other bivalent cations instead of magnesium, but contrary to the α and γ structures, a β structure with the sum formula Fe2SiO4 is not thermodynamically stable. Its cell parameters are approximately a = 5.7 Å, b = 11.71 Å and c = 8.24 Å.

Property Value
dbo:abstract
  • La wadsleyita és un mineral de la classe dels silicats. Rep el seu nom en honor de David Arthur Wadsley (1918-1969), químic i cristal·lògraf australià, per les seves contribucions significatives a la cristal·lografia, incloent el concepte de cisallament cristal·logràfic. (ca)
  • Wadsleyit ist ein Mineral aus der Abteilung der Gruppensilikate innerhalb der Mineralklasse der „Silikate und Germanate“ mit der idealisierten chemischen Zusammensetzung Mg2[SiO4] und ist damit chemisch gesehen ein Magnesium-Silikat. Wadsleyit kristallisiert im orthorhombischen Kristallsystem, entwickelt aber nur mikrokristalline Aggregate mit Korngrößen bis maximal 5 µm. Bei Wasseraufnahme von mehr als 1,5 % ändert Wadsleyit sein Kristallsystem und wird monoklin. In reiner Form ist Wadsleyit annähernd farblos und durchsichtig. Bei natürlich vorkommenden Wadsleyiten kann allerdings bis zu 30 % der Mg2+-Ionen durch Fe2+-Ionen ersetzt (substituiert) sein, wodurch das Mineral eine dunkelgrüne Farbe annimmt. (de)
  • Wadsleyita silikato motako minerala da. (eu)
  • La wadsleyita es un mineral de la clase de los silicatos, y dentro de esta pertenece a los sorosilicatos, grupo del olivino. Fue descubierta en 1982 analizando el meteorito "Peace River" que en 1963 explotó sobre el cielo de Alberta (Canadá), siendo nombrada así en honor de David A. Wadsley, químico cristalógrafo australiano.​ Un sinónimo es su clave: IMA1982-012. (es)
  • La wadsleyite est un minéral de la famille des silicates (sous-famille des sorosilicates), de formule chimique (Mg,FeII)2SiO4. Son nom est un hommage au minéralogiste australien Arthur David Wadsley (1918-1969). La wadsleyite est un polymorphe de haute pression de l'olivine. À plus haute pression elle est remplacée par la ringwoodite. La wadsleyite a été trouvée dans certaines météorites, où elle a été formée lors d'un choc (à l'arrivée sur Terre ou antérieurement). Les études de pétrologie expérimentale et la sismologie indiquent que la wadsleyite est l'un des minéraux importants du manteau terrestre, présent dans la partie supérieure de la (en). (fr)
  • Wadsleyite is an orthorhombic mineral with the formula β-(Mg,Fe)2SiO4. It was first found in nature in the Peace River meteorite from Alberta, Canada. It is formed by a phase transformation from olivine (α-(Mg,Fe)2SiO4) under increasing pressure and eventually transforms into spinel-structured ringwoodite (γ-(Mg,Fe)2SiO4) as pressure increases further. The structure can take up a limited amount of other bivalent cations instead of magnesium, but contrary to the α and γ structures, a β structure with the sum formula Fe2SiO4 is not thermodynamically stable. Its cell parameters are approximately a = 5.7 Å, b = 11.71 Å and c = 8.24 Å. Wadsleyite is found to be stable in the upper part of the Transition Zone of the Earth's mantle between 410–520 kilometres (250–320 mi) in depth. Because of oxygen atoms not bound to silicon in the Si2O7 groups of wadsleyite, it leaves some oxygen atoms insufficiently bonded. Thus, these oxygens are hydrated easily, allowing for high concentrations of hydrogen atoms in the mineral. Hydrous wadsleyite is considered a potential site for water storage in the Earth's mantle due to the low electrostatic potential of the under bonded oxygen atoms. Although wadsleyite does not contain H in its chemical formula, it may contain more than 3 percent by weight H2O, and may coexist with a hydrous melt at transition zone pressure-temperature conditions. The solubility of water and the density of wadsleyite depend on the temperature and pressure in the Earth. Even though their maximum water storage capabilities might be reduced to about 0.5-1 wt% along the normal geotherm, the Transition Zone which holds up to 60 vol% wadsleyite could still be a major water reservoir in the Earth's interior. Furthermore, the transformation resulting in wadsleyite is thought to occur also in the shock event when a meteorite impacts the Earth or another planet at very high velocity. Wadsleyite was first identified by Ringwood and Major in 1966 and was confirmed to be a stable phase by Akimoto and Sato in 1968. The phase was originally known as β-Mg2SiO4 or "beta-phase". Wadsleyite was named for mineralogist Arthur David Wadsley (1918–1969). (en)
  • La wadsleyite è un minerale scoperto nel 1966 il cui nome è stato attribuito in onore del cristallografo A. D. Wadsley (1918-1969). Questo minerale fa parte del gruppo dell'olivina. È polimorfo della ringwoodite e della forsterite. (it)
  • Вадслеит или Уэдслиит (англ. wadsleyite) — высокобарная полиморфная модификация оливина. Является минералом ромбической сингонии. Впервые был обнаружен в хондрите Peace River в Канаде. (ru)
dbo:thumbnail
dbo:wikiPageID
  • 8949274 (xsd:integer)
dbo:wikiPageLength
  • 15413 (xsd:nonNegativeInteger)
dbo:wikiPageRevisionID
  • 1119697658 (xsd:integer)
dbo:wikiPageWikiLink
dbp:category
dbp:class
dbp:color
  • Dark green (en)
dbp:diaphaneity
  • Transparent (en)
dbp:formula
  • Mg2SiO4 (en)
dbp:gravity
  • 3.840000 (xsd:double)
dbp:habit
  • Microcrystalline aggregates (en)
dbp:imasymbol
  • Wds (en)
dbp:name
  • Wadsleyite (en)
dbp:opticalprop
  • Biaxial (en)
dbp:refractive
  • n = 1.76 (en)
dbp:strunz
  • 9 (xsd:integer)
dbp:symmetry
  • Imma (en)
dbp:system
dbp:unitCell
  • a = 5.7 Å, b = 11.71 Å (en)
  • c = 8.24 Å; Z = 8 (en)
dbp:wikiPageUsesTemplate
gold:hypernym
rdf:type
rdfs:comment
  • La wadsleyita és un mineral de la classe dels silicats. Rep el seu nom en honor de David Arthur Wadsley (1918-1969), químic i cristal·lògraf australià, per les seves contribucions significatives a la cristal·lografia, incloent el concepte de cisallament cristal·logràfic. (ca)
  • Wadsleyita silikato motako minerala da. (eu)
  • La wadsleyita es un mineral de la clase de los silicatos, y dentro de esta pertenece a los sorosilicatos, grupo del olivino. Fue descubierta en 1982 analizando el meteorito "Peace River" que en 1963 explotó sobre el cielo de Alberta (Canadá), siendo nombrada así en honor de David A. Wadsley, químico cristalógrafo australiano.​ Un sinónimo es su clave: IMA1982-012. (es)
  • La wadsleyite è un minerale scoperto nel 1966 il cui nome è stato attribuito in onore del cristallografo A. D. Wadsley (1918-1969). Questo minerale fa parte del gruppo dell'olivina. È polimorfo della ringwoodite e della forsterite. (it)
  • Вадслеит или Уэдслиит (англ. wadsleyite) — высокобарная полиморфная модификация оливина. Является минералом ромбической сингонии. Впервые был обнаружен в хондрите Peace River в Канаде. (ru)
  • Wadsleyit ist ein Mineral aus der Abteilung der Gruppensilikate innerhalb der Mineralklasse der „Silikate und Germanate“ mit der idealisierten chemischen Zusammensetzung Mg2[SiO4] und ist damit chemisch gesehen ein Magnesium-Silikat. Wadsleyit kristallisiert im orthorhombischen Kristallsystem, entwickelt aber nur mikrokristalline Aggregate mit Korngrößen bis maximal 5 µm. Bei Wasseraufnahme von mehr als 1,5 % ändert Wadsleyit sein Kristallsystem und wird monoklin. (de)
  • La wadsleyite est un minéral de la famille des silicates (sous-famille des sorosilicates), de formule chimique (Mg,FeII)2SiO4. Son nom est un hommage au minéralogiste australien Arthur David Wadsley (1918-1969). La wadsleyite est un polymorphe de haute pression de l'olivine. À plus haute pression elle est remplacée par la ringwoodite. La wadsleyite a été trouvée dans certaines météorites, où elle a été formée lors d'un choc (à l'arrivée sur Terre ou antérieurement). (fr)
  • Wadsleyite is an orthorhombic mineral with the formula β-(Mg,Fe)2SiO4. It was first found in nature in the Peace River meteorite from Alberta, Canada. It is formed by a phase transformation from olivine (α-(Mg,Fe)2SiO4) under increasing pressure and eventually transforms into spinel-structured ringwoodite (γ-(Mg,Fe)2SiO4) as pressure increases further. The structure can take up a limited amount of other bivalent cations instead of magnesium, but contrary to the α and γ structures, a β structure with the sum formula Fe2SiO4 is not thermodynamically stable. Its cell parameters are approximately a = 5.7 Å, b = 11.71 Å and c = 8.24 Å. (en)
rdfs:label
  • Wadsleyita (ca)
  • Wadsleyit (de)
  • Wadsleyita (es)
  • Wadsleyita (eu)
  • Wadsleyite (fr)
  • Wadsleyite (it)
  • Вадслеит (ru)
  • Wadsleyite (en)
  • Ведсліїт (uk)
owl:sameAs
prov:wasDerivedFrom
foaf:depiction
foaf:isPrimaryTopicOf
foaf:name
  • Wadsleyite (en)
is dbo:wikiPageWikiLink of
is rdfs:seeAlso of
is foaf:primaryTopic of
Powered by OpenLink Virtuoso    This material is Open Knowledge     W3C Semantic Web Technology     This material is Open Knowledge    Valid XHTML + RDFa
This content was extracted from Wikipedia and is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License