Matches in DBpedia 2014 for { <http://dbpedia.org/resource/Melilite> ?p ?o. }
Showing items 1 to 73 of
73
with 100 items per page.
- Melilite abstract "Melilite refers to a mineral of the melilite group. Minerals of the group are solid solutions of several endmembers, the most important of which are gehlenite and åkermanite. A generalized formula for common melilite is (Ca,Na)2(Al,Mg,Fe2+)[(Al,Si)SiO7]. Discovered in 1793 near Rome, it has a yellowish, greenish brown color. The name derives from the Greek words meli (μέλι) "honey" and lithos (λίθους) "stone". Minerals of the melilite group are sorosilicates. They have the same basic structure, of general formula A2B(T2O7). The melilite structure consist of pairs of fused TO4, where T may be Si, Al, B, in bow-tie form. Sharing one corner, the formula of the pair is T2O7. These bow-ties are linked together into sheets by the B cations. The sheets are held together by the A cations, most commonly calcium and sodium. Aluminium may sit on either the T or the B site. Minerals with the melilite structure may show a cleavage parallel to the (001) crystallographic directions and may show weaker cleavage perpendicular to this, in the {110} directions. Melilite is tetragonal.The important endmembers of common melilite are åkermanite Ca2Mg(Si2O7) and gehlenite Ca2Al[AlSiO7]. Many melilites also contain appreciable iron and sodium.Some other compositions with the melilite structure include: alumoåkermanite (Ca,Na)2(Al,Mg,Fe2+)(Si2O7), okayamalite Ca2B[BSiO7], gugiaite Ca2Be[Si2O7],hardystonite Ca2Zn[Si2O7], barylite BaBe2[Si2O7], andremeyerite BaFe2+2[Si2O7]. Some structures formed by replacing one oxygen by F or OH: leucophanite (Ca,Na)2(Be,Al)[Si2O6(F,OH)], jeffreyite (Ca,Na)2(Be,Al)[Si2O6(O,OH)], and meliphanite (Ca,Na)2(Be,Al)[Si2O6(OH,F)]New members of this mineral group were artifically grown and became intensively studied due to their multiferroic property, i. e. they simultaneously show ferroelectric and magnetic ordering at low temperatures. This gives rise to peculiar optical properties, for example Ba2Co(Ge2O7) shows giant directional dichroism (different absorption for counter-propagating light beams) and hosts magnetically switchable chirality.".
- Melilite thumbnail Orthit_12.jpg?width=300.
- Melilite wikiPageExternalLink optical-properties-of-multiferroic-materials.
- Melilite wikiPageExternalLink Al26clock.html.
- Melilite wikiPageID "3223721".
- Melilite wikiPageRevisionID "602183342".
- Melilite birefringence "δ = 0.006 - 0.011".
- Melilite caption "Orthite and melilite with quartz, from a thin section in crossed polarized light.".
- Melilite category "Sorosilicates".
- Melilite cleavage "Distinct on {001}, weak on {110}".
- Melilite color "Yellowish, greenish brown".
- Melilite diaphaneity "Translucent".
- Melilite formula "2".
- Melilite fracture "Uneven".
- Melilite gravity "2.9".
- Melilite habit "Massive - granular".
- Melilite hasPhotoCollection Melilite.
- Melilite luster "Vitreous - greasy".
- Melilite mohs "5".
- Melilite name "Melilite".
- Melilite opticalprop "Uniaxial".
- Melilite refractive "nω = 1.632 - 1.669 nε = 1.626 - 1.658".
- Melilite streak "white".
- Melilite strunz "9".
- Melilite system Tetragonal_crystal_system.
- Melilite subject Category:Aluminium_minerals.
- Melilite subject Category:Calcium_minerals.
- Melilite subject Category:Iron_minerals.
- Melilite subject Category:Magnesium_minerals.
- Melilite subject Category:Sorosilicates.
- Melilite subject Category:Tetragonal_minerals.
- Melilite type Abstraction100002137.
- Melilite type AluminiumMinerals.
- Melilite type CalciumMinerals.
- Melilite type IronMinerals.
- Melilite type MagnesiumMinerals.
- Melilite type Material114580897.
- Melilite type Matter100020827.
- Melilite type Mineral114662574.
- Melilite type Part113809207.
- Melilite type PhysicalEntity100001930.
- Melilite type Relation100031921.
- Melilite type Substance100019613.
- Melilite type TetragonalMinerals.
- Melilite type ChemicalSubstance.
- Melilite type Mineral.
- Melilite type ChemicalObject.
- Melilite type Thing.
- Melilite comment "Melilite refers to a mineral of the melilite group. Minerals of the group are solid solutions of several endmembers, the most important of which are gehlenite and åkermanite. A generalized formula for common melilite is (Ca,Na)2(Al,Mg,Fe2+)[(Al,Si)SiO7]. Discovered in 1793 near Rome, it has a yellowish, greenish brown color. The name derives from the Greek words meli (μέλι) "honey" and lithos (λίθους) "stone". Minerals of the melilite group are sorosilicates.".
- Melilite label "Meliliet".
- Melilite label "Melilit".
- Melilite label "Melilita".
- Melilite label "Melilite".
- Melilite label "Melilite".
- Melilite label "Melilith".
- Melilite label "Mélilite".
- Melilite label "Мелилит".
- Melilite label "黄長石".
- Melilite sameAs Melilith.
- Melilite sameAs Melilita.
- Melilite sameAs Mélilite.
- Melilite sameAs Melilite.
- Melilite sameAs 黄長石.
- Melilite sameAs Meliliet.
- Melilite sameAs Melilit.
- Melilite sameAs m.08_h77.
- Melilite sameAs Q414123.
- Melilite sameAs Q414123.
- Melilite sameAs Melilite.
- Melilite wasDerivedFrom Melilite?oldid=602183342.
- Melilite depiction Orthit_12.jpg.
- Melilite isPrimaryTopicOf Melilite.
- Melilite name "Melilite".