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- Astrophyllite abstract "Astrophyllite is a very rare, brown to golden-yellow hydrous potassium iron titanium silicate mineral. Belonging to the astrophyllite group, astrophyllite may be classed either as an inosilicate, phyllosilicate, or an intermediate between the two. It forms an isomorphous series with kupletskite, to which it is visually identical and often intimately associated. Astrophyllite is of interest primarily to scientists and collectors.Heavy, soft and fragile, astrophyllite typically forms as bladed, radiating stellate aggregates. It is this crystal habit that gives astrophyllite its name, from the Greek words astron meaning "star" and phyllon meaning "leaf". Its great submetallic gleam and darkness contrast sharply with the light (felsic) matrix the mineral is regularly found within. Astrophyllite is usually opaque to translucent, but may be transparent in thin specimens.As the crystals themselves possess perfect cleavage, they are typically left in situ, the entire aggregate often cut into slabs and polished. Owing to its limited availability and high cost, astrophyllite is seldom seen in an ornamental capacity. It is sometimes used in jewellery where it is fashioned into cabochons.Found in cavities and fissures in unusual felsic igneous rocks, astrophyllite is associated with feldspar, mica, titanite, zircon, nepheline, and aegirine. Common impurities include magnesium, aluminium, calcium, zirconium, niobium, and tantalum. It was first discovered in 1854 at its type locality; Laven Island, Norway. Kupletskite was not known until 1956, over a hundred years later.Astrophyllite is found in a few scarce, remote localities: Mont-Saint-Hilaire, Quebec, Canada; Pikes Peak, Colorado, USA; Narsarsuk and Kangerdluarsuk, Greenland; Brevig, Norway; and the Kola Peninsula, Russia.".
- Astrophyllite thumbnail Astrophyllite_detail.jpg?width=300.
- Astrophyllite wikiPageID "458946".
- Astrophyllite wikiPageRevisionID "557402360".
- Astrophyllite birefringence "0.05".
- Astrophyllite category Silicate_minerals.
- Astrophyllite category "Astrophyllite group".
- Astrophyllite cleavage "Perfect on [001] imperfect on [100]".
- Astrophyllite color "Golden brown to yellow; rarely greenish".
- Astrophyllite diaphaneity "Translucent to opaque".
- Astrophyllite formula "37".
- Astrophyllite fracture "Uneven".
- Astrophyllite gravity "3.2".
- Astrophyllite habit "Tabular to bladed, radiating, stellate aggregates; lamellar masses".
- Astrophyllite hasPhotoCollection Astrophyllite.
- Astrophyllite luster "Greasy, pearly, sub-metallic".
- Astrophyllite mohs "3".
- Astrophyllite name "Astrophyllite".
- Astrophyllite opticalprop "Biaxial positive".
- Astrophyllite pleochroism "Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow".
- Astrophyllite refractive "nα = 1.680 nβ = 1.700 nγ = 1.730".
- Astrophyllite streak "Yellowish brown or white".
- Astrophyllite strunz "9".
- Astrophyllite system "Triclinic".
- Astrophyllite wordnet_type synset-mineral-noun-1.
- Astrophyllite subject Category:Inosilicates.
- Astrophyllite subject Category:Iron_minerals.
- Astrophyllite subject Category:Triclinic_minerals.
- Astrophyllite type Abstraction100002137.
- Astrophyllite type IronMinerals.
- Astrophyllite type Material114580897.
- Astrophyllite type Matter100020827.
- Astrophyllite type Mineral114662574.
- Astrophyllite type Part113809207.
- Astrophyllite type PhysicalEntity100001930.
- Astrophyllite type Relation100031921.
- Astrophyllite type Substance100019613.
- Astrophyllite type TriclinicMinerals.
- Astrophyllite type ChemicalSubstance.
- Astrophyllite type Mineral.
- Astrophyllite type ChemicalObject.
- Astrophyllite type Thing.
- Astrophyllite comment "Astrophyllite is a very rare, brown to golden-yellow hydrous potassium iron titanium silicate mineral. Belonging to the astrophyllite group, astrophyllite may be classed either as an inosilicate, phyllosilicate, or an intermediate between the two. It forms an isomorphous series with kupletskite, to which it is visually identical and often intimately associated.".
- Astrophyllite label "Astrofillita".
- Astrophyllite label "Astrofillite".
- Astrophyllite label "Astrofylliet".
- Astrophyllite label "Astrofyllit".
- Astrophyllite label "Astrophyllit".
- Astrophyllite label "Astrophyllite".
- Astrophyllite label "Астрофиллит".
- Astrophyllite sameAs Astrophyllit.
- Astrophyllite sameAs Astrofillita.
- Astrophyllite sameAs Astrofillite.
- Astrophyllite sameAs Astrofylliet.
- Astrophyllite sameAs Astrofyllit.
- Astrophyllite sameAs m.02b_vt.
- Astrophyllite sameAs Q1991431.
- Astrophyllite sameAs Q1991431.
- Astrophyllite sameAs Astrophyllite.
- Astrophyllite wasDerivedFrom Astrophyllite?oldid=557402360.
- Astrophyllite depiction Astrophyllite_detail.jpg.
- Astrophyllite isPrimaryTopicOf Astrophyllite.
- Astrophyllite name "Astrophyllite".
