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• Ulexite abstract "Ulexite (NaCaB5O6(OH)6•5(H2O)) (hydrated sodium calcium borate hydroxide), sometimes known as TV rock, is a mineral occurring in silky white rounded crystalline masses or in parallel fibers. The natural fibers of ulexite conduct light along their long axes, by internal reflection. Ulexite was named for the German chemist Georg Ludwig Ulex (1811–1883) who first discovered it.Ulexite is a structurally complex mineral, with a basic structure containing chains of sodium, water and hydroxide octahedra. The chains are linked together by calcium, water, hydroxide and oxygen polyhedra and massive boron units. The boron units have a formula of B5O6(OH)6 and a charge of −3. They are composed of three borate tetrahedra and two borate triangular groups.Ulexite is found in evaporite deposits and the precipitated ulexite commonly forms a "cotton ball" tuft of acicular crystals. Ulexite is frequently found associated with colemanite, borax, meyerhofferite, hydroboracite, probertite, glauberite, trona, mirabilite, calcite, gypsum and halite. It is found principally in California and Nevada, USA; Tarapacá Region in Chile, and Kazakhstan. Ulexite is also found in a vein-like bedding habit composed of closely packed fibrous crystals.Ulexite is also known as TV rock due to its unusual optical characteristics. The fibers of ulexite act as optical fibers, transmitting light along their lengths by internal reflection. When a piece of ulexite is cut with flat polished faces perpendicular to the orientation of the fibers, a good-quality specimen will display an image of whatever surface is adjacent to its other side (as shown in the photograph).The fiber-optic effect is the result of the polarization of light into slow and fast rays within each fiber, the internal reflection of the slow ray and the refraction of the fast ray into the slow ray of an adjacent fiber. An interesting consequence is the generation of three cones, two of which are polarized, when a laser beam obliquely illuminates the fibers. These cones can be seen when viewing a light source through the mineral.Ulexite decomposes in hot water.".
• Ulexite thumbnail Ulexite-Calcite-40062.jpg?width=300.
• Ulexite wikiPageExternalLink www.fizkapu.hu.
• Ulexite wikiPageExternalLink fizfilm6.html.
• Ulexite wikiPageExternalLink ulexite.htm.
• Ulexite wikiPageExternalLink ulexite.htm.
• Ulexite wikiPageID "151487".
• Ulexite wikiPageLength "17337".
• Ulexite wikiPageOutDegree "52".
• Ulexite wikiPageRevisionID "654169735".
• Ulexite wikiPageWikiLink Borate_minerals.
• Ulexite wikiPageWikiLink Borax.
• Ulexite wikiPageWikiLink Calcite.
• Ulexite wikiPageWikiLink California.
• Ulexite wikiPageWikiLink Category:Calcium_minerals.
• Ulexite wikiPageWikiLink Category:Nesoborates.
• Ulexite wikiPageWikiLink Category:Sodium_minerals.
• Ulexite wikiPageWikiLink Category:Triclinic_minerals.
• Ulexite wikiPageWikiLink Chile.
• Ulexite wikiPageWikiLink Colemanite.
• Ulexite wikiPageWikiLink Dry_lake.
• Ulexite wikiPageWikiLink Evaporite.
• Ulexite wikiPageWikiLink Fiberscope.
• Ulexite wikiPageWikiLink Georg_Ludwig_Ulex.
• Ulexite wikiPageWikiLink Glauberite.
• Ulexite wikiPageWikiLink Gypsum.
• Ulexite wikiPageWikiLink Halite.
• Ulexite wikiPageWikiLink Howlite.
• Ulexite wikiPageWikiLink Hydroboracite.
• Ulexite wikiPageWikiLink Intermontane.
• Ulexite wikiPageWikiLink Intermontane_basin.
• Ulexite wikiPageWikiLink Kazakhstan.
• Ulexite wikiPageWikiLink Kernite.
• Ulexite wikiPageWikiLink List_of_minerals.
• Ulexite wikiPageWikiLink List_of_minerals_named_after_people.
• Ulexite wikiPageWikiLink Lustre_(mineralogy).
• Ulexite wikiPageWikiLink Meyerhofferite.
• Ulexite wikiPageWikiLink Micrometre.
• Ulexite wikiPageWikiLink Mineral.
• Ulexite wikiPageWikiLink Mirabilite.
• Ulexite wikiPageWikiLink Nesoborates.
• Ulexite wikiPageWikiLink Nevada.
• Ulexite wikiPageWikiLink Optical_fiber.
• Ulexite wikiPageWikiLink Polyatomic_ion.
• Ulexite wikiPageWikiLink Polymorphism_(materials_science).
• Ulexite wikiPageWikiLink Probertite.
• Ulexite wikiPageWikiLink Pyroclastic_rock.
• Ulexite wikiPageWikiLink Solid_solution.
• Ulexite wikiPageWikiLink Strata.
• Ulexite wikiPageWikiLink Stratum.
• Ulexite wikiPageWikiLink Tarapacá_Region.
• Ulexite wikiPageWikiLink Television.
• Ulexite wikiPageWikiLink Triclinic.
• Ulexite wikiPageWikiLink Triclinic_crystal_system.
• Ulexite wikiPageWikiLink Trona.
• Ulexite wikiPageWikiLink Μm.
• Ulexite wikiPageWikiLink File:Ulexite-39574.jpg.
• Ulexite wikiPageWikiLinkText "Ulexite".
• Ulexite wikiPageWikiLinkText "ulexite".
• Ulexite 2v "Measured: 73° to 78°".
• Ulexite birefringence "δ = 0.028".
• Ulexite caption "Ulexite from California".
• Ulexite category Borate_minerals.
• Ulexite category Nesoborates.
• Ulexite cleavage "Perfect on {010} good on {10} poor on {110}".
• Ulexite color "Colorless to white".
• Ulexite dana "26.05".
• Ulexite diaphaneity "Transparent to opaque".
• Ulexite fluorescence "May fluoresce yellow, greenish yellow, cream, white under SW and LW UV".
• Ulexite formula "NaCaB5O66•5".
• Ulexite fracture "Uneven".
• Ulexite gravity "1.95".
• Ulexite habit "Acicular to fibrous".
• Ulexite hasPhotoCollection Ulexite.
• Ulexite luster "Vitreous; silky or satiny in fibrous aggregates".
• Ulexite mohs "2.5".
• Ulexite name "Ulexite".
• Ulexite opticalprop "Biaxial".
• Ulexite other "Parallel fibrous masses can act as fiber optical light pipes".
• Ulexite refractive "nα = 1.491 – 1.496".
• Ulexite solubility "Slightly soluble in water".
• Ulexite streak "White".
• Ulexite strunz "6".
• Ulexite symmetry "Triclinic pinacoidal".
• Ulexite system Triclinic.
• Ulexite system Triclinic_crystal_system.
• Ulexite tenacity "Brittle".
• Ulexite twinning "Polysynthetic on {010} and {100}".
• Ulexite unitCell "a = 8.816 Å, b = 12.87Å, c = 6.678 Å; α = 90.25°, β = 109.12°, γ = 105.1°; Z = 2".
• Ulexite wikiPageUsesTemplate Template:Citation_needed.
• Ulexite wikiPageUsesTemplate Template:Commons_category.
• Ulexite wikiPageUsesTemplate Template:Full.
• Ulexite wikiPageUsesTemplate Template:Hu.
• Ulexite wikiPageUsesTemplate Template:Infobox_mineral.
• Ulexite wikiPageUsesTemplate Template:Portal.
• Ulexite wikiPageUsesTemplate Template:Reflist.
• Ulexite subject Category:Calcium_minerals.
• Ulexite subject Category:Nesoborates.
• Ulexite subject Category:Sodium_minerals.
• Ulexite subject Category:Triclinic_minerals.

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