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- Boracite abstract "Boracite is a magnesium borate mineral with formula: Mg3B7O13Cl. It occurs as blue green, colorless, gray, yellow to white crystals in the orthorhombic - pyramidal crystal system. Boracite also shows pseudo-isometric cubical and octahedral forms. These are thought to be the result of transition from an unstable high temperature isometric form on cooling. Penetration twins are not unusual. It occurs as well formed crystals and dispersed grains often embedded within gypsum and anhydrite crystals. It has a Mohs hardness of 7 to 7.5 and a specific gravity of 2.9. Refractive index values are nα = 1.658 - 1.662, nβ = 1.662 - 1.667 and nγ = 1.668 - 1.673. It has a conchoidal fracture and does not show cleavage. It is soluble in water.Boracite is typically found in evaporite sequences associated with gypsum, anhydrite, halite, sylvite, carnallite, kainite and hilgardite. It was first described in 1789 for specimens from its type locality of Kalkberg hill, Lüneburg, Lower Saxony, Germany. The name is obviously derived from its boron content (19 to 20% boron by mass).".
- Boracite thumbnail Boracit_mineralogisches_museum_bonn.jpg?width=300.
- Boracite wikiPageID "1179801".
- Boracite wikiPageRevisionID "558081894".
- Boracite 2v "82".
- Boracite birefringence "δ = 0.010–0.011".
- Boracite caption "Boracite, Mineralogisches Museum Bonn".
- Boracite category Borate_minerals.
- Boracite cleavage "None".
- Boracite color "Colorless, white, gray, brown, orange, yellow, pale green, dark green, blue-green, or blue; colorless in transmitted light".
- Boracite dana "25.06".
- Boracite density "2.91".
- Boracite diaphaneity "Subtransparent to translucent".
- Boracite dispersion "0.024".
- Boracite fluorescence "None".
- Boracite formula "Mg3B7O13Cl".
- Boracite fracture "Irregular/uneven, conchoidal".
- Boracite gravity "2.95".
- Boracite habit "Crystalline, disseminated".
- Boracite hasPhotoCollection Boracite.
- Boracite luster Lustre_(mineralogy).
- Boracite mohs "7".
- Boracite molweight "392.03".
- Boracite name "Boracite".
- Boracite opticalprop "Biaxial".
- Boracite pleochroism "None".
- Boracite refractive "nα=1.658 - 1.662,".
- Boracite refractive "nβ=1.662 - 1.667,".
- Boracite refractive "nγ=1.668 - 1.673".
- Boracite solubility "Very slowly soluble in H2O; Slowly but completely soluble in HCl".
- Boracite streak "White".
- Boracite strunz "6".
- Boracite system "Orthorhombic - pyramidal, pseudocubic".
- Boracite tenacity Brittleness.
- Boracite twinning "Rarely as penetration twins".
- Boracite unitCell "a = 8.577 Å, b = 8.553 Å, c = 12.09 Å; Z = 4".
- Boracite subject Category:Cubic_minerals.
- Boracite subject Category:Magnesium_minerals.
- Boracite subject Category:Tektoborates.
- Boracite type Abstraction100002137.
- Boracite type CubicMinerals.
- Boracite type HalideMinerals.
- Boracite type MagnesiumMinerals.
- Boracite type Material114580897.
- Boracite type Matter100020827.
- Boracite type Mineral114662574.
- Boracite type Part113809207.
- Boracite type PhysicalEntity100001930.
- Boracite type Relation100031921.
- Boracite type Substance100019613.
- Boracite type ChemicalSubstance.
- Boracite type Mineral.
- Boracite type ChemicalObject.
- Boracite type Thing.
- Boracite comment "Boracite is a magnesium borate mineral with formula: Mg3B7O13Cl. It occurs as blue green, colorless, gray, yellow to white crystals in the orthorhombic - pyramidal crystal system. Boracite also shows pseudo-isometric cubical and octahedral forms. These are thought to be the result of transition from an unstable high temperature isometric form on cooling. Penetration twins are not unusual. It occurs as well formed crystals and dispersed grains often embedded within gypsum and anhydrite crystals.".
- Boracite label "Boraciet".
- Boracite label "Boracit".
- Boracite label "Boracita".
- Boracite label "Boracite".
- Boracite label "Boracite".
- Boracite label "Boracyt".
- Boracite label "Борацит".
- Boracite sameAs Boracit.
- Boracite sameAs Boracita.
- Boracite sameAs Boracite.
- Boracite sameAs Boraciet.
- Boracite sameAs Boracyt.
- Boracite sameAs m.04dyww.
- Boracite sameAs Q420204.
- Boracite sameAs Q420204.
- Boracite sameAs Boracite.
- Boracite wasDerivedFrom Boracite?oldid=558081894.
- Boracite depiction Boracit_mineralogisches_museum_bonn.jpg.
- Boracite isPrimaryTopicOf Boracite.
- Boracite name "Boracite".