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- Hilgardite abstract "Hilgardite is a borate mineral with the chemical formula Ca2B5O9Cl·H2O. It is transparent and has vitreous luster. It is colorless to light pink with a white streak. It is rated 5 on the Mohs Scale. It crystallizes in the triclinic crystal system. Crystals occur as distorted tabular triangles and are hemimorphic, polytypes exist.It was named for geologist Eugene W. Hilgard (1833–1916). It was first described in 1937 for an occurrence in the Choctaw Salt Dome of Iberville Parish, Louisiana, USA. It occurs as an uncommon accessory mineral in evaporite deposits and salt domes worldwide. In addition to the type locality it has been reported in Wayne County, Mississippi and in the Louann Salt Formation, Clarke County, Alabama in the United States and at the Penobsquis and Salt Springs evaporites, near Sussex, New Brunswick, Canada. In Europe it is reported from the Konigshall-Hindenburg potash mine near Göttingen, Lower Saxony, Germany and in the Boulby potash mine, Whitby, Yorkshire, England. In Asia it is reported from the Chelkar salt dome, Uralsk district, Kazakhstan; the Ilga Basin, eastern Siberia, Russia and the Sedom Formation, Mount Sedom, Dead Sea, Israel.".
- Hilgardite thumbnail Hilgardite-Boracite-180073.jpg?width=300.
- Hilgardite wikiPageID "3510088".
- Hilgardite wikiPageRevisionID "585859492".
- Hilgardite 2v "Measured: 35°".
- Hilgardite birefringence "δ = 0.034".
- Hilgardite caption "Microcrystalline red-orange hilgardite encasing white boracite, from Boulby Mine, Loftus, North Yorkshire, England. Size: 5.5 x 4.5 x 3.4 cm.".
- Hilgardite category Borate_minerals.
- Hilgardite cleavage "{010}, perfect; {100}, good".
- Hilgardite color "Colorless, light pink to reddish brown".
- Hilgardite diaphaneity "Transparent to translucent".
- Hilgardite formula "Ca2B5O9Cl·H2O".
- Hilgardite fracture "Conchoidal".
- Hilgardite gravity "2.67".
- Hilgardite habit "Tabular triangular crystals".
- Hilgardite hasPhotoCollection Hilgardite.
- Hilgardite luster "Vitreous".
- Hilgardite mohs "5".
- Hilgardite name "Hilgardite".
- Hilgardite opticalprop "Biaxial".
- Hilgardite other "Piezoelectric".
- Hilgardite refractive "nα = 1.630 nβ = 1.636 nγ = 1.664".
- Hilgardite streak "White".
- Hilgardite strunz "6".
- Hilgardite symmetry "Trickinic 1 pedial".
- Hilgardite system Triclinic_crystal_system.
- Hilgardite unitCell "a = 6.297 Å, b = 6.464 Å, c = 6.565 Å; α = 74.24°, β = 61.68°, γ = 61.26°; Z = 1".
- Hilgardite subject Category:Calcium_minerals.
- Hilgardite subject Category:Halide_minerals.
- Hilgardite subject Category:Tektoborates.
- Hilgardite subject Category:Triclinic_minerals.
- Hilgardite type Abstraction100002137.
- Hilgardite type CalciumMinerals.
- Hilgardite type HalideMinerals.
- Hilgardite type Material114580897.
- Hilgardite type Matter100020827.
- Hilgardite type Mineral114662574.
- Hilgardite type Part113809207.
- Hilgardite type PhysicalEntity100001930.
- Hilgardite type Relation100031921.
- Hilgardite type Substance100019613.
- Hilgardite type TriclinicMinerals.
- Hilgardite type ChemicalSubstance.
- Hilgardite type Mineral.
- Hilgardite type ChemicalObject.
- Hilgardite type Thing.
- Hilgardite comment "Hilgardite is a borate mineral with the chemical formula Ca2B5O9Cl·H2O. It is transparent and has vitreous luster. It is colorless to light pink with a white streak. It is rated 5 on the Mohs Scale. It crystallizes in the triclinic crystal system. Crystals occur as distorted tabular triangles and are hemimorphic, polytypes exist.It was named for geologist Eugene W. Hilgard (1833–1916).".
- Hilgardite label "Hilgardita".
- Hilgardite label "Hilgardite".
- Hilgardite label "Hilgardite".
- Hilgardite sameAs Hilgardita.
- Hilgardite sameAs Hilgardite.
- Hilgardite sameAs m.09hg52.
- Hilgardite sameAs Q3785626.
- Hilgardite sameAs Q3785626.
- Hilgardite sameAs Hilgardite.
- Hilgardite wasDerivedFrom Hilgardite?oldid=585859492.
- Hilgardite depiction Hilgardite-Boracite-180073.jpg.
- Hilgardite isPrimaryTopicOf Hilgardite.
- Hilgardite name "Hilgardite".
