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- Quintinite abstract "Quintinite is a carbonate mineral with the chemical formula Mg4Al2(OH)12CO3⋅H2O.The mineral was named after Quinitin Wight of Ottawa, Ontario, Canada (b. 1935), who was a significant contributor to mineral studies at Mont Saint-Hilaire.Quintinite is found as 2H and 3T, or 2-hexagonal and 3-trigonal, polytypes, which were originally approved as separate species, but have not been considered species since 1998. These hexagonal and trigonal forms of quinitinite are both from the hexagonal crystal systems, meaning they both have similar lengths of their crystal axes and the same angles between these axes. As a hexagonal mineral, quintinite has three axes of equal length at 60 degree angles to one another and a c axis perpendicular to these three axes of a different length. 2H occurs in carbonatite at Jacupiranga, São Paulo, Brazil, in the Jacupiranga mine and 3T occurs with minerals like gonnardite and donnayite. Both polytypes occur in hydrothermal vents in alkaline rocks. Herg (1977) interpreted the Jacupiranga area as related to a hotspot. The 3T polytype was originally found in the Poudrette quarry at Mont Saint-Hilaire, which is a rare alkaline intrusive complex. The 2H polytype is pleochroic, meaning that the mineral changes colors (in this case yellow and light yellow) when viewed at different angles under a polarizing petrographic microscope. The 3T polytype, however, is not commonly pleochroic but can show green pleochroism if it is high in iron. The 3T polytype has a positive index of refraction whereas the 2H polytype can possess crystals with either a positive or a negative index of refraction.".
- Quintinite thumbnail Quintinite-2H-201249.jpg?width=300.
- Quintinite wikiPageID "28848982".
- Quintinite wikiPageRevisionID "546005851".
- Quintinite caption "Quintinite-2H".
- Quintinite category Carbonate_minerals.
- Quintinite cleavage "{0001} perfect".
- Quintinite color "Colorless, deep orange red, orange, pale brown".
- Quintinite diaphaneity "Transparent".
- Quintinite formula "Mg4Al212CO3·H2O".
- Quintinite gravity "2.14".
- Quintinite habit "Prismatic – crystals shaped like slender prisms".
- Quintinite hasPhotoCollection Quintinite.
- Quintinite luster "Vitreous".
- Quintinite mohs "2".
- Quintinite name "Quintinite".
- Quintinite opticalprop "Uniaxial for 2H type, uniaxial negative, for 3T polytype, uniaxial negative or positive".
- Quintinite pleochroism "For 2H polytype, O=yellow, E=lighter yellow; For 3T polytype, typically nonpleochroic".
- Quintinite refractive "1.533".
- Quintinite streak "White".
- Quintinite strunz "5".
- Quintinite symmetry Hermann%E2%80%93Mauguin_notation.
- Quintinite symmetry "Hexagonal trapezohedral".
- Quintinite symmetry "Space group: P 6322".
- Quintinite system Hexagonal_crystal_system.
- Quintinite unitCell "a = 10.571 Å, c = 15.171 Å, Z = 4".
- Quintinite subject Category:Aluminium_minerals.
- Quintinite subject Category:Carbonate_minerals.
- Quintinite subject Category:Magnesium_minerals.
- Quintinite type Abstraction100002137.
- Quintinite type AluminiumMinerals.
- Quintinite type CarbonateMinerals.
- Quintinite type MagnesiumMinerals.
- Quintinite type Material114580897.
- Quintinite type Matter100020827.
- Quintinite type Mineral114662574.
- Quintinite type Part113809207.
- Quintinite type PhysicalEntity100001930.
- Quintinite type Relation100031921.
- Quintinite type Substance100019613.
- Quintinite type ChemicalSubstance.
- Quintinite type Mineral.
- Quintinite type ChemicalObject.
- Quintinite type Thing.
- Quintinite comment "Quintinite is a carbonate mineral with the chemical formula Mg4Al2(OH)12CO3⋅H2O.The mineral was named after Quinitin Wight of Ottawa, Ontario, Canada (b. 1935), who was a significant contributor to mineral studies at Mont Saint-Hilaire.Quintinite is found as 2H and 3T, or 2-hexagonal and 3-trigonal, polytypes, which were originally approved as separate species, but have not been considered species since 1998.".
- Quintinite label "Quintinit".
- Quintinite label "Quintinita".
- Quintinite label "Quintinite".
- Quintinite label "Quintinite".
- Quintinite label "Quintinite".
- Quintinite sameAs Quintinit.
- Quintinite sameAs Quintinita.
- Quintinite sameAs Quintinite.
- Quintinite sameAs Quintinite.
- Quintinite sameAs m.0ddbyz3.
- Quintinite sameAs Q3927919.
- Quintinite sameAs Q3927919.
- Quintinite sameAs Quintinite.
- Quintinite wasDerivedFrom Quintinite?oldid=546005851.
- Quintinite depiction Quintinite-2H-201249.jpg.
- Quintinite isPrimaryTopicOf Quintinite.
- Quintinite name "Quintinite".
