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- Grandreefite abstract "Grandreefite is a rare secondary lead sulfate-fluoride mineral with a general chemical formula, Pb2SO4F2. It is named for the location in which it was discovered in 1989, the Grand Reef Mine in Graham County, Arizona. Grandreefite is monoclinic, falling in the 2/m symmetry group. Crystallographically this means, grandreefite has three axes of unequal length, with two angles at 90° to one another and a third, obtuse angle. The 2/m symmetry group indicates a two-fold axis with a perpendicular mirror plane. Grandreefite was originally classified as an orthorhombic mineral but was determined monoclinic instead upon further analysis. Pseudograndreefite, one of three other newly discovered minerals in 1989 at the Grand Reef Mine site, has orthorhombic crystallography. Optically, grandreefite is an anisotropic mineral, meaning the velocity of light varies depending on the direction through which it is passing through the mineral. Its calculated relief, i.e. its relative difference in index of refraction compared to the surrounding medium's index of refraction, is 1.96–1.98; and its birefringence is .025. Grandreefite, while not a valuable mineral in terms of commercial use, is useful in the sense that it is a good indicator of the very specific environment in which it forms and therefore the same conditions required to produce minerals similar to it in structure, composition, etc. For example, its structure is very similar to that of lanthanide oxide sulfates and therefore may be used to help better describe them. The Grand Reef Mine is located near a large granitic intrusion. Grandreefite is usually found in the mine in isolated veins containing hydrothermal copper, silver, and lead minerals hosted in oxidized breccias.".
- Grandreefite wikiPageID "28835237".
- Grandreefite wikiPageRevisionID "545999551".
- Grandreefite 2v "23".
- Grandreefite category Sulfate_minerals.
- Grandreefite cleavage "None".
- Grandreefite color "Colorless".
- Grandreefite formula "Pb2SO4F2".
- Grandreefite fracture "Conchoidal".
- Grandreefite gravity "6.96".
- Grandreefite hasPhotoCollection Grandreefite.
- Grandreefite luster "Subadamantine".
- Grandreefite mohsScaleHardness "2.5".
- Grandreefite name "Grandreefite".
- Grandreefite opticalProperties "Transparent".
- Grandreefite opticalprop "Biaxial".
- Grandreefite other "Decomposes in water".
- Grandreefite refractive "nα=1.872, nβ=1.873, nγ=1.895".
- Grandreefite streak "White".
- Grandreefite strunz "7".
- Grandreefite symmetry Hermann%E2%80%93Mauguin_notation.
- Grandreefite symmetry "Monoclinic prismatic".
- Grandreefite symmetry "Space group: A2/a".
- Grandreefite system Monoclinic_crystal_system.
- Grandreefite tenacity "Brittle".
- Grandreefite twinning "Polysynthetic twins visible under cross polarized light".
- Grandreefite unitCell "a=8.667 Å, b=4.4419 Å, c= 14.242 Å, β=107.448, V=523.15 Å3".
- Grandreefite subject Category:Lead_minerals.
- Grandreefite subject Category:Sulfate_minerals.
- Grandreefite type Abstraction100002137.
- Grandreefite type LeadMinerals.
- Grandreefite type Material114580897.
- Grandreefite type Matter100020827.
- Grandreefite type Mineral114662574.
- Grandreefite type Part113809207.
- Grandreefite type PhysicalEntity100001930.
- Grandreefite type Relation100031921.
- Grandreefite type Substance100019613.
- Grandreefite type SulfateMinerals.
- Grandreefite type ChemicalSubstance.
- Grandreefite type Mineral.
- Grandreefite type ChemicalObject.
- Grandreefite type Thing.
- Grandreefite comment "Grandreefite is a rare secondary lead sulfate-fluoride mineral with a general chemical formula, Pb2SO4F2. It is named for the location in which it was discovered in 1989, the Grand Reef Mine in Graham County, Arizona. Grandreefite is monoclinic, falling in the 2/m symmetry group. Crystallographically this means, grandreefite has three axes of unequal length, with two angles at 90° to one another and a third, obtuse angle.".
- Grandreefite label "Grandreefite".
- Grandreefite label "Grandreefite".
- Grandreefite sameAs Grandreefite.
- Grandreefite sameAs m.0dd8zs9.
- Grandreefite sameAs Q3775698.
- Grandreefite sameAs Q3775698.
- Grandreefite sameAs Grandreefite.
- Grandreefite wasDerivedFrom Grandreefite?oldid=545999551.
- Grandreefite isPrimaryTopicOf Grandreefite.
- Grandreefite name "Grandreefite".