• Pyrochlore - Wikipedia

    en.wikipedia.org/wiki/Pyrochlore Pyrochlore (Na,Ca) 2 Nb 2 O 6 (OH,F) is a mineral group of the niobium end member of the pyrochlore supergroup. The general formula, A 2 B 2 O 7 (where A and B are metals), represent a family of phases isostructural to the mineral pyrochlore. Pyrochlores are an important class of materials in diverse technological applications such as luminescence, ionic conductivity, nuclear waste ...
  • Pyrochlore Mineral Data

    webmineral.com/data/Pyrochlore.shtml Pyrochlore Crystallography: Cell Dimensions: a = 10.37, Z = 10; V = 1,115.16 Den(Calc)= 5.27 : Crystal System: Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3m : X Ray Diffraction:
  • Pyrochlore Group: Mineral information, data and localities.

    www.mindat.org/min-3316.html The pyrochlore group gets its name from the generic name pyrochlore which was first introduced by J. J. Berzelius for a cubic mineral found by N.O. Tank in the 1820s in a syenite pegmatite at Stavern (formerly Fredriksvärn), Norway (Wöhler 1826).
  • Pyrochlore | mineral | Britannica

    www.britannica.com/science/pyrochlore Pyrochlore, a complex oxide mineral [(Na, Ca)2Nb2O6(OH,F)] composed of niobium, sodium, and calcium that forms brown to black, glassy octahedral crystals and irregular masses. Tantalum atoms replace niobium atoms in the chemical structure, so that pyrochlore forms a solid-solution series with the
  • Pyrochlore | Definition of Pyrochlore by Merriam-Webster

    www.merriam-webster.com/dictionary/pyrochlore Pyrochlore definition is - a brown or dark reddish mineral NaCaCb2O6F that is isomorphous with microlite and is an oxide and fluoride of sodium, calcium, and columbium.
  • Pyrochlore | Definition of Pyrochlore at Dictionary.com

    www.dictionary.com/browse/pyrochlore Pyrochlore definition, a mineral, chiefly composed of niobates of the cerium metals, occurring in syenites in the form of brown crystals. See more.
  • Pyrochlore: Mineral information, data and localities.

    www.mindat.org/min-40411.html The name pyrochlore which was first introduced by J.J. Berzelius for a cubic mineral found by N.O. Tank in the 1820s in a syenite pegmatite at Stavern (formerly Fredriksvärn), Norway (Wöhler 1826). It is derived from the Greek πΰρ, fire, and χλωρός, green in allusion to the fact that the mineral usually turns green on ignition.
  • PYROCHLORE (Calcium Sodium Niobium Oxide Hydroxide Fluoride)

    www.galleries.com/Pyrochlore Pyrochlore is the more impure mineral of the two because it is more often accepting of the inclusion of elements such as tantalum, titanium, iron and uranium as well as the previously mentioned rare earth metals into its structure. Some variety names of pyrochlore are known. "Hatchettolite" and "ellsworthite" both contain uranium and come from ...
  • Cava Lab: Pyrochlore

    www.princeton.edu/~cavalab/tutorials/public/structures/pyrochlore.html Pyrochlore Ca 2 Nb 2 O 6 F Ca 2 Nb 2 O 6 F (download cif) is the nominal pyrochlore mineral. The general formula for Pyrochlore is A 2 B 2 O 7, or more accurately: A 2 B 2 O 6 O'. In the case of nominal pyrochlore, F occupies the F' site. Pyrochlore is highly symmetric, and is face-centered.
  • Pyrochlore - an overview | ScienceDirect Topics

    www.sciencedirect.com/topics/physics-and-astronomy/pyrochlore Pyrochlore magnets have been a playground for the physics of geometrical frustration as the A-site of cubic pyrochlores of the form A 2 B 2 O 7 form a network of corner-sharing tetrahedra, shown in Figure 36 [80].The family of rare earth titanates, R 2 B 2 O 7, has been of particular interest, as a range of R 3+ ions can occupy the A-site, and the B-site of the pyrochlore structure is occupied ...