pyrochlore
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Pyrochlore () is a mineral group of the niobium end member of the pyrochlore supergroup. Pyrochlore is also a term for the crystal structure Fdm. The name is from the Greek , fire, and , green because it typically turns green on ignition in classic blowpipe analysis.
Key facts
- Mineral.name
- Pyrochlore
- Mineral.category
- Oxide mineral
- Mineral.image
- Pyrochlore-180063.jpg
- Mineral.caption
- Pyrochlore from Russia
- Mineral.IMAsymbol
- Pcl
- Mineral.strunz
- 4.DH.15
- Mineral.dana
- 08.02.01.01 Pyrochlore group
- Mineral.system
- Isometric
- Mineral.class
- Hexoctahedral (mm) H-M symbol: (4/m 2/m)
- Mineral.symmetry
- Fdm (No. 227)
- Mineral.unit cell
- a = 10.41(6) Å, Z = 8
- Mineral.color
- Black to brown, chocolate-brown, reddish brown, amber-orange, red-orange
- Mineral.habit
- Typically octahedra, disseminated granular, massive
- Mineral.twinning
- 111 rare
- Mineral.cleavage
- 111 indistinct, may be a parting.
- Mineral.fracture
- Subconchoidal to uneven, splintery
- Mineral.tenacity
- Brittle
- Mineral.mohs
- 5.0–5.5
via Wikipedia infobox
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Encyclopedic overview
6 sectionsContents
- Mineral
- History
- Niobium mining
- Crystal structure
- See also
- References
Pyrochlore () is a mineral group of the niobium end member of the pyrochlore supergroup. Pyrochlore is also a term for the crystal structure Fdm. The name is from the Greek , fire, and , green because it typically turns green on ignition in classic blowpipe analysis.
== Mineral == The general formula, (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 immobilization, high-temperature thermal barrier coatings, automobile exhaust gas control, catalysts, solid oxide fuel cell, ionic/electrical conductors etc.
Excerpted from Wikipedia’s “pyrochlore” article, available under the CC BY-SA 4.0 licence.