Pyrochlore (Na, Ca)2 Nb 2 O 6(OH, F) is a mineral group of the niobium end member of the pyrochlore supergroup. Pyrochlore is also a term for the crystal structure F d 3 m. The name is …

pyrochlore, a complex oxide mineral [ (Na, Ca) 2 Nb 2 O 6 (OH,F)] composed of niobium, sodium, and calcium that forms brown to black, glassy octahedral crystals and irregular masses.

2008年12月8日 · The pyrochlore supergroup is a group of chemically complex cubic oxides. The classification of the pyrochlore supergroup is based on the ions at the A, B and Y sites. A …

Pyrochlore: Mineral information, data and localities. 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 …

Pyrochlore is defined as an anion-deficient derivative of the fluorite structure type, characterized by a doubled cell parameter 'a' and a change in space group. It consists of cations in eightfold …

2023年8月20日 · In these and most other carbonatite-hosted niobium deposits, pyrochlore is the principal ore mineral. Four major pyrochlore-bearing rock types are observed in the St Honoré …

Optical Properties: Translucent to opaque. Color: Black to brown, chocolate-brown, reddish brown, amber-orange, red-orange. Streak: Brown. Luster: Vitreous to resinous. Optical Class: …

The general formula of the pyrochlore-supergroup minerals is A 2 B 2 X 6 Y. The mineral names are composed of two prefixes and one root name (identical to the name of the group). The first …

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 …

Unveils the potential of pyrochlore-based compounds as promising options for photocatalysis; Discusses the use of complex metal oxides used in biomedical materials and regenerative …