Black to brown, chocolate-brown, reddish brown, amber-orange, red-orange
Crystal habit
Typically octahedra, disseminated granular, massive
Twinning
111 rare
Cleavage
111 indistinct, may be a parting.
Fracture
Subconchoidal to uneven, splintery
Tenacity
Brittle
Mohs scale hardness
5.0–5.5
Luster
Vitreous to resinous
Streak
White
Diaphaneity
Subtranslucent to opaque
Specific gravity
4.45 to 4.90
Optical properties
Isotropic, weak anomalous anisotropism
Refractive index
n = 1.9–2.2
Other characteristics
Radioactive, often metamict
References
[2][3][4][5]
Pyrochlore (Na,Ca)2Nb2O6(OH,F) is a mineral group of the niobium end member of the pyrochlore supergroup. Pyrochlore is also a term for the crystal structure Fd3m. The name is from the Greek πῦρ, fire, and χλωρός, green because it typically turns green on ignition in classic blowpipe analysis.[4]
Pyrochlore (Na,Ca)2Nb2O6(OH,F) is a mineral group of the niobium end member of the pyrochlore supergroup. Pyrochlore is also a term for the crystal structure...
hypoallergenic alternative to nickel. Niobium is often found in the minerals pyrochlore and columbite, hence the former name "columbium". Its name comes from...
(alias sheet silicates) and clays; pyrochlore (invalid mineral name since 2010), pyrochlore group and pyrochlore supergroup; antimony and stibnite (alias...
connection between the problem of the frustrated Ising antiferromagnet on a (pyrochlore) lattice of corner-shared tetrahedra and Pauling's water ice problem,...
Betafite is a mineral group in the pyrochlore supergroup, with the chemical formula (Ca,U)2(Ti,Nb,Ta)2O6(OH). Betafite typically occurs as a primary mineral...
north of Rutshuru town, exploiting one of the world's biggest reserves of pyrochlore, an ore of niobium. It is said to be the most valuable mineral resource...
prevailing over titanium and niobium. The microlite group belongs to a large pyrochlore supergroup that occurs in pegmatites and constitutes an ore of tantalum...
The Panda Hill Carbonatite is an apatite and pyrochlore bearing sovite carbonatite located in the Mbeya District of Tanzania. The deposit was found in...
silicate minerals (such as micas and olivine), apatite, magnetite, and pyrochlore. This may not reflect the original composition of the lava, which may...
geochemist at the Australian National University. The Synroc contains pyrochlore and cryptomelane type minerals. The original form of Synroc (Synroc C)...
with random occupancy. Lead antimonate, Pb2Sb2O7, Naples yellow, has the pyrochlore structure. Calcium antimonate, Ca2Sb2O7, has the weberite structure. Ferric...
Republic of the Congo. The site is one of the most economically significant pyrochlore deposits in the world. The rare niobium mineral lueshite [fr] was discovered...
zircon, monazite, gadolinite, fergusonite, uraninite, yttrialite and pyrochlore. Thorite is currently an important ore of uranium. A variety of thorite...
silicate minerals (such as micas and olivine), apatite, magnetite, and pyrochlore. This may not reflect the original composition of the lava, which may...
than 80% of the worldwide niobium production. The niobium is mined from pyrochlore deposits and is subsequently transformed into the niobium pentoxide Nb2O5...
compounds. In 1982 Mas completed his Ph.D. in solid state chemistry on pyrochlore oxides at the Indian Institute of Technology, Madras, India, under the...
'powder', alluding to its composition and habit. It is a member of the pyrochlore super group. It was first described in 1862 for an occurrence in the Brandholz...
Tomasz; Winiarski, Michał J. (2023-07-27). "Superconductivity in Bismuth Pyrochlore Lattice Compounds RbBi2 and CsBi2 : The Role of Relativistic Effects"...
spin ices. A common spin ice structure is shown in Figure 6 in the cubic pyrochlore structure with one magnetic atom or ion residing on each of the four corners...
an effective mass. They may be formed through spin flips in frustrated pyrochlore ferromagnets and interact through a Coulomb potential. Skyrmions and Hopfions...
Global Information
Radioactive, often metamict