Pyrochlore (
Na,
Ca)
2Nb2O6(
OH,
F) is a
niobate of
calcium,
cerium, and other
bases, occurring usually in
octahedrons of a yellowish or brownish color and
resinous luster. So called from its becoming grass-green on being subjected to heat under the
blowpipe[?].
See also: List of minerals