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Pyrochlore
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[?].
- Webmineral - Pyrochlore (http://webmineral.com/data/Pyrochlore.shtml)
See also: List of minerals
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