Certified Reference Material: Tungsten Ore
Printable version of the certificate (PDF, 328.65 kb)
BH-1 is a sample of wolframite ore, hand-picked in 1973 from a stockpile at the Burnt Hill deposit near Fredericton, New Brunswick, the deposit being owned by International Paper Company Limited. Minerals present in decreasing order of abundance are: quartz, biotite, chlorite, muscovite, feldspar, pyrrhotite, beryl and topaz, wolframite, cassiterite and rutile, pyrite, molybdenite, bismuth, bismuthinite and galena, and chalcopyrite.
Certified Value and 95% Confidence Interval
Tungsten 0.422 ± 0.008 wt %
A certificate of analysis will be issued with each order of BH-1. A copy of CANMET Report 76-5, "Tungsten ores CT-1, BH-1 and TLG-1: Their characterization and preparation for use as certified reference materials", will be forwarded, free of charge, on request to the Coordinator, CCRMP.
For further information
555 Booth Street
Ottawa, ON K1A 0G1
E-mail: Contact CCRMP
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