RE: A Few More Uses for RubidiumFrom the only Rb producer in north america
Lepidolite
Approximately 100 tonnes per year of lepidolite have been mined, hand-picked,
crushed, and sold for its rubidium content in the past. Tanco was the world's only
significant supplier of rubidium-rich lepidolite. The specifications were
Rb20 3.0% typical
size -12 mm crushed
The only processor of lepidolite for the production of rubidium is in the United States, and
Tanco used to supply all its needs. The material was sold in bulk, crushed to -12 rnm in
size.
Rubidium has properties similar to those of cesium, for which it can be substituted.
However, being rarer and more expensive, cesium is generally preferred, and the market
for rubidium remains small.
The lepidolite bodies of zone (9) will be exploited as sources of tantalum mineral
concentrates.
check pages 37 47 48 an 51fer rubidium
https://www.gov.mb.ca/stem/mrd/info/libmin/gacmac/guidebook_a3.pdf