NJG20-3/4-04
1940
Enrichment of lithium in Norwegian cleavelandite-quartz-pegmatites
20
3, 4
193-198

All the Norwegian cleavelandite-quartz-pegmatites from which suitable material was available are shown to be enriched in lithium. In nearly all of them is found a brownish mica related to zinnwaldite and containing more than 1 %, in extreme cases more than 3 %, Li2O. Other Li-rich minerals (petalite, spodumene, amblygonite &c) have so far not been observed in these deposits.