Abstract:SUMMARY OF COMMUNICATIONS much darker than the cores, variations due to varying Fe and Mg contents.A second generation of light green tourmalines also occurs in quartz veins of Quartzite. These are alkalideficient, Cr-and V-bearing tourmalines with higher Mg# than those of the schorl-dravite series. The occupancy of the X-site, according to X-ray fluorescence data, is δ 0,51 Ca 0.33 Na 0.15 , thus corresponding to foitite, considered as an alkali-deficient schorl.Raman studies also discriminated two groups of … Show more
scite is a Brooklyn-based startup that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.