997{10.020 Z=2 X-ray Powder Pattern: Rockall Island, Scotland. 3.80 (100), 2.800 (100), 5.85 (35), 3... 100.01 100.45 100.00 26.98 (1{2) Rockall Island, Scotland; by electron microprobe. (3) BaZrSi3 O9...mineral in aegirine-riebeckite granite (Rockall Island, Scotland); in granular celsian-bearing rocks near...apatite, eudialyte, magnetite, pyrochlore, xenotime, barite, titanite (Rockall Island, Scotland); taramellite...Distribution: On Apex Ridge, Rockall Island, in the North Atlantic Ocean, 294 km west of St. Kilda Island, Outer |