出典:Wiktionary
For its composition, a mineral related to lamprophyllite with a dominance of sodium and barium (chemical symbols Na かつ Ba).
nabalamprophyllite (uncountable)
出典:Wikipedia
出典:『Wikipedia』 (2011/04/15 23:52 UTC 版)
Nabalamprophyllite has a general formula of Ba(Na,Ba){Na3Ti[Ti2O2Si4O14](OH,F)2} The name is given for its composition (Naba, meaning sodium, Na and barium, Ba) and relation to other lamprophyllite-group minerals. Lamprophyllite is a rare Ti-bearing silicate mineral usually found in intrusive igneous rocks.