measured	value	unit
[SiO₂]	36.27	%
[TiO₂]	0.65	%
[Al₂O₃]	31.67	%
[FeO]	10.5	%
[MgO]	4.68	%
[CaO]	0.13	%
[Na₂O]	2.03	%

tables:

SA1.Major Element Abundances of Tourmalines (tour-1 - tour-27), determined by FESEM-EDX of Van Kranendonk, Martin J. (2021) Elements for the Origin of Life on Land: A Deep-Time Perspective from the Pilbara Craton of Western Australia, Astrobiology, 21, 39-59. more