measured	value	unit
[SiO₂]	36.53	%
[Al₂O₃]	32.82	%
[FeO]	8.43	%
[MgO]	5.47	%
[Na₂O]	2.56	%

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
Table 2. B-isotope abundances of Tourmalines 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