Assertion: tourmaline's use | /r/CapableOf | measure major elements
Facets:
value: with similar masses
type: OTHER
Source sentences:
text: Consequently, the use of Si as an internal standard means short- and long-term fractionation is less problematic when measuring major elements with similar masses (Na, Mg, Al, Ca, and Fe) in tourmaline (e.g., Chen, 1999).