Assertion: borax's boron | /r/HasProperty | a trace element
Facets:
value: within the lithosphere
type: LOCATION
Source sentences:
text: Boron is a trace element (atomic number 5) and a fascinating character (because I am a dork and easily fascinated by chemistry).
text: Because boron is a trace element, the majority of borate minerals occur only in one specific geologic environment: geologically active intermontane basins.
text: Boron is a trace element within the lithosphere that has an average concentration of 10 ppm, although large areas of the world are boron deficient.