Assertion: chrysotile | /r/MadeOf | no iron
Facets:
value: in pure form
type: OTHER
Source sentences:
text: Chrysotile in its pure form contains no iron, which is the reason it appears to be white.
text: Chrysotile and tremolite, which in pure form contain no iron, tend to be white, together with actinolite and anthophyllite are grouped together as "white asbestos" and classified as UN2590 (under the United Nations chemical ID numbering system).