Assertion: phosphate's element | /r/HasProperty | essential
Facets:
value: to a mineral's composition
type: OTHER
Source sentences:
text: Two broad classes of elements (idiochromatic and allochromatic) are defined with regards to their contribution to a mineral's colour: Idiochromatic elements are essential to a mineral's composition; their contribution to a mineral's colour is diagnostic.
text: Rock phosphate, a major source of phosphorus is an essential element for plants and animals nutrition.
text: Rock phosphate, a major source of phosphorus is an essential element for plants and animals nutrition.