Where does phosphate come from?

1 Answer
Mar 17, 2016

Most phosphate is locked up in crustal rocks as apatite or fluorapatite and similar minerals.

Explanation:

Phosphate is part of the rock cycle and the phosphorus cycle. Like all elements on Earth phosphorus originally came from a nebulae in space and was incorporated into matter as the planets formed.

Since then, phosphorous gets weathered out of rocks and transported via rivers to oceans where it re-precipites out as appetitive or fluorapatite. Some gets incorporated into life along the way. Phosphorous is key element of life in fact and forms part of our DNA genetic material.

![http://sciencelearn.org.nz/Contexts/Soil-Farming-and-Science/Science-Ideas-and-Concepts/The-phosphorus-cycle image source here](useruploads.socratic.org)