(Science: chemical) A hydrous phosphate of iron of a blue to green colour, growing darker on exposure. It occurs in monoclinic crystals, also fibrous, massive, and earthy.
Origin: So called by Werner after the English mineralogist F. G. Vivian.
You will also like...
Different mental disorders are described here. Read this tutorial to get an overview of schizophrenia, affective mood di..
Developmental biology is a biological science that is primarily concerned with how a living thing grows and attains matu..
This tutorial looks at the relationship between organisms. It also explores how energy is passed on in the food chain an..
This tutorial deals with the abiotic factors of the freshwater environment that determine what sort of life would be sui..
This lesson explores the impact of biosecurity threats, and why they need to be identified and managed. Examples to incl..