Business Income Tax. For tax years beginning on or after January 1, 2015. corporations â 5.25 percent of net income. trusts and estates â 3.75 percent of net income.
Previously this substance had been known as a rare mineral of tiny colorless crystals, discovered in 1987 and named after the Poudrette family that operated the source quarry at Mont Saint-Hilaire, Quebec. GRANDIDIERITE is a bluish green mineral found primarily in Madagascar.
However, because of their geochemical properties, rare earth elements are typically dispersed and not often found concentrated as rare earth minerals in economically exploitable ore deposits. It was the very scarcity of these minerals (previously called earths) that led to the term rare earth.espite their name, rare earth elements are â with the exception of the radioactive promethium â relatively plentiful in Earth's crust, with cerium being the 25th most abundant element at 68 parts per million, or as abundant as copper.