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Lynas Rare Earths, Ltd. is an Australian rare-earths mining company with two major operations: a mining and concentration plant at Mount Weld in Western Australia, and the Lynas Advanced Materials Plant (LAMP) in Kuantan, Malaysia. [1] The company was founded in the 1990s and is headquartered in Perth, Western Australia.
The following list, derived from the statistics of the United Nations' Food and Agriculture Organization (FAO), lists the most valuable agricultural products produced by the countries of the world. [1] The data in this article, unless otherwise noted, was reported for 2016.
The principal sources of rare-earth elements are the minerals bastnäsite (RCO 3 F, where R is a mixture of rare-earth elements), monazite (XPO 4, where X is a mixture of rare-earth elements and sometimes thorium), and loparite ((Ce,Na,Ca)(Ti,Nb)O 3), and the lateritic ion-adsorption clays.
The elements in parentheses are listed in the order of their relative proportion within the mineral: lanthanum is the most common rare-earth element in monazite-(La), and so forth. Silica ( SiO 2 ) is present in trace amounts, as well as small amounts of uranium and thorium .
Has no known biological role, [11] and is extremely rare in the Earth's crust. None known. [11] rhodium: 45: 1: Has no known biological role, [11] and is extremely rare in the Earth's crust. Toxic in some forms. [11] rubidium: 37: 2c: Has no known biological role, although it seems to substitute for potassium, and bioaccumulates in plants.
Plant nutrition is the study of the chemical elements and compounds necessary for plant growth and reproduction, plant metabolism and their external supply. In its absence the plant is unable to complete a normal life cycle, or that the element is part of some essential plant constituent or metabolite .