Shengyao manufacturer supplies and sells high-purity rare earths

Main elements
According to the atomic electron layer structure and physical and chemical properties of rare earth elements, as well as their occurrence in minerals and the different ionic radii that can produce different properties, seventeen rare earth elements are usually divided into two groups Rare earths and materials
(Zhang)
Light rare earths include lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium and gadolinium.
Heavy rare earths include terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, and scandium.
Cerium group (light rare earths) lanthanum, cerium, praseodymium, neodymium, promethium, samarium and europium
Yttrium group (heavy rare earths) gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium and
br/> Monazite
Monazite is also known as bastnaite
Chemical composition and properties,,)[]. Ingredients vary greatly. The content of rare earth oxides in mineral components can reach ~. Isomorphic mixtures include,,,[] and []. Monazite dissolves in,.
Crystal structure and morphology: monoclinic system, orthorhombic columnar crystal system. The crystals are plate-shaped, often with stripes on the crystal surface, and sometimes in the form of columns, cones, or granules.
The physical properties are yellowish brown, brown, red, and sometimes green. Translucent to transparent. The streaks are white or light reddish yellow. Has strong glass luster. Hardness is brittle. The specific gravity and electromagnetic properties are medium and weak. Glows green under rays. Does not emit light under cathode rays.
The generation state occurs in the rare metals in granite and granitic pegmatite, mixed in the Alpine veins in greisenite and quartzite in spruce syenite, felsite and alkaline syenite pegmatite. In rocks, weathering crust and placer deposits.
Usage: Mainly used to extract rare earth elements.
The main monazite resources with economic mining value in the origin are alluvial or seaside placer deposits. The most important seaside placer deposits are along the coasts of Australia, Brazil and India. In addition, Sri Lanka, Madagascar, South Africa, Malaysia, China, Thailand, South Korea, North Korea and other places all contain heavy sand deposits of monazite.
The production of monazite has been on a downward trend in recent years. The main reason is that the thorium element in the ore is radioactive and harmful to the environment.