What is Misch metal used for?
Misch metal alloyed with iron is the flint (spark-producing agent) in cigarette lighters and similar devices. Misch metal is also used as a deoxidizer in various alloys and to remove oxygen in vacuum tubes. As an alloying agent in magnesium, it contributes to high strength and creep resistance.
What is xenotime used for?
Xenotime is used chiefly as a source of yttrium and heavy lanthanide metals (dysprosium, ytterbium, erbium and gadolinium). Occasionally, gemstones are also cut from the finest xenotime crystals.
What is praseodymium made of?
The high-strength alloy it forms with magnesium is used in aircraft engines. Mischmetal is an alloy containing about 5% praseodymium and is used to make flints for cigarette lighters….
| Discovery date | 1885 |
|---|---|
| Origin of the name | The name is derived from the Greek ‘prasios didymos’ meaning green twin. |
| Allotropes |
What type of mine is used for lanthanum?
Lanthanum mainly is obtained from lanthanum-rich monazite and bastnasite. Other lanthanum-bearing minerals include allanite and cerite. It is mined in the USA, China, Russia, Australia, and India.
What are Misch metals Class 12?
It means an “A mix of metals”. “Mischmetal is an alloy of rare-earth elements. It is also called Cerium mischmetal, or rare-earth mischmetal. A typical composition includes approximately 50% Cerium and 25% Lanthanum, with small amounts of Neodymium and Praseodymium.
Why transition metals are used for making alloys?
Transition metals have very similar atomic sizes. One metal can easily replace the other metal from its lattice to form solid solution (alloy). Transition metals are miscible with one another in the molten state. The molten state solution of two or more transition metals on cooling forms alloy.
What group is ytterbium in?
Lanthanides
Fact box
| Group | Lanthanides | Melting point |
|---|---|---|
| Period | 6 | Boiling point |
| Block | f | Density (g cm−3) |
| Atomic number | 70 | Relative atomic mass |
| State at 20°C | Solid | Key isotopes |
Is xenotime a mineral?
xenotime, widely distributed phosphate mineral, yttrium phosphate (YPO4), though large proportions of erbium commonly replace yttrium), that occurs as brown, glassy crystals, crystal aggregates, or rosettes in igneous rocks and associated pegmatites, in quartzose and micaceous gneiss, and commonly in detrital material.
Why is praseodymium used in magnets?
In combination with neodymium, another rare-earth element, praseodymium is used to create high-power magnets notable for their strength and durability.
What is Protactinium used for?
Because of its scarcity, high radioactivity and high toxicity, there are currently no practical uses for protactinium other than that of basic scientific research, and for this purpose, protactinium is generally extracted from spent nuclear fuel.
Is cerium a metal?
cerium (Ce), chemical element, the most abundant of the rare-earth metals. Commercial-grade cerium is iron-gray in colour, silvery when in a pure form, and about as soft and ductile as tin.
Is bromine a metal?
Properties. Bromine is the third halogen, being a nonmetal in group 17 of the periodic table. Its properties are thus similar to those of fluorine, chlorine, and iodine, and tend to be intermediate between those of the two neighbouring halogens, chlorine, and iodine.
How to manufacture nitric acid?
Nitric acid manufacturing process is started from ammonia and oxygen gas in ostwald process. Potassium nitrate and sulfuric gas can be used to produce nitric gas in laboratory scale. Nitric acid is used to manufacture explosives, some metal nitrates and many more. In this tutorial we discuss following sections of nitric acid.
What are the uses of nitric acid?
Uses of nitric acid 1 To produce TNT, TNG explosives. 2 Important chemical 3 Get dissolved metals 4 to produce fertilizers 5 to produce metal nitrates: AgNO 3: photographic films and paper KNO 3: Gun powder NaNO 3: preservation for meat, manufacture of sausages
How is nitnitric acid produced from platinum gauges?
Nitric acid production by the oxidation of ammonia on platinum gauzes con-stitutes one of the world’s major chemical industries. In this article the author outlines some of the principal features of this process, and describes in some detail the chemical reaction taking place at the platinum surface.
What is nitric acid manufacturing process in Ostwald process?
Nitric acid manufacturing process in ostwald process is started from ammonia and oxygen gas in industrially. Potassium nitrate and sulfuric gas can be used to produce nitric acid in laboratory scale. Nitric acid is used to manufacture explosives, metal nitrates, fertilizers and many more.