A chemical formula (also called molecular formula) is a concise way of expressing information about the atoms that constitute a particular chemical compound. ... Molar mass is the mass of one mole of an element or chemical compound. ... CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences and alloys. ... Density (symbol: ρ - Greek: rho) is a measure of mass per unit of volume. ... A solvent is a liquid that dissolves a solid, liquid, or gaseous solute, resulting in a solution. ... This article describes water from a scientific and technical perspective. ... The melting point of a solid is the temperature at which it changes state from solid to liquid. ... Alternate use: Boiling point Boiling Point, known in Japan as 3-4X Jūgatsu (３－４Ｘ１０月 lit. ...

Properties

Neodymium(III) chloride hexahydrate under fluorescent light

Neodymium(III) chloride hexahydrate in fume cupboard light

Neodymium(III) chloride hexahydrate in sunlight

Neodymium(III) chloride, also known as neodymium trichloride, is a compound of neodymium and chlorine. The anhydrous compound is a mauve-coloured hygroscopic solid that rapidly absorbs water on exposure to moist air to form a violet-coloured hexahydrate, NdCl₃.6H₂O (CAS number 13477-89-9, density 2.282 g cm^-3). This hydrate, like many neodymium salts, has the interesting property that it loses its colour under fluorescent light (see picture). It is soluble in water to the extent of 0.967 kg/L at 13°C ^[2], and (when anhydrous) it is soluble (0.445 kg/L) in ethanol but insoluble in chloroform and ether^[2]. The anhydrous salt is nine-coordinate (trigonal prismatic)^[3], and crystallises with the UCl₃ structure^[1]. Neodymium chloride hexahydrate (fluorescent lighting) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Neodymium chloride hexahydrate (fluorescent lighting) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Neodymium chloride hexahydrate (fume cupboard light) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Neodymium chloride hexahydrate (fume cupboard light) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Neodymium chloride hexahydrate (daylight) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Neodymium chloride hexahydrate (daylight) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... General Name, Symbol, Number Neodymium, Nd, 60 Chemical series Lanthanides Group, Period, Block _ , 6, f Density, Hardness 6800 kg/m3, no data Appearance silvery white, yellowish tinge Atomic properties Atomic weight 144. ... General Name, Symbol, Number chlorine, Cl, 17 Series halogens Group, Period, Block 17 (VIIA), 3, p Density, Hardness 3. ... Liquids and solids (powders) are anhydrous if they are without water, i. ... A hygroscopic or hydroscopic substance is a substance that absorbs water readily from its surroundings. ... Hydrates are compounds formed by the union of water with some other substance, generally forming a neutral body, as certain crystallized salts. ... CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences, mixtures and alloys. ... Density (symbol: ρ - Greek: rho) is a measure of mass per unit of volume. ... General Name, Symbol, Number Neodymium, Nd, 60 Chemical series Lanthanides Group, Period, Block _ , 6, f Density, Hardness 6800 kg/m3, no data Appearance silvery white, yellowish tinge Atomic properties Atomic weight 144. ... In chemistry, salt is a general term used for ionic compounds composed of positively charged cations and negatively charged anions, so that the product is neutral and without a net charge. ... A falling water droplet Water (from the Anglo-Saxon and Low German wæter) is a colourless, tasteless, and odourless substance that is essential to all known forms of life and is the most universal solvent. ... Ethyl alcohol, also known as ethanol or grain alcohol, is a flammable, colorless chemical compound, one of the alcohols that is most often found in alcoholic beverages. ... Chloroform (also known as trichloromethane and methyl trichloride) is a chemical compound with formula CHCl3. ... Ether is the general name for a class of chemical compounds which contain an ether group — an oxygen atom connected to two (substituted) alkyl groups. ... In chemistry, salt is a general term used for ionic compounds composed of positively charged cations and negatively charged anions, so that the product is neutral and without a net charge. ...

Preparation of anhydrous NdCl₃

Simple rapid heating of the hydrate alone may cause small amounts of hydrolysis ^[1], although the method given for drying cerium(III) chloride heptahydrate would be expected to work also for NdCl₃. Anhydrous NdCl₃ can also be made by dehydration of the hydrate either by slowly heating to 400 °C with 4-6 equivalents of ammonium chloride under high vacuum^[1],[4], or by heating with an excess of thionyl chloride for four hours^[1],[5]. The anhydrous halide may alternatively be prepared from neodymium metal and hydrogen chloride ^[6]. It is usually purified by high temperature sublimation under high vacuum. ^[1] Hydrates are compounds formed by the union of water with some other substance, generally forming a neutral body, as certain crystallized salts. ... Hydrolysis is a chemical process in which a molecule is cleaved into two parts by the addition of a molecule of water. ... Cerium(III) chloride (CeCl3), also known as cerous chloride or cerium trichloride, is a compound of cerium and chlorine. ... Liquids and solids (powders) are anhydrous if they are without water, i. ... Ammonium chloride or Sal Ammoniac (chemically ammonium chloride (NH4Cl); also zalmiak, sal armagnac, sal armoniac, and salt armoniack) is, in its pure form, a clear white water-soluble crystalline salt with a biting taste. ... Thionyl chloride (or thionyl dichloride) is an inorganic compound with the formula S O Cl2. ... Liquids and solids (powders) are anhydrous if they are without water, i. ... A halide is a binary compound, of which one part is a halogen atom and the other part is an element or radical that is less electronegative than the halogen, to make a fluoride, chloride, bromide, iodide, or astatide compound. ... General Name, Symbol, Number Neodymium, Nd, 60 Chemical series Lanthanides Group, Period, Block _ , 6, f Density, Hardness 6800 kg/m3, no data Appearance silvery white, yellowish tinge Atomic properties Atomic weight 144. ... Hydrogen chloride, also known under the name HCl, is a highly corrosive and toxic colorless gas that forms white fumes on contact with humidity. ...

Uses

There are no major uses for neodymium(III) chloride, though it can be used as a starting point for the preparation of other neodymium salts. One commercial supplier of the material to schools recommends NdCl₃ as "Great solution for teaching absorption spectroscopy. Violet color provides a good line spectrum." General Name, Symbol, Number Neodymium, Nd, 60 Chemical series Lanthanides Group, Period, Block _ , 6, f Density, Hardness 6800 kg/m3, no data Appearance silvery white, yellowish tinge Atomic properties Atomic weight 144. ... In chemistry, salt is a general term used for ionic compounds composed of positively charged cations and negatively charged anions, so that the product is neutral and without a net charge. ...

Suppliers

• Alfa (http://www.alfa.com/alf/index.htm)
• GFS (http://www.gfschemicals.com/productcatalog/Rare_Earth_Compounds_KO.asp)
• Aldrich (http://www.sigmaaldrich.com)
• Strem (http://www.strem.com/code/index.ghc)
• Flinn (http://www.flinnsci.com)]

In the US, several of these suppliers also distribute through Fisher (https://www1.fishersci.com/index.jsp) VWR (http://www.vwr.com/index.htm)

References

1. F. T. Edelmann, P. Poremba, in: Synthetic Methods of Organometallic and Inorganic Chemistry, (W. A. Herrmann, ed.), Vol. 6, Georg Thieme Verlag, Stuttgart, 1997.
2. CRC Handbook of Chemistry and Physics (58th edition), CRC Press, West Palm Beach, Florida, 1977.
3. N. N. Greenwood, A. Earnshaw, Chemistry of the Elements, Pergamon Press, 1984.
4. M. D. Taylor, P. C. Carter, J. Inorg. Nucl. Chem. 24, 387 (1962); J. Kutscher, A. Schneider, Inorg. Nucl. Chem. Lett. 7, 815 (1971).
5. J. H. Freeman, M. L. Smith, J. Inorg. Nucl. Chem. 7, 224 (1958).
6. L. F. Druding, J. D. Corbett, J. Am. Chem. Soc. 83, 2462 (1961); J. D. Corbett, Rev. Chim. Minerale 10, 239 (1973).