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Hexaboride Neodymium

Neodymium hexaboride is a binary inorganic compound of neodymium and boron with the formula NdB 6 , black crystals, does not dissolve in water.

Hexaboride Neodymium
Are common
Systematic
name
Hexaboride Neodymium
Traditional namesBoron neodymium
Chem. formulaNdB 6
Physical properties
conditionblack crystals
Molar mass209.11 g / mol
Density4.93 g / cm³
Thermal properties
T. melt.2610 ° C
Classification
Reg. CAS number12008-23-0
Reg. EINECS number234-532-1

Getting

  • Fusion of stoichiometric amounts of pure substances:
Nd+6B→2600oCNdB6{\ displaystyle {\ mathsf {Nd + 6B \ {\ xrightarrow {2600 ^ {o} C}} \ NdB_ {6}}}}  
  • Sintering of neodymium oxide and boron carbide :
Nd2O3+3BfourC→T2NdB6+3CO↑{\ displaystyle {\ mathsf {{Nd_ {2} O_ {3} + 3B_ {4} C \ {\ xrightarrow {T}} \ 2NdB_ {6} + 3CO \ uparrow}}}  

Physical Properties

Neodymium hexaboride forms black crystals of the cubic system , space group P m3m , cell parameters a = 0.41260 nm, Z = 1.

Not soluble in water.

Literature

  • Chemist Handbook / Redkol .: Nikolsky B.P. et al. - 2nd ed., Rev. - M.-L.: Chemistry, 1966. - T. 1. - 1072 p.
  • CRC Handbook of Chemistry and Physics . - 89th edition. - Taylor and Francis Group, LLC, 2008-2009.
  • State diagrams of double metal systems / Ed. N. P. Lyakishev. - M .: Mashinostroenie, 1996. - T. 1. - 992 p. - ISBN 5-217-02688-X .
  • Chemistry and Technology of Rare and Scattered Elements, Part II / Ed. K.A. Bolshakov. - M .: Higher. School, 1976. - 360 p.


Source - https://ru.wikipedia.org/w/index.php?title= Hexaboride_neodymium&oldid = 80361461


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