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Molecular formula : HF
MW : 178.49
CAS :
density : 13.31
Melting Point : 2227 ° C
Boiling Point : 4600 ° C
traits : bright silver metal.
purposes : X-ray tubes used for the cathode material, as well as atomic reactor structural material, and for filament insoluble alloy and the manufacturing industry.
preparation or sources : from 4 hafnium with sodium chloride or magnesium reduction by thermal and prepared.
Note : atomic number 72, and the chemical nature of the same zirconium. Valence +2, +3, +4. Oxides dissociation (Do) : 7.9 (eV) elements of ionizing energy (Ei) : 7.0 (eV), the main absorption lines and its main parameters : adding -------------------- -------------------- abroad abroad abroad -- -- -- abroad - abroad -------------------- -------------------- abroad rural -- λ (nm) -- f -- W -- F -- S * CL -- R -- S -- East -------------------- -------------------- 250,000 250,000 - 250,000 - 250,000 ------------------ 250,000 250,000 -------- -------- things -- 307.3 -- -- 0.2 -- 0.02 N-A -- 14 -- -- 286.6 -- 0.2 -- N-A -- -- -- 289. 8 -- 0.2 -- N-A -- -- -- -- 368.2 -- -- 295.1 -- -- -- -- -- 302.0 -- -- -- -- 290. 4 -- -- -- -- 294.0 -- -- -- -- 296.4 -- 0.2 -- N-A -- 80 -- -- 368.2 -- 0.2 -- N-A -- -- -- 377.8 -- 0.2 -- N-A -- -- �-------------------- -------------------- Demonstration Demonstration -- Demonstration -- Demonstration Demonstration -------------------- -------------------- -------------------- Demonstration granted λ : wavelength f : oscillator strength W : monochromator-band spectra of N-A (nitrous oxide-acetylene flame) S * : Elements of the characteristics of concentration (1% absorption sensitivity) CL : Elements of the detection limit R S : the same major elements of absorption lines relative sensitivity F : Flame types
categories : single quality
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