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Protactinyl nitrate

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Protactinyl nitrate
Names
Other names
  • Protactinium(V) oxynitrate
Identifiers
CAS Number
3D model (JSmol)
InChI
  • InChI=1S/3NO3.O.Pa/c3*2-1(3)4;;/q3*-1;;+3Key: HPGAUFDFQPEWQU-UHFFFAOYSA-N
SMILES
  • (O()=O)(O()=O)(O()=O)=O
Properties
Chemical formula PaO(NO3)3
Molar mass 433.05 g/mol
Appearance White solid
Melting point 400 °C (752 °F; 673 K) (decomposition)
Solubility in water Hydrolysis
Solubility Soluble in fuming nitric acid
Related compounds
Other cations Uranyl nitrate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references
Chemical compound

Protactinyl nitrate, protactinium(V) oxynitrate, or erroneously known as protactinium nitrate, is a radioactive chemical compound with the formula PaO(NO3)3·xH2O (1.5 ≤ x ≤ 4). It is a white solid that readily hydrolyzes to protactinium(V) oxide in moist air. This compound is a common commercial source of protactinium.

Preparation and decomposition

Protactinyl nitrate was first prepared in 1966 by reacting protactinium(V) chloride or protactinium(V) bromide with fuming nitric acid. Lower concentrations of nitric acid cannot be used, due to the hydrolysis of the compound.

Protactinyl nitrate decomposes at 400 °C to protactinium(V) oxide.

References

  1. ^ D. Brown; P. J. Jones (1966). "Quinquevalent protactinium, niobium, and tantalum nitrates and nitrato-complexes". Journal of the Chemical Society A: Inorganic, Physical, Theoretical: 733–737. doi:10.1039/J19660000733.
  2. ^ R. Grossmann; H.J. Maier; J. Szerypo; H.U. Friebel (2008). "Preparation of 231Pa targets". Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 590 (1–3): 122–125. doi:10.1016/j.nima.2008.02.084.
Protactinium compounds
Pa(II)
Pa(III)
Pa(IV)
Pa(V)
Salts and covalent derivatives of the nitrate ion
HNO3 He
LiNO3 Be(NO3)2 B(NO3)−4 RONO2
+CO3
+C2O4 		NO3
NH4NO3 		HOONO2 FNO3
+F 		Ne
NaNO3 Mg(NO3)2 Al(NO3)3
Al(NO3)−4 		Si P +SO4 ClONO2
+Cl 		Ar
KNO3 Ca(NO3)2 Sc(NO3)3 Ti(NO3)4 VO(NO3)3 Cr(NO3)3 Mn(NO3)2 Fe(NO3)2
Fe(NO3)3 		Co(NO3)2
Co(NO3)3 		Ni(NO3)2 CuNO3
Cu(NO3)2 		Zn(NO3)2 Ga(NO3)3 Ge As +SeO3 BrNO3
+Br 		Kr
RbNO3 Sr(NO3)2 Y(NO3)3 Zr(NO3)4 NbO(NO3)3 MoO2(NO3)2 Tc Ru Rh(NO3)3 Pd(NO3)2 AgNO3 Cd(NO3)2 In(NO3)3 Sn(NO3)4 Sb4O4(OH)2(NO3)2 Te INO3
+IO3 		Xe(NO3)2
CsNO3 Ba(NO3)2 * Lu(NO3)3 Hf(NO3)4 TaO(NO3)3 WO2(NO3)2 ReO3NO3 Os Ir3O(NO3)10 Pt Au(NO3)−4 Hg2(NO3)2
Hg(NO3)2 		TlNO3
Tl(NO3)3 		Pb(NO3)2 Bi(NO3)3
BiO(NO3) 		Po(NO3)4 At Rn
FrNO3 Ra(NO3)2 ** Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
 
* La(NO3)3 Ce(NO3)3
Ce(NO3)4 		Pr(NO3)3 Nd(NO3)3 Pm(NO3)3 Sm(NO3)3 Eu(NO3)3 Gd(NO3)3 Tb(NO3)3 Dy(NO3)3 Ho(NO3)3 Er(NO3)3 Tm(NO3)3 Yb(NO3)3
** Ac(NO3)3 Th(NO3)4 PaO(NO3)3 UO2(NO3)2 Np(NO3)4 Pu(NO3)4 Am(NO3)3 Cm(NO3)3 Bk(NO3)3 Cf(NO3)3 Es Fm Md No
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