60, Neodym (Nd)

gr. neo = neu, didymos = Zwilling, neuer Zwilling

Säure-Base-Verhalten:

         
   
  Pr Nd Pm  
  Pa U Np  
         
   
 
   
   
   
   
   

Säure/Base-Verhalten der Neodym-Oxide:

  Reaktionen mit:
HF
100%
H2SO4
conc.
HCl
20%
CH3COOH
25%
H2O NH3
25%
NaOH 10%
kalt
NaOH 50%
heiß
NaOH liq.
400°C
Nd2O3 NdF3 Nd2(SO4)3 NdCl3 (CH3COO)3Nd Nd(OH)3 Nd(OH)3 Nd(OH)3 NaNd(OH)4 Na3Nd(OH)6
 
Legende: Lösung   Unlöslich   sauer →  neutral  → alkalisch  
 
 

pKS-Werte von Säure-Base-Paaren (HA + H2O ↔ H3O+ + A-) :

Säurename Formel pKS-Wert Basenname Formel pKB-Wert

Neodym(III)-Ion Nd3+ 8.10 Hydroxo-Neodym(III)-Ion Nd(OH)2+ 5.9
Hydroxo-Neodym(III)-Ion Nd(OH)2+ 8.80 Dihydroxo-Neodym(III)-Ion Nd(OH)2+ 5.2
Dihydroxo-Neodym(III)-Ion Nd(OH)2+ 9.50 Neodym(III)hydroxid Nd(OH)3 4.5
Neodym(III)hydroxid Nd(OH)3 10.7 Tetrahydroxo-Neodymat(III)-Ion Nd(OH)4- 3.3