Neodymium nitrate

From Crystal growing
Jump to: navigation, search


  Neodymium nitrate   
Names:
Formula: Nd(NO3)3 (anhydrous)
Nd(NO3)3 · 4H2O (tetrahydrate)
Nd(NO3)3 · 6H2O (hexahydrate)
SMILES: [N+](=O)(O)[O-].[N+](=O)(O)[O-].[N+](=O)(O)[O-].[Nd+3]
Molar mass: 330.252 g/mol (anhydrous)
402.312 g/mol (tetrahydrate)
438.341 g/mol (hexahydrate)
Density: 2.27 g/cm3 (hexahydrate)
Crystal system: triclinic (hexahydrate)
a=9.307 Å
9.3070 Å
0.9307 nm
, b=11.747 Å
11.7470 Å
1.1747 nm
, c=6.776 Å
6.7760 Å
0.6776 nm
α=91.11°
91°6′36.0″  
, β=112.24°
112°14′24.0″  
, γ=109.15°
109°9′  

Shapes:
https://media.crystalls.info/w/uploads/media/Beveled_tetragonal_prism.json
https://media.crystalls.info/w/uploads/media/Prolongated_tetragonal_pyramidal_prism.json

Color: violet
purple
Melting point: 23 °C
296.15 K
73.4 °F
533.07 °R
(α-hexahydrate)
67.5 °C
340.65 K
153.5 °F
613.17 °R
(β-hexahydrate)
Optical properties: pleochroism
Magnetic properties: paramagnetic
Stability: hygroscopic (anhydrous)
stable (hexahydrate)
Hardness: relatively strong
Toxicity: highly toxic
LD50=66.8mg/kg

Description

Inorganic compound, salt of trivalent metal neodymium and inorganic nitric acid. From water solutions crystallizes as hexahydrate and tetrahydrate.

Precursors

Reaction between neodymium carbonate, hydroxide or oxide and nitric acid

Chemical equation:

Nd2(CO3)3 + 6HNO3 = 2Nd(NO3)3 + 3H2O + 3CO2
Nd(OH)3 + 3HNO3 = Nd(NO3)3 + 3H2O
Nd2O3 + 6HNO3 = 2Nd(NO3)3 + 3H2O

For preparation of 100.00g of neodymium nitrate hexahydrate а 53.44g of neodymium carbonate or 44.55g of hydroxide or 38.38g of oxide and 66.35g of 65% acid is required.
Add acid to the flask, then add small parts of neodymium compound with stirring until it will totally dissolve . After reaction will stop, filter the solution and use it for crystal growing.

Reaction between metal neodymium and nitric acid

Chemical equation:

Nd + 6HNO3 = Nd(NO3)3 + 3NO↑ + 3H2O

For preparation of 100.00g of neodymium nitrate hexahydrate а 32.91g of pure neodymium and 132.69g of 65% acid is required.
Add acid solution to the flask, then add neodymium pieces, shavings or powder and stir it until gas emission will stop.

Reaction between neodymium sulfate and calcium or lead(II) nitrate

You can use neodymium chloride instead of sulfate if you use lead salt..
Chemical equation:

Nd2(SO4)3 + 3Ca(NO3)2 = 3CaSO4↓ + 2Nd(NO3)3
Nd2(SO4)3 + 3Pb(NO3)2 = 3PbSO4↓ + 2Nd(NO3)3
2NdCl3 + 3Pb(NO3)2 = 3PbCl2↓ + 2Nd(NO3)3

For preparation of 100.00g of neodymium nitrate hexahydrate а 82.22g of neodymium sulfate octahydrate or 81.83g of neodymium chloride hexahydrate and 113.34g of lead(II) nitrate or 80.81g of calcium nitrate tetrahydrate is required.
Add to the flask with calcium or lead nitrate solution small parts of neodymium salt solution and stir. The large amount of poorly soluble precipitate will form. Settle it out and discard, then filter the solution carefully.

Reaction between neodymium carbonate orhydroxide and ammonium nitrate

Chemical equation:

Nd2(CO3)3 + 6NH4NO3 = 2Nd(NO3)3 + 3H2O + 3NH3↑ + 3CO2
Nd(OH)3 + 3NH4NO3 = Nd(NO3)3 + 3H2O + 3NH3

For preparation of 100.00g of neodymium nitrate hexahydrate а 44.55g of neodymium hydroxide or 53.44g of carbonate and 54.78g of ammonium nitrate is required.
Add to the flask suspended in water neodymium compounds and then add small parts of hot nitrate ammonium solution with heating and stirring. Emission of large amount of ammonia will begin.Attention, exuding ammonia irritates eyes and lungs! The synthesis should be carried out only in a fume hood or outdoors!

Storage conditions

Store in its original form or under several layers of varnish at average humidity and room temperature. Do not store in matchboxes or cotton wool and do not heat.

Solubility

Temperatureгр/100,00 гр water
(anhydrous)(hexahydrate)
0°C
273.15 K
32 °F
491.67 °R
127.1
127.1 g/100g
55.967 %
10°C
283.15 K
50 °F
509.67 °R
~132
132 g/100g
56.897 %
15°C
288.15 K
59 °F
518.67 °R
134.6
134.6 g/100g
57.374 %
20°C
293.15 K
68 °F
527.67 °R
138.3
138.3 g/100g
58.036 %
25°C
298.15 K
77 °F
536.67 °R
154.4
154.4 g/100g
60.692 %
406
406 g/100g
80.237 %
30°C
303.15 K
86 °F
545.67 °R
145.0
145 g/100g
59.184 %
40°C
313.15 K
104 °F
563.67 °R
159.3
159.3 g/100g
61.435 %
50°C
323.15 K
122 °F
581.67 °R
184.6
184.6 g/100g
64.863 %
60°C
333.15 K
140 °F
599.67 °R
203.0
203 g/100g
66.997 %
70°C
343.15 K
158 °F
617.67 °R
305.5
305.5 g/100g
75.339 %
Soluble in ethanol and acetone.

Gallery


Sources


Navigation