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Erbium(III) nitrate

Names
Other names Erbium trinitrate, Erbium nitrate
Identifiers
CAS Number	10031-51-3 hexahydrate: 13476-05-6 pentahydrate: 10031-51-3
3D model (JSmol)	Interactive image hexahydrate: Interactive image pentahydrate: Interactive image
ChemSpider	pentahydrate: 21241306
EC Number	pentahydrate: 233-436-7
PubChem CID	hexahydrate: 202892 pentahydrate: 53249207
CompTox Dashboard (EPA)	hexahydrate: DTXSID60158935 pentahydrate: DTXSID60692900
InChI hexahydrate: InChI=1S/Er.3NO3.6H2O/c;3*2-1(3)4;;;;;;/h;;;;6*1H2/q+3;3*-1;;;;;;Key: SXJVNCWLEGIRSJ-UHFFFAOYSA-N pentahydrate: InChI=1S/Er.3NO3.5H2O/c;3*2-1(3)4;;;;;/h;;;;5*1H2/q+3;3*-1;;;;;Key: LWHHUEHWVBVASY-UHFFFAOYSA-N
SMILES (=O)().(=O)().(=O)(). hexahydrate: (=O)().(=O)().(=O)().O.O.O.O.O.O. pentahydrate: (=O)().(=O)().(=O)().O.O.O.O.O.
Properties
Chemical formula	Er(NO3)3
Molar mass	353.274
Appearance	Pink crystals
Melting point	430 °C (806 °F; 703 K)
Solubility in water	Soluble
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H272, H315, H318, H319, H335
Precautionary statements	P210, P220, P221, P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P310, P312, P321, P332+P313, P337+P313, P362, P370+P378, P403+P233, P405, P501
Related compounds
Related compounds	Terbium(III) nitrate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references

Erbium(III) nitrate is an inorganic compound, a salt of erbium and nitric acid with the chemical formula Er(NO₃)₃. The compound forms pink crystals, readily soluble in water, also forms crystalline hydrates.

Synthesis

Dissolving metallic erbium in nitric acid:

${\displaystyle {\mathsf {Er+6HNO_{3}\ \xrightarrow {} \ Er(NO_{3})_{3}+3NO_{2}+3H_{2}O\uparrow }}}$

Dissolving erbium oxide or hydroxide in nitric acid:

${\displaystyle {\mathsf {Er(OH)_{3}+3HNO_{3}\ \xrightarrow {} \ Er(NO_{3})_{3}+3H_{2}O\uparrow }}}$

Reaction of nitrogen dioxide with metallic erbium:

${\displaystyle {\mathsf {Er+3N_{2}O_{4}\ \xrightarrow {} \ Er(NO_{3})_{3}+3NO\uparrow }}}$

Physical properties

Erbium(III) nitrate forms pink hygroscopic crystals.

Forms crystalline hydrates of the composition ${\displaystyle {\ce {Er(NO3)3*5H2O}}}$.

Both erbium(III) nitrate and its crystalline hydrate decompose on heating.

Dissolves in water and EtOH.

Chemical properties

The hydrated erbium nitrate thermally decomposed to form ErONO₃ and then to erbium oxide.

Applications

It is used to obtain metallic erbium and is also used as a chemical reagent.

References

1. Steglich, Patrick (21 October 2020). Electromagnetic Propagation and Waveguides in Photonics and Microwave Engineering. BoD – Books on Demand. p. 42. ISBN 978-1-83968-188-2. Retrieved 19 August 2021.
2. Милешко, Леонид; Гапоненко, Николай (21 February 2020). Основы процессов получения легированных оксидных пленок методами золь-гель технологии и анодного окисления (in Russian). Litres. p. 42. ISBN 978-5-04-234580-7.
3. Лидин, Ростислав; Молочко, Вадим; Андреева, Лариса (2 February 2019). Константы неорганических веществ. Справочник (in Russian). Litres. p. 37. ISBN 978-5-04-077039-7. Retrieved 19 August 2021.
4. Registry of Toxic Effects of Chemical Substances. National Institute for Occupational Safety and Health. 1987. p. 2186. Retrieved 19 August 2021.
5. Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 3120. ISBN 978-0-412-30120-9. Retrieved 19 August 2021.
6. Sr, Richard J. Lewis (13 June 2008). Hazardous Chemicals Desk Reference. John Wiley & Sons. p. 591. ISBN 978-0-470-18024-2. Retrieved 19 August 2021.

• Erbium compounds
• Nitrates