Holmium(III) nitrate
Names
Other names
Holmium trinitrate, Holmium nitrate
Identifiers
ChemSpider
ECHA InfoCard 100.030.386
EC Number
InChI=1S/Ho.3NO3/c;3*2-1(3)4/q+3;3*-1
Key: WDVGLADRSBQDDY-UHFFFAOYSA-N
pentahydrate: InChI=1S/Ho.3NO3.5H2O/c;3*2-1(3)4;;;;;/h;;;;5*1H2/q+3;3*-1;;;;;
Key: BJUGWWDCFYEYOA-UHFFFAOYSA-N
hexahydrate: InChI=1S/Ho.3NO3.6H2O/c;3*2-1(3)4;;;;;;/h;;;;6*1H2/q+3;3*-1;;;;;;
Key: OMTYKYWUMGRKES-UHFFFAOYSA-N
[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[Ho+3]
pentahydrate: [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].O.O.O.O.O.[Ho+3]
hexahydrate: [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].O.O.O.O.O.O.[Ho+3]
Properties
Ho(NO3 )3
Molar mass
350,95
Appearance
Yellowish crystals
Melting point
754 °C (1,389 °F; 1,027 K)
Soluble
Hazards
GHS labelling
Warning
H272 , H315 , H319 , H335
P210 , P220 , P221 , P261 , P264 , P271 , P280 , P302+P352 , P304+P340 , P305+P351+P338 , 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 [77 °F], 100 kPa).
Chemical compound
Holmium (III) nitrate is an inorganic compound , a salt of holmium and nitric acid with the chemical formula Ho(NO3 )3 .[ 1] [ 2]
Synthesis
Anhydrous salt is obtained by the action of nitrogen dioxide on holmium(III) oxide :
2
H
o
2
O
3
+
9
N
2
O
4
→
150
o
C
4
H
o
(
N
O
3
)
3
+
6
N
O
{\displaystyle {\mathsf {2Ho_{2}O_{3}+9N_{2}O_{4}\ {\xrightarrow {150^{o}C}}\ 4Ho(NO_{3})_{3}+6NO}}}
Effect of nitrogen dioxide on metallic holmium:
H
o
+
3
N
2
O
4
→
200
o
C
H
o
(
N
O
3
)
3
+
3
N
O
{\displaystyle {\mathsf {Ho+3N_{2}O_{4}\ {\xrightarrow {200^{o}C}}\ Ho(NO_{3})_{3}+3NO}}}
Reaction of holmium hydroxide and nitric acid:
H
o
(
O
H
)
3
+
3
N
H
O
3
→
150
o
C
H
o
(
N
O
3
)
3
+
3
H
2
O
{\displaystyle {\mathsf {Ho(OH)_{3}+3NHO_{3}\ \xrightarrow {150^{o}C} \ Ho(NO_{3})_{3}+3H_{2}O}}}
Physical properties
Holmium(III) nitrate forms yellowish crystals.
Forms a crystalline hydrate of the composition Ho(NO3 )3 •5H2 O.[ 3]
Soluble in water and ethanol .
Chemical properties
Hydrated holmitic nitrate thermally decomposes to form HoONO3 and decomposes to holmium oxide upon subsequent heating.
Application
The compound is used for the production of ceramics and glass.
Also used to produce metallic holmium and as a chemical reagent.
References
Salts and covalent derivatives of the
nitrate ion
