Hafnium nitrate

Names
Other names

Hafnium tetranitrate

Identifiers

CAS Number

* 15509-05-4

3D model (JSmol)

* Interactive image

ChemSpider |

* 146363

EC Number |

* 239-536-7

PubChem CID

* 167292

InChI

* InChI=1S/Hf.4NO3/c;4*2-1(3)4/q+4;4*-1

Key: TZNXTUDMYCRCAP-UHFFFAOYSA-N

SMILES

* [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[Hf+4]

Properties

Chemical formula

| Hf(NO3)4
Molar mass | 426.53 g/mol
Appearance  | White crystals

Solubility in water

| moderately soluble[1]
Hazards
GHS pictograms |
GHS Signal word | Danger

GHS hazard statements

| H272, H315, H319, H335

GHS precautionary statements

| P210, P220, P221, P305, P338, P405, P501
Related compounds

Related compounds

| Thorium nitrate, Zirconium nitrate, titanium nitrate

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Infobox references

Tracking categories (test):

* SizeSet

Hafnium(IV) nitrate is an inorganic compound, a salt of hafnium and nitric acid with the chemical formula Hf(NO3)4.[2][3][4]

## Contents

* 1 Synthesis
* 2 Properties
* 3 Applications
* 4 References

## Synthesis

Hafnium nitrate can be prepared by the reaction of hafnium tetrachloride and dinitrogen pentoxide.[5]

## Properties

Hafnium nitrate is slightly volatile, and can be sublimed at 110 °C and 0.1 mmHg.[6] Hafnium nitrate decomposes on heating (≥ 160°C) to HfO(NO3)2 and then to HfO2.[6]

## Applications

Hafnium nitrate can be used for the preparation of materials containing hafnium dioxide.[6]

## References

1. ↑ "Hafnium Nitrate (CAS: 15509-05-4) | Stanford Advanced Materials" (in en). samaterials.com. https://www.samaterials.com/hafnium-nitrate.html.
2. ↑ "Hafnium(IV) nitrate". Sigma Aldrich. https://www.sigmaaldrich.com/RU/en/product/aldrich/530778.
3. ↑ "Hafnium Nitrate". American Elements. https://www.americanelements.com/hafnium-nitrate-15509-05-4.
4. ↑ (in en) The Metallurgy of Hafnium. Naval Reactors, Division of Reactor Development, U.S. Atomic Energy Commission. 1960. p. 31. https://books.google.com/books?id=dqKgCIbq7hEC&dq=hafnium+nitrate&pg=PA31. Retrieved 29 October 2021.
5. ↑ Zhuang, Weiwei; Conley, John F.; Ono, Yoshi; Evans, David R.; Solanki, R. (January 2002). "Hafnium Nitrate Precursor Synthesis and HfO2 Thin Film Deposition". Integrated Ferroelectrics 48 (1): 3–12. doi:10.1080/10584580215449. Bibcode: 2002InFer..48....3Z.
6. ↑ 6.0 6.1 6.2 Conley, J. F.; Ono, Y.; Zhuang, W.; Tweet, D. J.; Gao, W.; Mohammed, S. K.; Solanki, R. (2002). "Atomic Layer Deposition of Hafnium Oxide Using Anhydrous Hafnium Nitrate" (in en). Electrochemical and Solid-State Letters 5 (5): C57. doi:10.1149/1.1462875. ISSN 1099-0062. https://iopscience.iop.org/article/10.1149/1.1462875. Retrieved 29 October 2021.

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Hafnium compounds

Hf(II)|

* HfB2

Hf(IV)|

* HfC
* HfBr4
* HfCl4
* HfF4
* HfI4
* Hf(C5H7O2)4
* HfO2
* HfSiO4
* HfS2
* Ta4HfC5

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Salts and covalent derivatives of the nitrate ion

HNO3 |  |  |  | He

|
|
|
|

LiNO3 | Be(NO3)2 | B(NO3)−4 | C  | NO−3,
NH4NO3 | O  | FNO3 | Ne
NaNO3 | Mg(NO3)2 | Al(NO3)3 | Si  | P  | S  | ClONO2 | Ar
KNO3 | Ca(NO3)2 | Sc(NO3)3 | Ti(NO3)4 | VO(NO3)3 | Cr(NO3)3 | Mn(NO3)2 | Fe(NO3)3,
Fe(NO3)2 | Co(NO3)2,
Co(NO3)3 | Ni(NO3)2 | Cu(NO3)2 | Zn(NO3)2 | Ga(NO3)3 | Ge  | As  | Se  | Br  | Kr
RbNO3 | Sr(NO3)2 | Y(NO3)3 | Zr(NO3)4 | Nb  | Mo  | Tc  | Ru  | Rh  | Pd(NO3)2 | AgNO3 | Cd(NO3)2 | In  | Sn  | Sb(NO3)3 | Te  | I  | Xe(NO3)2
CsNO3 | Ba(NO3)2 |  | Hf  | Ta  | W  | Re  | Os  | Ir  | Pt  | Au  | Hg2(NO3)2,
Hg(NO3)2 | Tl(NO3)3,
TlNO3 | Pb(NO3)2 | Bi(NO3)3
BiO(NO3) | Po  | At  | Rn
FrNO3 | Ra(NO3)2 |  | 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  | Nd(NO3)3 | Pm  | Sm  | Eu(NO3)3 | Gd(NO3)3 | Tb(NO3)3 | Dy  | Ho  | Er  | Tm  | Yb  | Lu
Ac(NO3)3 | Th(NO3)4 | Pa  | UO2(NO3)2 | Np  | Pu  | Am  | Cm  | Bk  | Cf  | Es  | Fm  | Md  | No  | Lr

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*[CID]: Compound ID
*[H272]: May intensify fire: oxidizer
*[H315]: Causes skin irritation
*[H319]: Causes serious eye irritation
*[H335]: May cause respiratory irritation
*[P210]: Keep away from heat/sparks/open flames/hot surfaces – No smoking
*[P220]: Keep/Store away from clothing/…/combustible materials
*[P221]: Take any precaution to avoid mixing with combustibles
*[P305]: IF IN EYES:
*[P338]: Remove contact lenses if present and easy to do. continue rinsing
*[P405]: Store locked up
*[P501]: Dispose of contents/container to …
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