Neodymium arsenate

Short description: Inorganic chemical compound

Neodymium arsenate

Names
Other names

Neodymium(III) arsenate

Identifiers

CAS Number

* 15479-84-2 Y

3D model (JSmol)

* Interactive image

InChI

* InChI=1S/AsH3O4.Nd/c2-1(3,4)5;/h(H3,2,3,4,5);/q;+3/p-3

Key: NDJXBXBULAKKIO-UHFFFAOYSA-K

SMILES

* [O-][As](=O)([O-])[O-].[Nd+3]

Properties

Chemical formula

| NdAsO4
Molar mass | 313.89
Appearance  | faint pink powder
Density | 5.3-5.9 g/cm3[1]

Solubility in water

| insoluble
Hazards
GHS pictograms |
GHS Signal word | Danger

GHS hazard statements

| H350, H300, H314, H410

GHS precautionary statements

| P201, P264, P273, P280, P305+351+338, P310
Related compounds

Other anions

| Neodymium(III) nitrate
Neodymium(III) phosphate
Neodymium(III) antimonate
Neodymium(III) bismuthate
Neodymium(III) carbonate

Other cations

| PrAsO4

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

Infobox references

Neodymium arsenate, also known as neodymium(III) arsenate, is the arsenate of neodymium with the chemical formula of NdAsO4. In this compound, neodymium exhibits the +3 oxidation state. It has good thermaostability, and its pKsp,c is 21.86±0.11.[2]

## Preparation

Neodymium arsenate can be obtained from the reaction between sodium arsenate (Na3AsO4) and neodymium chloride (NdCl3) in solution:[3]

Na3AsO4 \+ NdCl3 → 3 NaCl \+ NdAsO4↓

When crystallizing from a lead pyroarsenate flux, neodymium arsenate crystals produced explode when cooled.[4]

Neodymium arsenate also occurs in nature as a mineral, Arsenoflorencite-(Nd).[5][6]

## See also

* Arsenic

## References

1. ↑ Donnay, Joseph Désiré Hubert (1973) (in en). Crystal Data: Inorganic compounds. National Bureau of Standards. p. M71. https://books.google.com/books?id=5lVCBwmZsLYC&pg=RA2-PA71.
2. ↑ Firsching, F. Henry. (1992). "Solubility products of the trivalent rare-earth arsenates". Journal of Chemical and Engineering Data 37 (4): 497–499. doi:10.1021/je00008a028.
3. ↑ Gabisoniya, Ts. D.; Nanobashvili, E. M.. Synthesis of rare earth metal arsenates. Soobshcheniya Akademii Nauk Gruzinskoi SSR (1980), 97(2), 345-8. ISSN 0002-3167
4. ↑ Feigelson, Robert S. (August 1967). "Crystal Growth of Rare-Earth Orthoarsenates". Journal of the American Ceramic Society 50 (8): 433–434. doi:10.1111/j.1151-2916.1967.tb15150.x.
5. ↑ "New Mineral Names". American Mineralogist 85: 1321–1325. 2000.
6. ↑ "Arsenoflorencite-(Nd) Mineral Data". https://www.webmineral.com/data/Arsenoflorencite-(Nd).shtml.

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Neodymium compounds

* NdAl3(BO3)4
* NdBr3
* NdCl3
* NdF3
* Nd(OH)3
* NdNiO3
* NdN
* Nd(NO3)3
* Nd2O3
* Nd2(SO4)3

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*[H350]: May cause cancer
*[H300]: Fatal if swallowed
*[H314]: Causes severe skin burns and eye damage
*[H410]: Very toxic to aquatic life with long lasting effects
*[P201]: Obtain special instructions before use
*[P264]: Wash … thoroughly after handling
*[P273]: Avoid release to the environment
*[P280]: Wear protective gloves/protective clothing/eye protection/face protection
*[P305+351+338]: IF IN EYES: Rinse continuously with water for several minutes. Remove contact lenses if present and easy to do – continue rinsing
*[P310]: Immediately call a POISON CENTER or doctor/physician
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