Neodymium Arsenate

Neodymium arsenate
Names
	Other names Neodymium(III) arsenate
Identifiers
CAS Number	15479-84-2 ;
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
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

Short description: Inorganic chemical compound

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 pK_sp,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]

References

↑ 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.
↑ 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.
↑ 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
↑ 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.
↑ "New Mineral Names". American Mineralogist 85: 1321–1325. 2000.
↑ "Arsenoflorencite-(Nd) Mineral Data". https://www.webmineral.com/data/Arsenoflorencite-(Nd).shtml.

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[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 Arsenate

Preparation

See also

References