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Neodymium arsenate

Neodymium arsenate
Names
Other names
Neodymium(III) arsenate
Identifiers
3D model (JSmol)
  • InChI=1S/AsH3O4.Nd/c2-1(3,4)5;/h(H3,2,3,4,5);/q;+3/p-3
    Key: NDJXBXBULAKKIO-UHFFFAOYSA-K
  • [O-][As](=O)([O-])[O-].[Nd+3]
Properties
NdAsO4
Molar mass 313.89
Appearance faint pink powder
Density 5.3-5.9 g/cm3[1]
insoluble
Hazards
GHS labelling:
GHS06: ToxicGHS08: Health hazardGHS09: Environmental hazard
Danger
H300, H314, H350, H410
P201, P264, P273, P280, P305+P351+P338, 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).

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 thermal stability, 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.[5]

See also

References

  1. ^ Donnay, Joseph Désiré Hubert (1973). Crystal Data: Inorganic compounds. National Bureau of Standards. p. M71.
  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.


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