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]
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| Names | |
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| Other names
Neodymium(III) arsenate
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| Identifiers | |
3D model (JSmol)
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| Properties | |
| NdAsO4 | |
| Molar mass | 313.89 |
| Appearance | faint pink powder |
| Density | 5.3-5.9 g/cm3[1] |
| insoluble | |
| Hazards | |
| GHS labelling: | |
  
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| Danger | |
| H300, H314, H350, H410 | |
| P201, P264, P273, P280, P305+P351+P338, P310 | |
| Related compounds | |
Other anions
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Neodymium(III) nitrate Neodymium(III) phosphate Neodymium(III) antimonate Neodymium(III) bismuthate Neodymium(III) carbonate |
Other cations
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PrAsO4 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Preparation
editNeodymium 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
editReferences
edit- ^ Donnay, Joseph Désiré Hubert (1973). Crystal Data: Inorganic compounds. National Bureau of Standards. p. M71.
- ^ 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.
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