Abstract
THE two oxides of praseodymium described in the literature are the light green sesquioxide and the dark brown ‘air-ignited’ oxide. It is generally agreed that the composition of the latter approximates to Pr6O11. Prandtl and his school1 claim that praseodymium can exhibit a higher valency of 5, and on this basis designate the air-ignited oxide as 2Pr2O3.Pr2O5. Marsh2 affirms, however, that praseodymium possesses a maximum valency of 4, a conclusion which is well supported by the work of Zintl and Morawietz3, and represents Pr6O11 as the double oxide, 4PrO2.Pr2O3.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
Prandtl, Z. anorg. Chem., 149, 235 (1925); 238, 225 (1938).
Marsh, J. Chem. Soc., 15 (1946).
Zintl and Morawietz, Z. anorg. Chem., 245, 26 (1940).
Wilson, Proc. Roy. Soc., A, 133, 458 (1931); 134, 277 (1932).
Pauling, Z. Krist., 69, 415 (1928).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
MARTIN, R. Oxides of Praseodymium. Nature 165, 202–203 (1950). https://doi.org/10.1038/165202b0
Issue Date:
DOI: https://doi.org/10.1038/165202b0
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.
