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Praseodymium monophosphide
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<h2 id="synthesis">Synthesis</h2> <p>Praseoymium monophosphide can be prepared by heating praseodymium and phosphorus in the presence of iodine vapor:<a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a> </p> 4 Pr + P4 → 4 PrP <h2 id="physical-properties">Physical properties</h2> <p>Praseodymium monophosphide forms crystals of a cubic system, space group <i>Fm3m</i>, with cell parameters a = 0.5872 nm, Z = 4, and structure like <a href="/facts/Sodium_chloride/MWcXl3Mb">sodium chloride</a> NaCl.<a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a><a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a> It melts congruently at 3120 °C. </p> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>"Praseodymium Phosphide". American Elements. Retrieved 14 December 2021. <a href="https://www.americanelements.com/praseodymium-phosphide-12066-49-8" target="_blank">https://www.americanelements.com/praseodymium-phosphide-12066-49-8</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Toxic Substances Control Act (TSCA) Chemical Substance Inventory. Cumulative Supplement to the Initial Inventory: User Guide and Indices. United States Environmental Protection Agency. 1980. p. 252. Retrieved 14 December 2021. <a href="https://books.google.com/books?id=fkkJPwbY93gC&dq=Praseodymium+phosphide+PrP&pg=RA3-PA252" target="_blank">https://books.google.com/books?id=fkkJPwbY93gC&dq=Praseodymium+phosphide+PrP&pg=RA3-PA252</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>O'Bannon, Loran (6 December 2012). Dictionary of Ceramic Science and Engineering. Springer Science & Business Media. p. 199. ISBN 978-1-4613-2655-7. Retrieved 14 December 2021. <a href="978-1-4613-2655-7" target="_blank">978-1-4613-2655-7</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>Mironov, K. E. (1 January 1968). "A transport reaction for the growth of praseodymium phospide". Journal of Crystal Growth. 3–4: 150–152. Bibcode:1968JCrGr...3..150M. doi:10.1016/0022-0248(68)90115-2. Retrieved 14 December 2021. <a href="https://dx.doi.org/10.1016/0022-0248%2868%2990115-2" target="_blank">https://dx.doi.org/10.1016/0022-0248%2868%2990115-2</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>Nowacki, J. D. H. Donnay, and Werner (1954). Crystal Data: Classification of Substances by Space Groups and their Identification from Cell Dimensions. Geological Society of America. p. 509. ISBN 978-0-8137-1060-0. Retrieved 14 December 2021. {{cite book}}: ISBN / Date incompatibility (help)CS1 maint: multiple names: authors list (link) <a href="978-0-8137-1060-0" target="_blank">978-0-8137-1060-0</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>Yaduvanshi, Namrata; Singh, Sadhna (10 April 2018). Exploration of pressure induced phase transition in praseodymium phosphide (PrP) with the NaCl-type structure. Dae Solid State Physics Symposium 2017. AIP Conference Proceedings. Vol. 1942. p. 030001. Bibcode:2018AIPC.1942c0001Y. doi:10.1063/1.5028582. Retrieved 14 December 2021. <a href="https://aip.scitation.org/doi/10.1063/1.5028582" target="_blank">https://aip.scitation.org/doi/10.1063/1.5028582</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> </ol>