Promethium(III) phosphate

{{Chembox

| Name = promethium(III) phosphate

| ImageFile =File:Phosphat-Ion.svg61px

| IUPACName =

| OtherNames =

| Section1 = {{Chembox Identifiers

| CASNo = 14014-68-7

| CASNo_Ref = {{cascite|correct|CAS}}

| PubChem = 159478665

| PubChem_Comment = (charge error)

| InChI=1S/H3O4P.Pm/c1-5(2,3)4;/h(H3,1,2,3,4);/q;+3/p-3

| InChIKey=LWSFGPKHSQZZME-UHFFFAOYSA-K

| SMILES = [O-]P(=O)([O-])[O-].[Pm+3]

}}

| Section2 = {{Chembox Properties

| Formula = PmPO₄

| MolarMass = 241.89

| Appearance = pale yellow solid (hydrate)
garnet-red solid (anhydride)

| Density =

| MeltingPt =

| BoilingPt =

| Solubility = insoluble}}

| Section3 = {{Chembox Hazards

| MainHazards =

| FlashPt =

| Autoignition = }}

}}

Promethium(III) phosphate is an inorganic compound, a salt of promethium and phosphate, with the chemical formula of PmPO₄. It is radioactive. Its hydrate can be obtained by precipitation of soluble promethium salt and diammonium hydrogen phosphate at pH 3~4 (or obtained by hydrothermal reaction {{cite journal|journal=MRS Proceedings|volume=985|language=en|issn=0272-9172|year=2006|doi=10.1557/PROC-985-0985-NN04-08|url=https://www.cambridge.org/core/product/identifier/S1946427400060589/type/journal_article|title=Hydrothermal Methods as a New Way of Actinide Phosphate Preparation|accessdate=2021-01-16|author1=Nicolas Clavier|author2= Nicolas Dacheux|author3= Gilles Wallez|author4= Michel Quarton|article-number=0985-NN04-08 |url-access=subscription}}), and the hydrate can be obtained by burning at 960 °C to obtain the anhydrous form.{{cite journal|journal=Journal of the American Ceramic Society|volume=48|issue=7|language=en|issn=0002-7820|date=July 1965|pages=383–384|doi=10.1111/j.1151-2916.1965.tb14768.x|url=http://doi.wiley.com/10.1111/j.1151-2916.1965.tb14768.x|title=Unit Cells of the Monazite-Type Rare-Earth Phosphates|accessdate=2021-01-16|author1=F. Weigel|author2= V. Scherer|author3= H. Henschel|url-access=subscription}} Its standard enthalpy of formation is −464 kcal/mol.{{cite journal|last1=Marinova|first1= L. A.|last2= Yaglov|first2= V. N.|title= Thermodynamic characteristics of phosphates of lanthanides|journal=Zhurnal Fizicheskoi Khimii|year=1976|volume= 50|issue=3|page= 802|issn= 0044-4537}}