Americium(III) oxide or americium sesquioxide is an oxide of the element americium. It has the empirical formula Am2O3. Since all isotopes of americium are only artificially produced, americium (III) oxide has no natural occurrence. The colour depends on the crystal structure, of which there are more than one. It is soluble in acids.[2]
Americium(III) oxide can be made by heating americium dioxide in hydrogen at 600°C.[3]
Formsedit
The hexagonal form is coloured tan, and the cubic form is coloured red-brown the same as persimmon.[3] The cubic form converts to the hexagonal form on heating to 800°C.[3] The cubic form is non-stoichimetric with variable oxygen composition. It darkens with increasing oxygen.[3]
Referencesedit
^Christine Guéneau; Alain Chartier; Paul Fossati; Laurent Van Brutzel; Philippe Martin (2020). "Thermodynamic and Thermophysical Properties of the Actinide Oxides". Comprehensive Nuclear Materials 2nd Ed. 7: 111–154. doi:10.1016/B978-0-12-803581-8.11786-2. ISBN9780081028667. S2CID 261051636.
^Lide, David R. (1995). CRC Handbook of Chemistry and Physics: A Ready-reference Book of Chemical and Physical Data. CRC Press. p. 4-38. ISBN978-0-8493-0595-5.
^ abcdChikalla, T.D.; Eyring, L. (January 1968). "Phase relationships in the americium-oxygen system". Journal of Inorganic and Nuclear Chemistry. 30 (1): 133–145. doi:10.1016/0022-1902(68)80072-7.
April 12, 2024
americium, oxide, americium, sesquioxide, oxide, element, americium, empirical, formula, am2o3, since, isotopes, americium, only, artificially, produced, americium, oxide, natural, occurrence, colour, depends, crystal, structure, which, there, more, than, solu. Americium III oxide or americium sesquioxide is an oxide of the element americium It has the empirical formula Am2O3 Since all isotopes of americium are only artificially produced americium III oxide has no natural occurrence The colour depends on the crystal structure of which there are more than one It is soluble in acids 2 Americium III oxide NamesOther names Americium sesquioxideIdentifiersCAS Number 12254 64 73D model JSmol Interactive imagePubChem CID 22506319InChI InChI 1S 2Am 3O q2 3 3 2Key HPWBMQLLXMZFDK UHFFFAOYSA NSMILES O 2 O 2 O 2 Am 3 Am 3 PropertiesChemical formula Am 2O 3Molar mass 534 g mol 1Density 11 77Melting point 2 205 C 4 001 F 2 478 K StructureCrystal structure Trigonal hP5Space group P3 m1 No 164Lattice constant a 381 7 pm c 597 1 pm 1 Related compoundsOther cations Curium III oxideRelated compounds Americium dioxide Americium II oxideExcept where otherwise noted data are given for materials in their standard state at 25 C 77 F 100 kPa Infobox referencesFormation editAmericium III oxide can be made by heating americium dioxide in hydrogen at 600 C 3 2AmO2 H2 Am2O3 H2O displaystyle ce 2 AmO2 H2 gt Am2O3 H2O nbsp Forms editThe hexagonal form is coloured tan and the cubic form is coloured red brown the same as persimmon 3 The cubic form converts to the hexagonal form on heating to 800 C 3 The cubic form is non stoichimetric with variable oxygen composition It darkens with increasing oxygen 3 References edit Christine Gueneau Alain Chartier Paul Fossati Laurent Van Brutzel Philippe Martin 2020 Thermodynamic and Thermophysical Properties of the Actinide Oxides Comprehensive Nuclear Materials 2nd Ed 7 111 154 doi 10 1016 B978 0 12 803581 8 11786 2 ISBN 9780081028667 S2CID 261051636 Lide David R 1995 CRC Handbook of Chemistry and Physics A Ready reference Book of Chemical and Physical Data CRC Press p 4 38 ISBN 978 0 8493 0595 5 a b c d Chikalla T D Eyring L January 1968 Phase relationships in the americium oxygen system Journal of Inorganic and Nuclear Chemistry 30 1 133 145 doi 10 1016 0022 1902 68 80072 7 Retrieved from https en wikipedia org w index php title Americium III oxide amp oldid 1176704299, wikipedia, wiki, book, books, library,
