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Praséodimium, ₅₉Pr
Praséodimium; praseyodimiyum·
Pabaosan	/ˌpreɪziːəˈdɪmiəm/ (PRAY-zee-ə-DIM-ee-əm)
Cingakan	petak klau
Bobot atom standar Ar, std(Pr)	140.90766(1)
Praséodimium ring tabél périodik
	sérium ← praséodimium → néodimium
Wilangan atom (Z)	59
Watek	n/a
Période	période 6
Blok	blok-f
Konpigurasi éléktron	[Xé] 4f3 6s2
Éléktron per kulit	2, 8, 18, 21, 8, 2
Cecirén pisik
Pase ring STP	padet
Titik lebur	1208 K (935 °C, 1715 °F)
Titik didih	3403 K (3130 °C, 5666 °F)
Kapadetan (nampek s.r.)	6.77 g/cm3
ri kala éncéh (ring t.l.)	6.50 g/cm3
Panes fusi	6.89 kJ/mol
Panes panguapan	331 kJ/mol
Kapasitas panes molar	27.20 J/(mol·K)
Cecirén atom
Paindikan oksidasi	0, +1, +2, +3, +4, +5 (oksida basa tenga)
Kaéléktronégatipan	skala Pauling: 1.13
Wasa ionisasi	ka-1: 527 kJ/mol ; ka-2: 1020 kJ/mol ; ka-3: 2086 kJ/mol ; ;
Jeriji atom	émpiris: 182 pm
Jeriji kovalén	203±7 pm
	Garis spéktral saking praséodimium
Cecirén liyanan
Rupa alami	primordial
Struktur kristal	susunan padat heksagon ganda (dhcp)
Kagelisan swara pales tipis	2280 m/s (ring 20 °C)
Ékspansi térmal	α, poly: 6.7 µm/(m⋅K) (ring s.r.)
Konduktivitas térmal	12.5 W/(m⋅K)
Resistivitas listrik	α, poly: 0.700 µΩ⋅m (ring s.r.)
bacakan magnétik	paramagnétik
Karentanan magnétik molar	+5010.0×10−6 cm3/mol (293 K)
Modulus Young	rupa α: 37.3 GPa
Modulus Shear	rupa α: 14.8 GPa
Modulus Bulk	rupa α: 28.8 GPa
Rasio Poisson	rupa α: 0.281
Kakatosan Vickers	250–745 MPa
Kakatosan Brinell	250–640 MPa
Nomor CAS	7440-10-0
Lelintihan
Panemuan	Carl Auer von Welsbach (1885)
Isotop utama praséodimium
ε	142Ce
	Kategori:Praséodimium; cingak; pabligbagan; uah; \| pustaka

Praséodimium silih tunggil datu kimia antuk simbol Pr miwah wilangan atom 59. Punika anggota katiga saking dérét lantanida miwah sacara tradisional kanikayang silih tunggil logam tanah langka. Praséodimium pinaka logam sané bélék, kapérakan, prasida kaprapén miwah ulet, kahargain krana cecirém magnétik, listrik, kimia, miwah optik nyané. Sanget réaktif antuk katemuin ring rupa asli, miwah logam praséodimium murni alon-alon dados lapisan oksida ijo ri kala keni udara.

Pustaka

↑ Mal:OED
↑ Méija, Juris; et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry. 88 (3): 265–91. doi:10.1515/pac-2015-0305.
↑ Yttrium and all lanthanides except Ce and Pm have been observed in the oxidation state 0 in bis(1,3,5-tri-t-butylbenzene) complexes, see Cloke, F. Geoffrey N. (1993). "Zero Oxidation State Compounds of Scandium, Yttrium, and the Lanthanides". Chem. Soc. Rev. 22: 17–24. doi:10.1039/CS9932200017. and Arnold, Polly L.; Petrukhina, Marina A.; Bochenkov, Vladimir E.; Shabatina, Tatyana I.; Zagorskii, Vyacheslav V.; Cloke (2003-12-15). "Arene complexation of Sm, Eu, Tm and Yb atoms: a variable temperature spectroscopic investigation". Journal of Organometallic Chemistry. 688 (1–2): 49–55. doi:10.1016/j.jorganchem.2003.08.028.
↑ Chen, Xin; et al. (2019-12-13). "Lanthanides with Unusually Low Oxidation States in the PrB^3– and PrB^4– Boride Clusters". Inorganic Chemistry. 58 (1): 411–418. doi:10.1021/acs.inorgchem.8b02572. PMID 30543295.
↑ Jackson, M. (2000). "Magnetism of Rare Earth" (PDF). The IRM quarterly. 10 (3): 1.
↑ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.