Padron:Infobox praseodymium

Praseodymium, ₅₉Pr
Praseodymium
Bigkas sa Ingles	/ˌpreɪziːəˈdɪmiəm/ (PRAY-zee-ə-DIM-ee)
Hitsura	grayish white
Pamantayang atomikong timbang Ar°(Pr)	140.90766±0.00001; 140.91±0.01 (pinaikli);
Praseodymium sa talahanayang peryodiko
	cerium ← praseodymium → neodymium
Atomikong bilang (Z)	59
Pangkat	n/a
Peryodo	peryodo 6
Bloke	f-bloke
Konpigurasyon ng elektron	[Xe] 4f3 6s2
Mga elektron bawat kapa	2, 8, 18, 21, 8, 2
Katangiang pisikal
Pase sa STP	solid
Punto ng pagkatunaw	1208 K (935 °C, 1715 °F)
Punto ng pagkulo	3793 K (3520 °C, 6368 °F)
Densidad (malapit sa r.t.)	6.77 g/cm3
kapag likido (sa m.p.)	6.50 g/cm3
Init ng pusyon	6.89 kJ/mol
Init ng baporisasyon	331 kJ/mol
Molar na kapasidad ng init	27.20 J/(mol·K)
Katangiang atomiko
Mga estado ng oksidasyon	0, +1, +2, +3, +4, +5 (isang katamtamang panimulang oksido)
Elektronegatibidad	Eskala ni Pauling: 1.13
Radyong atomiko	emperiko: 182 pm
Radyong Kobalente	203±7 pm
	Mga linyang espektral ng praseodymium
Ibang katangian
Kayarian ng krystal	hexagonal
Bilis ng tunog manipis na bara	2280 m/s (at 20 °C)
Termal na pagpapalawak	(r.t.) (α, poly) 6.7 µm/(m⋅K)
Termal na konduktibidad	12.5 W/(m⋅K)
Elektrikal na resistibidad	(r.t.) (α, poly); 0.700 µ Ω⋅m
Magnetikong pagsasaayos	paramagnetic
Modulo ni Young	(α form) 37.3 GPa
Modulo ng tigas	(α form) 14.8 GPa
Bultong modulo	(α form) 28.8 GPa
Rasyo ni Poisson	(α form) 0.281
Subok sa katigasan ni Vickers	400 MPa
Subok sa katigasan ni Brinell	481 MPa
Bilang ng CAS	7440-10-0
Kasaysayan
Pagkakatuklas	Carl Auer von Welsbach (1885)
Pangunahing isotopo ng praseodymium
	Kategorya: Praseodymium; tingnan; usapan; baguhin;

Pr: data m.p. cat (t)
	in	calc from C	diff	report	ref
C	935	—	—
K	1208	1208	0
F	1715	1715	0
max precision	0
WD	1208 1208
input	C: 935, K: 1208, F: 1715
comment

Pr: data b.p. cat (t)
	in	calc from C	diff	report	ref
C	3520	—	—
K	3793	3790	3	delta
F	6368	6370	-2	delta
max precision	0
WD	3403 3403
input	C: 3520, K: 3793, F: 6368
comment

↑ "praseodymium". Oxford English Dictionary (sa Ingles) (3 pat.). Oxford University Press. Setyembre 2005.
↑ "Standard Atomic Weights: Praseodymium". CIAAW. 2017.
↑ 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.
↑ M. Jackson "Magnetism of Rare Earth" The IRM quarterly col. 10, No. 3, p. 1, 2000
↑ "praseodymium". Oxford English Dictionary (sa Ingles) (3 pat.). Oxford University Press. Setyembre 2005.

[1] "praseodymium". Oxford English Dictionary (sa Ingles) (3 pat.). Oxford University Press. Setyembre 2005.

[2] "Standard Atomic Weights: Praseodymium". CIAAW. 2017.

[Cloke1993-3] 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.

[4] 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-5] M. Jackson "Magnetism of Rare Earth" The IRM quarterly col. 10, No. 3, p. 1, 2000

[6] "praseodymium". Oxford English Dictionary (sa Ingles) (3 pat.). Oxford University Press. Setyembre 2005.

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