CURIUM, Cm (96)

HYDROGEN TO OGANESSON

ATOMIC ARCHITECTURE

Spectrograph

Elemental Tile

Curium

Curium - Curious Marie Meteorite

Curium - Curious Marie Meteorite - Interesting

···

OVERVIEW

CURIUM

Cm (96)

ˈkjʊəriəm

PHONETICS

IDENTIFICATION

Curium was first intentionally produced, identified and kept secret from the public as it is produced by bombarding uranium or plutonium with neutrons in nuclear reactors – one tonne of spent nuclear fuel contains about 20 grams of curium. As a hard, dense, silvery metal with high melting and boiling point, it is paramagnetic at ambient conditions, becoming antiferromagnetic upon cooling, and other magnetic transitions that have been observed for many curium compounds.

ELEMENT BRIEF

1944 by Glenn T. Seaborg, Ralph A. James and Albert Ghiorso, USA.

DISCOVERY

From the names of Pierre and Marie Curie.

ETYMOLOGY

Curium

ELEMENT

Cm

SYMBOL

96

ATOMIC NUMBER

7440-51-9

CAS NUMBER

PHYSICAL

ELEMENTAL SPECTRUM

Silver

ELEMENTAL COLOUR

-

REFRACTIVE INDEX

-

POISSON RATIO

18.177 cm³

MOLAR VOLUME

-

BRINELL HARDNESS

-

MOHS HARDNESS

-

VICKERS HARDNESS

-

SPEED OF SOUND

-

BULK MODULUS

-

SHEAR MODULUS

-

YOUNG MODULUS

ALLOTROPES

THERMODYNAMIC

1,618.15 K, 1,345.00 °C

MELTING POINT

3,383.15 K, 3,110.00 °C

BOILING POINT

-

AUTOMATIC IGNITION

-

FLASHPOINT

-

CRITICAL TEMPERATURE

-

CRITICAL PRESSURE

10.000'000 W/(m K)

THERMAL CONDUCTIVITY

-

THERMAL EXPANSION

-

SPECIFIC HEAT

-

HEAT FUSION

-

HEAT VAPORISATION

-

HEAT COMBUSTION

-

CURIE POINT

-

NEEL POINT

-

ADIABATIC INDEX

Solid

PHASE

ELECTROMAGNETIC

-

ELECTRICAL TYPE

-

CONDUCTIVITY

-

RESISTIVITY

-

SUPERCONDUCTING POINT

-

MAGNETIC TYPE

-

MASS SUSCEPTIBILITY

-

MOLAR SUSCEPTIBILITY

-

VOLUME SUSCEPTIBILITY

STRUCTURE

Actinide

CLASSIFICATION

245.566'593'6

ATOMIC WEIGHT

-

ATOMIC RADIUS

166 pm

COVALENT RADIUS SINGLE BOND

136 pm

COVALENT RADIUS DOUBLE BOND

-

COVALENT RADIUS TRIPLE BOND

245 pm

VAN DER WAALS RADIUS

[Rn]7s²5f⁷6d¹

ELECTRON CONFIGURATION

Hexagonal, Close Packed Double

CRYSTAL STRUCTURE

13.510'00 g/cm³

DENSITY AS SOLID

-

DENSITY AS LIQUID

-

DENSITY AS GAS

p6₃/mmc

SPACE GROUP NAME

194

SPACE GROUP NUMBER

π/2, π/2 2 π/3

LATTICE ANGLES

349.6, 349.6 1133.1 pm

LATTICE CONSTANTS

REACTIVITY

4

VALENCE

1.3

ELECTRONEGATIVITY

-

ELECTRON AFFINITY

IONISATION ENERGY

ELEMENTAL DISTRIBUTION

-

UNIVERSE

-

METEORITES

-

SUN

-

EARTH CRUST

-

OCEANS

-

HUMANS

ISOTOPES

1.56 x 10⁷ Years

HALF LIFE

2.25 x 10⁷ years

LIFETIME

6d¹ = 6, 2, -2, +1/2

QUANTUM NUMBERS

-

NEUTRON CROSS SECTION

-

NEUTRON MASS ABSORPTION

STABLE ISOTOPES

NONE

UNSTABLE ISOTOPES

ISOTOPIC CHAIN

Isotope	Stability	Symbol	Type	Protons		Neutrons		Spin	Parity	Mass		Abundance		Mass Measure	Mass Excess		Binding Energy		Dipole Moment	Quadrupole Moment	Halflife in Years		Halflife in Seconds		A01 Decay Probability		A01 Decay Mode	A01 Decay Energy		A01 Decay Daughter	A01 Decay Link	A02 Decay Mode	A02 Decay Energy		A02 Decay Daughter	A02 Decay Link	A03 Decay Probability		A03 Decay Mode	A03 Decay Energy		A03 Decay Daughter	A03 Decay Link	A04 Decay Probability		A04 Decay Mode	A04 Decay Energy		Y01 Decay Product Yield		Y01 Decay Product Nuclide	Y02 Decay Product Yield		Y02 Decay Product Nuclide	Y03 Decay Product Yield		Y03 Decay Product Nuclide	Y04 Decay Product Yield		Y04 Decay Product Nuclide	Y05 Decay Product Yield		Y05 Decay Product Nuclide	Y06 Decay Product Yield		Y06 Decay Product Nuclide	Y07 Decay Product Yield		Y07 Decay Product Nuclide	Y08 Decay Product Yield		Y08 Decay Product Nuclide	Y09 Decay Product Yield		Y09 Decay Product Nuclide	Y10 Decay Product Yield		Y10 Decay Product Nuclide	Y11 Decay Product Yield		Y11 Decay Product Nuclide	Y12 Decay Product Yield		Y12 Decay Product Nuclide
Isotope_096_cm_233_u	Unstable	²³³Cm	Fermion	96	p	137	n	3/2	1	247.070'353'540'0	u	~ 0	%	~ 0	73.104'000'000'0	MeV	7.479'000'000'0	MeV	-	-	1.90E-6	year	60.000	seconds ( x⁰ )	?	%	α	7,468.500	keV	²²⁹Pu	²³³Cm > [ ? % , α , 7,468.5 keV ] > ²²⁹Pu	β+	3,098.000	keV	²³³Am	²³³Cm > [ , β+ , 3,098.0 keV ] > ²³³Am													?	%	²⁰⁵Tl	?	%	²⁰⁷Pb
Isotope_096_cm_234_u	Unstable	²³⁴Cm	Boson	96	p	138	n	0	1	234.050'159'841'0	u	~ 0	%	~ 0	47.293'098'000'0	MeV	7.546'002'000'0	MeV	-	-	1.62E-6	year	51.000	seconds ( x⁰ )	50.000'000	%	α	7,365.000	keV	²³⁰Pu	²³⁴Cm > [ 50 % , α , 7,365.0 keV ] > ²³⁰Pu	β+	1,168.000	keV	²³⁴Am	²³⁴Cm > [ , β+ , 1,168.0 keV ] > ²³⁴Am	3.000'000	%	SF	?	keV	V	²³⁴Cm > [ 3 % , SF , ? keV ] > V						47.037'843	%	²⁰⁶Pb	0.000'001	%	²⁰⁵Tl	0.000'000	%	²⁰⁸Pb
Isotope_096_cm_235_u	Unstable	²³⁵Cm	Fermion	96	p	139	n	5/2	1	235.051'434'000'0	u	~ 0	%	~ 0	46.723'592'000'0	MeV	7.550'681'000'0	MeV	-	-	9.51E-6	year	300.000	seconds ( x⁰ )	?	%	β+	2,227.000	keV	²³⁵Am	²³⁵Cm > [ ? % , β+ , 2,227.0 keV ] > ²³⁵Am	α	7,200.000	keV	²³¹Pu	²³⁵Cm > [ , α , 7,200.0 keV ] > ²³¹Pu													?	%	²⁰⁵Tl	?	%	²⁰⁸Pb	?	%	²⁰⁷Pb	?	%	¹⁸⁰Hf
Isotope_096_cm_236_u	Unstable	²³⁶Cm	Boson	96	p	140	n	0	1	236.051'413'000'0	u	~ 0	%	~ 0	47.910'000'000'0	MeV	7.548'000'000'0	MeV	-	-	1.90E-5	year	600.000	seconds ( x⁰ )	?	%	β+	686.000	keV	²³⁶Am	²³⁶Cm > [ ? % , β+ , 686.0 keV ] > ²³⁶Am	α	7,100.000	keV	²³²Pu	²³⁶Cm > [ , α , 7,100.0 keV ] > ²³²Pu													?	%	²⁰⁸Pb	?	%	²⁰⁶Pb	?	%	²⁰⁰Hg	?	%	²⁰⁶Pb
Isotope_096_cm_237_u	Unstable	²³⁷Cm	Fermion	96	p	141	n	5/2	1	237.052'901'000'0	u	~ 0	%	~ 0	47.890'000'000'0	MeV	7.550'000'000'0	MeV	-	-	3.80E-5	year	1.200	kilo-seconds ( x³ )	?	%	β+	1,684.000	keV	²³⁷Am	²³⁷Cm > [ ? % , β+ , 1,684.0 keV ] > ²³⁷Am	α	6,800.000	keV	²³³Pu	²³⁷Cm > [ , α , 6,800.0 keV ] > ²³³Pu													?	%	²⁰⁵Tl	?	%	²⁰⁷Pb
Isotope_096_cm_238_u	Unstable	²³⁸Cm	Boson	96	p	142	n	0	1	238.053'028'697'0	u	~ 0	%	~ 0	49.277'000'000'0	MeV	7.546'000'000'0	MeV	-	-	2.73E-4	year	8.604	kilo-seconds ( x³ )	90.000'000	%	ϵ	972.800	keV	²³⁸Am	²³⁸Cm > [ 90 % , ϵ , 972.8 keV ] > ²³⁸Am	α	6,621.400	keV	²³⁴Pu	²³⁸Cm > [ , α , 6,621.4 keV ] > ²³⁴Pu													100.043'985	%	²⁰⁶Pb	0.000'002	%	²⁰⁵Tl	0.000'000	%	²⁰⁸Pb
Isotope_096_cm_239_u	Unstable	²³⁹Cm	Fermion	96	p	143	n	7/2	-1	239.054'957'000'0	u	~ 0	%	~ 0	49.395'914'000'0	MeV	7.548'203'000'0	MeV	-	-	3.17E-4	year	10.008	kilo-seconds ( x³ )	100.000'000	%	β+	778.000	keV	²³⁹Am	²³⁹Cm > [ 100 % , β+ , 778.0 keV ] > ²³⁹Am	α	6,583.000	keV	²³⁵Pu	²³⁹Cm > [ , α , 6,583.0 keV ] > ²³⁵Pu													100.386'623	%	²⁰⁷Pb	0.000'000	%	²⁰⁵Tl	0.000'000	%	²⁰⁶Pb	0.000'000	%	¹⁶⁰Dy	0.000'000	%	¹⁴⁰Ce	?	%	¹⁷²Yb	?	%	¹⁷⁶Hf	?	%	¹⁵²Sm	?	%	¹⁸⁰Hf	?	%	¹⁵⁶Gd	?	%	¹⁶⁸Er	?	%	¹⁶⁴Dy
Isotope_096_cm_240_u	Unstable	²⁴⁰Cm	Boson	96	p	144	n	0	1	240.055'529'539'0	u	~ 0	%	~ 0	51.192'000'000'0	MeV	7.543'000'000'0	MeV	-	-	7.28E-2	year	2.298	mega-seconds ( x⁶ )	100.000'000	%	α	6,397.800	keV	²³⁶Pu	²⁴⁰Cm > [ 100 % , α , 6,397.8 keV ] > ²³⁶Pu	ϵ	213.600	keV	²⁴⁰Am	²⁴⁰Cm > [ , ϵ , 213.6 keV ] > ²⁴⁰Am	0.000'004	%	SF	?	keV	V	²⁴⁰Cm > [ 0.0000039 % , SF , ? keV ] > V						100.504'021	%	²⁰⁸Pb	0.000'000	%	²⁰⁶Pb	?	%	²⁰⁰Hg	0.000'000	%	²⁰⁸Pb
Isotope_096_cm_241_u	Unstable	²⁴¹Cm	Fermion	96	p	145	n	1/2	1	241.057'653'001'0	u	~ 0	%	~ 0	51.725'434'000'0	MeV	7.542'856'000'0	MeV	-	-	8.97E-2	year	2.830	mega-seconds ( x⁶ )	99.000'000	%	ϵ	767.420	keV	²⁴¹Am	²⁴¹Cm > [ 99 % , ϵ , 767.42 keV ] > ²⁴¹Am	α	6,185.200	keV	²³⁷Pu	²⁴¹Cm > [ , α , 6,185.2 keV ] > ²³⁷Pu													100.012'842	%	²⁰⁵Tl	0.000'000	%	²⁰⁷Pb
Isotope_096_cm_242_u	Unstable	²⁴²Cm	Boson	96	p	146	n	0	1	242.058'835'824'0	u	~ 0	%	~ 0	53.703'425'000'0	MeV	7.536'841'000'0	MeV	-	-	4.46E-1	year	14.070	mega-seconds ( x⁶ )	100.000'000	%	α	6,215.560	keV	²³⁸Pu	²⁴²Cm > [ 100 % , α , 6,215.56 keV ] > ²³⁸Pu	SF	?	keV	V	²⁴²Cm > [ , SF , ? keV ] > V	0.000'000	%	³⁴Si	?	keV	²⁰⁸Pb	²⁴²Cm > [ 0.000000000000011 % , ³⁴Si , ? keV ] > ²⁰⁸Pb	?	%	2β+	-1,957.570	keV	100.044'159	%	²⁰⁶Pb	0.000'002	%	²⁰⁵Tl	0.000'000	%	²⁰⁸Pb
Isotope_096_cm_243_u	Unstable	²⁴³Cm	Fermion	96	p	147	n	5/2	1	243.061'389'114'0	u	~ 0	%	~ 0	54.805'218'000'0	MeV	7.534'497'000'0	MeV	-	-	2.91E+1	years	918.642	mega-seconds ( x⁶ )	100.000'000	%	α	6,168.800	keV	²³⁹Pu	²⁴³Cm > [ 100 % , α , 6,168.8 keV ] > ²³⁹Pu	ϵ	7.480	keV	²⁴³Am	²⁴³Cm > [ , ϵ , 7.48 keV ] > ²⁴³Am	0.000'000	%	SF	?	keV	V	²⁴³Cm > [ 0.0000000053 % , SF , ? keV ] > V						100.567'115	%	²⁰⁷Pb	0.000'000	%	²⁰⁵Tl	0.000'000	%	²⁰⁶Pb	0.000'000	%	¹⁶⁰Dy	0.000'000	%	¹⁴⁰Ce	?	%	¹⁷²Yb	?	%	¹⁷⁶Hf	?	%	¹⁵²Sm	?	%	¹⁸⁰Hf	?	%	¹⁵⁶Gd	?	%	¹⁶⁸Er	?	%	¹⁶⁴Dy
Isotope_096_cm_244_u	Unstable	²⁴⁴Cm	Boson	96	p	148	n	0	1	244.062'752'578'0	u	~ 0	%	~ 0	57.183'593'000'0	MeV	7.526'918'000'0	MeV	-	-	1.81E+1	years	571.508	mega-seconds ( x⁶ )	100.000'000	%	α	5,901.740	keV	²⁴⁰Pu	²⁴⁴Cm > [ 100 % , α , 5,901.74 keV ] > ²⁴⁰Pu	SF	?	keV	V	²⁴⁴Cm > [ , SF , ? keV ] > V													100.004'000	%	²⁰⁸Pb	0.000'000	%	²⁰⁶Pb	?	%	²⁰⁰Hg	0.000'000	%	²⁰⁸Pb
Isotope_096_cm_245_u	Unstable	²⁴⁵Cm	Fermion	96	p	149	n	7/2	1	245.065'491'249'0	u	~ 0	%	~ 0	58.453'651'000'0	MeV	7.523'944'000'0	MeV	-	-	8.56E+3	years	270.133	giga-seconds ( x⁹ )	100.000'000	%	α	5,623.000	keV	²⁴¹Pu	²⁴⁵Cm > [ 100 % , α , 5,623.0 keV ] > ²⁴¹Pu	SF	?	keV	V	²⁴⁵Cm > [ , SF , ? keV ] > V													100.015'250	%	²⁰⁵Tl	0.000'000	%	²⁰⁷Pb
Isotope_096_cm_246_u	Unstable	²⁴⁶Cm	Boson	96	p	150	n	0	1	246.067'223'662'0	u	~ 0	%	~ 0	61.004'706'000'0	MeV	7.515'766'000'0	MeV	-	-	4.76E+3	years	150.214	giga-seconds ( x⁹ )	100.000'000	%	α	5,475.130	keV	²⁴²Pu	²⁴⁶Cm > [ 100 % , α , 5,475.13 keV ] > ²⁴²Pu	SF	?	keV	V	²⁴⁶Cm > [ , SF , ? keV ] > V													100.044'159	%	²⁰⁶Pb	0.000'002	%	²⁰⁵Tl	0.000'000	%	²⁰⁸Pb
Isotope_096_cm_247_u	Unstable	²⁴⁷Cm	Fermion	96	p	151	n	9/2	-1	247.070'353'540'0	u	~ 0	%	~ 0	62.618'439'000'0	MeV	7.511'465'000'0	MeV	-	-	1.56E+7	years	492.299	tera-seconds ( x¹² )	100.000'000	%	α	5,353.480	keV	²⁴³Pu	²⁴⁷Cm > [ 100 % , α , 5,353.48 keV ] > ²⁴³Pu																		100.276'314	%	²⁰⁷Pb	0.000'000	%	²⁰⁵Tl	0.000'000	%	²⁰⁶Pb	0.000'000	%	¹⁶⁰Dy	0.000'000	%	¹⁴⁰Ce	?	%	¹⁷²Yb	?	%	¹⁷⁶Hf	?	%	¹⁵²Sm	?	%	¹⁸⁰Hf	?	%	¹⁵⁶Gd	?	%	¹⁶⁸Er	?	%	¹⁶⁴Dy
Isotope_096_cm_248_u	Unstable	²⁴⁸Cm	Boson	96	p	152	n	0	1	248.072'348'508'0	u	~ 0	%	~ 0	65.533'901'000'0	MeV	7.501'928'000'0	MeV	-	-	3.49E+5	years	11.014	tera-seconds ( x¹² )	91.610'000	%	α	5,161.730	keV	²⁴⁴Pu	²⁴⁸Cm > [ 91.61 % , α , 5,161.73 keV ] > ²⁴⁴Pu	SF	?	keV	V	²⁴⁸Cm > [ , SF , ? keV ] > V	?	%	2β-	152.440	keV	²⁴⁸Cf	²⁴⁸Cm > [ ? % , 2β- , 152.44 keV ] > ²⁴⁸Cf						91.613'664	%	²⁰⁸Pb	0.000'000	%	²⁰⁶Pb	?	%	²⁰⁰Hg	0.000'000	%	²⁰⁸Pb
Isotope_096_cm_249_u	Unstable	²⁴⁹Cm	Fermion	96	p	153	n	1/2	1	249.075'953'413'0	u	~ 0	%	~ 0	67.392'202'000'0	MeV	7.496'731'000'0	MeV	-	-	1.22E-4	year	3.849	kilo-seconds ( x³ )	100.000'000	%	β-	900.530	keV	²⁴⁹Bk	²⁴⁹Cm > [ 100 % , β- , 900.53 keV ] > ²⁴⁹Bk																		100.016'701	%	²⁰⁵Tl	0.000'000	%	²⁰⁷Pb
Isotope_096_cm_250_u	Unstable	²⁵⁰Cm	Boson	96	p	154	n	0	1	250.078'356'959'0	u	~ 0	%	~ 0	70.750'150'000'0	MeV	7.485'552'000'0	MeV	-	-	8.30E+3	years	262.080	giga-seconds ( x⁹ )	74.000'000	%	SF	?	keV	V	²⁵⁰Cm > [ 74 % , SF , ? keV ] > V	α	5,168.900	keV	²⁴⁶Pu	²⁵⁰Cm > [ , α , 5,168.9 keV ] > ²⁴⁶Pu	8.000'000	%	β-	37.700	keV	²⁵⁰Bk	²⁵⁰Cm > [ 8 % , β- , 37.7 keV ] > ²⁵⁰Bk						26.011'481	%	²⁰⁶Pb	0.000'000	%	²⁰⁵Tl	0.000'000	%	²⁰⁸Pb
Isotope_096_cm_251_u	Unstable	²⁵¹Cm	Fermion	96	p	155	n	1/2	1	251.082'284'605'0	u	~ 0	%	~ 0	72.989'038'000'0	MeV	7.478'940'000'0	MeV	-	-	3.20E-5	year	1.010	kilo-seconds ( x³ )	100.000'000	%	β-	1,420.000	keV	²⁵¹Bk	²⁵¹Cm > [ 100 % , β- , 1,420.0 keV ] > ²⁵¹Bk																		100.276'314	%	²⁰⁷Pb	0.000'000	%	²⁰⁵Tl	0.000'000	%	²⁰⁶Pb	0.000'000	%	¹⁶⁰Dy	0.000'000	%	¹⁴⁰Ce	?	%	¹⁷²Yb	?	%	¹⁷⁶Hf	?	%	¹⁵²Sm	?	%	¹⁸⁰Hf	?	%	¹⁵⁶Gd	?	%	¹⁶⁸Er	?	%	¹⁶⁴Dy
Isotope_096_cm_252_u	Unstable	²⁵²Cm	Boson	96	p	156	n	0	1	252.084'870'000'0	u	~ 0	%	~ 0	76.647'617'000'0	MeV	7.466'724'000'0	MeV	-	-	2.85E-3	year	89.856	kilo-seconds ( x³ )	?	%	β-	522.000	keV	²⁵²Bk	²⁵²Cm > [ ? % , β- , 522.0 keV ] > ²⁵²Bk																		?	%	²⁰⁸Pb	?	%	²⁰⁶Pb	?	%	²⁰⁰Hg	0.000'000	%	²⁰⁸Pb

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