ACTINIUM, Ac (89)

HYDROGEN TO OGANESSON

ATOMIC ARCHITECTURE

Spectrograph

Elemental Tile

Actinium from Thorium Vicanite

···

OVERVIEW

ACTINIUM

Ac (89)

ækˈtɪniəm

PHONETICS

IDENTIFICATION

Actinium is a soft, silvery-white radioactive metal which reacts rapidly with oxygen and moisture in the air forming a white coating of actinium oxide that prevents further oxidation. Found only in traces in uranium and thorium ores as the isotope 227Ac, which decays with a half-life of 21.772 years, predominantly emitting beta and sometimes alpha particles, and 228Ac, which is beta active with a half-life of 6.15 hours. One tonne of natural uranium in ore contains about 0.2 milligrams of actinium-227, and one tonne of natural thorium contains about 5 nanograms of actinium-228.

ELEMENT BRIEF

1899 by Andre-Louis Debierne, France.

DISCOVERY

Greek 'aktinos' meaning 'ray'.

ETYMOLOGY

Actinium

ELEMENT

Ac

SYMBOL

89

ATOMIC NUMBER

7440-34-8

CAS NUMBER

PHYSICAL

ELEMENTAL SPECTRUM

Silver

ELEMENTAL COLOUR

-

REFRACTIVE INDEX

-

POISSON RATIO

22.545 cm³

MOLAR VOLUME

-

BRINELL HARDNESS

-

MOHS HARDNESS

-

VICKERS HARDNESS

-

SPEED OF SOUND

-

BULK MODULUS

-

SHEAR MODULUS

-

YOUNG MODULUS

ALLOTROPES

NONE

THERMODYNAMIC

1,323.15 K, 1,050.00 °C

MELTING POINT

3,473.15 K, 3,200.00 °C

BOILING POINT

-

AUTOMATIC IGNITION

-

FLASHPOINT

-

CRITICAL TEMPERATURE

12.000'000 W/(m K)

CRITICAL PRESSURE

-

THERMAL CONDUCTIVITY

-

THERMAL EXPANSION

120.00 J/(kg K)

SPECIFIC HEAT

14.000 kJ/mol

HEAT FUSION

400.000 kJ/mol

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

227.027'752'3

ATOMIC WEIGHT

-

ATOMIC RADIUS

186 pm

COVALENT RADIUS SINGLE BOND

153 pm

COVALENT RADIUS DOUBLE BOND

140 pm

COVALENT RADIUS TRIPLE BOND

260 pm

VAN DER WAALS RADIUS

[Rn]7s²6d¹

ELECTRON CONFIGURATION

Cubic, Face-centred

CRYSTAL STRUCTURE

10.070'00 g/cm³

DENSITY AS SOLID

-

DENSITY AS LIQUID

-

DENSITY AS GAS

Fm_3m

SPACE GROUP NAME

225

SPACE GROUP NUMBER

π/2, π/2 π/2

LATTICE ANGLES

567, 567 567 pm

LATTICE CONSTANTS

REACTIVITY

3

VALENCE

1.1

ELECTRONEGATIVITY

-

ELECTRON AFFINITY

IONISATION ENERGY

ELEMENTAL DISTRIBUTION

-

UNIVERSE

-

METEORITES

-

SUN

-

EARTH CRUST

-

OCEANS

-

HUMANS

ISOTOPES

21.79 years

HALF LIFE

31.43 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	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
Isotope_089_ac_206_u	Unstable	²⁰⁶Ac	Fermion	89	p	117	n	3	1	206.014'504'980'0	u	~ 0	%	~ 0	47.230'000'000'0	MeV	7.575'000'000'0	MeV	-		-		7.92E-10	year	25.000	milli-seconds ( x⁻³ )	100.000'000	%	α	7,944.600	keV	²⁰²Fr	²⁰⁶Ac > [ 100 % , α , 7,944.6 keV ] > ²⁰²Fr	β+	8,924.000	keV	²⁰⁶Ra	²⁰⁶Ac > [ , β+ , 8,924.0 keV ] > ²⁰⁶Ra								92.748'640	%	¹⁹⁴Pt	1.274'656	%	¹⁹⁸Hg	0.360'307	%	²⁰²Hg	?	%	¹⁸⁰Hf
Isotope_089_ac_207_u	Unstable	²⁰⁷Ac	Boson	89	p	118	n	9/2	-1	207.011'949'748'0	u	~ 0	%	~ 0	13.511'303'000'0	MeV	7.667'724'000'0	MeV	-		-		9.82E-10	year	31.000	milli-seconds ( x⁻³ )	100.000'000	%	α	7,844.000	keV	²⁰³Fr	²⁰⁷Ac > [ 100 % , α , 7,844.0 keV ] > ²⁰³Fr													84.797'500	%	¹⁹⁵Pt	3.580'790	%	¹⁹⁹Hg	1.173'000	%	²⁰³Tl	?	%	¹⁹⁰Os	?	%	¹⁷⁸Hf
Isotope_089_ac_208_u	Unstable	²⁰⁸Ac	Fermion	89	p	119	n	3	1	208.011'551'551'0	u	~ 0	%	~ 0	11.131'119'000'0	MeV	7.681'172'000'0	MeV	-		-		3.07E-9	year	97.000	milli-seconds ( x⁻³ )	99.000'000	%	α	7,726.800	keV	²⁰⁴Fr	²⁰⁸Ac > [ 99 % , α , 7,726.8 keV ] > ²⁰⁴Fr	β+	8,024.100	keV	²⁰⁸Ra	²⁰⁸Ac > [ , β+ , 8,024.1 keV ] > ²⁰⁸Ra								36.949'478	%	²⁰⁰Hg	0.000'641	%	¹⁹²Pt	0.000'000	%	²⁰⁸Pb	?	%	¹⁸⁷Os	?	%	¹⁹¹Ir
Isotope_089_ac_209_u	Unstable	²⁰⁹Ac	Boson	89	p	120	n	9/2	-1	209.009'494'863'0	u	~ 0	%	~ 0	10.760'201'000'0	MeV	7.684'831'000'0	MeV	-		-		2.92E-9	year	92.000	milli-seconds ( x⁻³ )	99.000'000	%	α	7,729.200	keV	²⁰⁵Fr	²⁰⁹Ac > [ 99 % , α , 7,729.2 keV ] > ²⁰⁵Fr	β+	5,967.300	keV	²⁰⁹Ra	²⁰⁹Ac > [ , β+ , 5,967.3 keV ] > ²⁰⁹Ra								70.756'344	%	¹⁹⁷Au	28.833'371	%	²⁰¹Hg	1.400'912	%	²⁰⁵Tl	0.000'000	%	¹⁸⁸Os	?	%	¹⁹⁶Pt	?	%	¹⁸⁰Hf	?	%	¹⁷⁶Hf
Isotope_089_ac_210_u	Unstable	²¹⁰Ac	Fermion	89	p	121	n	7	1	210.009'435'986'0	u	~ 0	%	~ 0	8.844'409'000'0	MeV	7.695'847'000'0	MeV	-		-		1.11E-8	year	350.000	milli-seconds ( x⁻³ )	91.000'000	%	α	7,607.200	keV	²⁰⁶Fr	²¹⁰Ac > [ 91 % , α , 7,607.2 keV ] > ²⁰⁶Fr	β+	7,306.300	keV	²¹⁰Ra	²¹⁰Ac > [ , β+ , 7,306.3 keV ] > ²¹⁰Ra								69.577'454	%	²⁰²Hg	22.204'307	%	²⁰⁶Pb	8.908'261	%	¹⁹⁸Hg	0.000'070	%	¹⁹³Ir	0.000'000	%	¹⁸⁹Os
Isotope_089_ac_211_u	Unstable	²¹¹Ac	Boson	89	p	122	n	9/2	-1	211.007'734'835'0	u	~ 0	%	~ 0	8.789'565'000'0	MeV	7.697'896'000'0	MeV	-		-		6.75E-9	year	213.000	milli-seconds ( x⁻³ )	100.000'000	%	α	7,621.600	keV	²⁰⁷Fr	²¹¹Ac > [ 100 % , α , 7,621.6 keV ] > ²⁰⁷Fr	β+	5,346.300	keV	²¹¹Ra	²¹¹Ac > [ , β+ , 5,346.3 keV ] > ²¹¹Ra								66.993'149	%	²⁰³Tl	29.523'310	%	¹⁹⁹Hg	3.757'640	%	²⁰⁷Pb
Isotope_089_ac_212_u	Unstable	²¹²Ac	Fermion	89	p	123	n	6	1	212.007'813'822'0	u	~ 0	%	~ 0	7.204'953'000'0	MeV	7.707'176'000'0	MeV	-		-		2.92E-8	year	920.000	milli-seconds ( x⁻³ )	97.000'000	%	α	7,518.800	keV	²⁰⁸Fr	²¹²Ac > [ 97 % , α , 7,518.8 keV ] > ²⁰⁸Fr	β+	6,447.800	keV	²¹²Ra	²¹²Ac > [ , β+ , 6,447.8 keV ] > ²¹²Ra								3.921'812	%	²⁰⁰Hg	0.000'113	%	²⁰⁸Pb
Isotope_089_ac_213_u	Unstable	²¹³Ac	Boson	89	p	124	n	9/2	-1	213.006'607'643'0	u	~ 0	%	~ 0	7.278'529'000'0	MeV	7.708'546'000'0	MeV	-		-		2.20E-9	year	69.576	milli-seconds ( x⁻³ )	?	%	α	7,499.300	keV	²⁰⁹Fr	²¹³Ac > [ ? % , α , 7,499.3 keV ] > ²⁰⁹Fr	β+	4,775.100	keV	²¹³Ra	²¹³Ac > [ , β+ , 4,775.1 keV ] > ²¹³Ra								?	%	²⁰⁵Tl	?	%	²⁰¹Hg	?	%	¹⁹⁷Au
Isotope_089_ac_214_u	Unstable	²¹⁴Ac	Fermion	89	p	125	n	5	1	214.006'901'798'0	u	~ 0	%	~ 0	6.154'980'000'0	MeV	7.715'524'000'0	MeV	-		-		2.47E-8	year	780.475	milli-seconds ( x⁻³ )	89.000'000	%	α	7,350.240	keV	²¹⁰Fr	²¹⁴Ac > [ 89 % , α , 7,350.24 keV ] > ²¹⁰Fr	β+	5,306.300	keV	²¹⁴Ra	²¹⁴Ac > [ , β+ , 5,306.3 keV ] > ²¹⁴Ra								92.344'731	%	²⁰⁶Pb	5.797'770	%	²⁰²Hg	0.057'978	%	¹⁹⁸Hg
Isotope_089_ac_215_u	Unstable	²¹⁵Ac	Boson	89	p	126	n	9/2	-1	215.006'453'625'0	u	~ 0	%	~ 0	6.428'984'000'0	MeV	7.715'907'000'0	MeV	-		-		5.39E-9	year	170.000	milli-seconds ( x⁻³ )	100.000'000	%	α	7,744.280	keV	²¹¹Fr	²¹⁵Ac > [ 100 % , α , 7,744.28 keV ] > ²¹¹Fr	β+	2,455.800	keV	²¹⁵Ra	²¹⁵Ac > [ , β+ , 2,455.8 keV ] > ²¹⁵Ra								93.210'000	%	²⁰⁷Pb	6.896'511	%	²⁰³Tl	0.000'001	%	¹⁹⁹Hg
Isotope_089_ac_216_u	Unstable	²¹⁶Ac	Fermion	89	p	127	n	1	-1	216.008'720'075'0	u	~ 0	%	~ 0	6.011'514'000'0	MeV	7.719'501'000'0	MeV	-		-		1.39E-11	year	440.000	micro-seconds ( x⁻⁶ )	100.000'000	%	α	9,235.370	keV	²¹²Fr	²¹⁶Ac > [ 100 % , α , 9,235.37 keV ] > ²¹²Fr	β+	3,809.500	keV	²¹⁶Ra	²¹⁶Ac > [ , β+ , 3,809.5 keV ] > ²¹⁶Ra								0.002'225	%	²⁰⁸Pb	?	%	²⁰⁰Hg
Isotope_089_ac_217_u	Unstable	²¹⁷Ac	Boson	89	p	128	n	9/2	-1	217.009'346'914'0	u	~ 0	%	~ 0	8.122'698'000'0	MeV	7.711'356'000'0	MeV	3.825'000'000'0	nm	-		2.19E-15	year	69.000	nano-seconds ( x⁻⁹ )	98.000'000	%	α	9,831.500	keV	²¹³Fr	²¹⁷Ac > [ 98 % , α , 9,831.5 keV ] > ²¹³Fr	β+	1,797.000	keV	²¹⁷Ra	²¹⁷Ac > [ , β+ , 1,797.0 keV ] > ²¹⁷Ra								100.460'820	%	²⁰⁵Tl
Isotope_089_ac_218_u	Unstable	²¹⁸Ac	Fermion	89	p	129	n	1	-1	218.011'641'453'0	u	~ 0	%	~ 0	8.706'595'000'0	MeV	7.710'324'000'0	MeV	-		-		3.42E-14	year	1.080	micro-seconds ( x⁻⁶ )	100.000'000	%	α	9,377.400	keV	²¹⁴Fr	²¹⁸Ac > [ 100 % , α , 9,377.4 keV ] > ²¹⁴Fr													100.175'000	%	²⁰⁶Pb
Isotope_089_ac_219_u	Unstable	²¹⁹Ac	Boson	89	p	130	n	9/2	-1	219.012'420'389'0	u	~ 0	%	~ 0	10.843'944'000'0	MeV	7.702'176'000'0	MeV	-		-		3.74E-13	year	11.800	micro-seconds ( x⁻⁶ )	100.000'000	%	α	8,826.500	keV	²¹⁵Fr	²¹⁹Ac > [ 100 % , α , 8,826.5 keV ] > ²¹⁵Fr	β+	1,153.100	keV	²¹⁹Ra	²¹⁹Ac > [ , β+ , 1,153.1 keV ] > ²¹⁹Ra								100.000'001	%	²⁰⁷Pb
Isotope_089_ac_220_u	Unstable	²²⁰Ac	Fermion	89	p	131	n	3	-1	220.014'762'979'0	u	~ 0	%	~ 0	11.569'518'000'0	MeV	7.700'548'000'0	MeV	-		-		8.35E-10	year	26.360	milli-seconds ( x⁻³ )	100.000'000	%	α	8,347.800	keV	²¹⁶Fr	²²⁰Ac > [ 100 % , α , 8,347.8 keV ] > ²¹⁶Fr	β+	2,456.600	keV	²²⁰Ra	²²⁰Ac > [ , β+ , 2,456.6 keV ] > ²²⁰Ra								100.030'500	%	²⁰⁸Pb	?	%	²⁰⁰Hg
Isotope_089_ac_221_u	Unstable	²²¹Ac	Boson	89	p	132	n	9/2	-1	221.015'591'248'0	u	~ 0	%	~ 0	13.751'627'000'0	MeV	7.692'315'000'0	MeV	-		-		1.65E-9	year	52.000	milli-seconds ( x⁻³ )	100.000'000	%	α	7,783.600	keV	²¹⁷Fr	²²¹Ac > [ 100 % , α , 7,783.6 keV ] > ²¹⁷Fr													100.000'000	%	²⁰⁵Tl
Isotope_089_ac_222_u	Unstable	²²²Ac	Fermion	89	p	133	n	1	-1	222.017'843'851'0	u	~ 0	%	~ 0	14.523'155'000'0	MeV	7.690'539'000'0	MeV	-		-		1.58E-7	year	5.000	seconds ( x⁰ )	99.000'000	%	α	7,137.360	keV	²¹⁸Fr	²²²Ac > [ 99 % , α , 7,137.36 keV ] > ²¹⁸Fr	β+	1,277.960	keV	²²²Ra	²²²Ac > [ , β+ , 1,277.96 keV ] > ²²²Ra								100.000'132	%	²⁰⁶Pb	0.000'000	%	²⁰⁸Pb
Isotope_089_ac_223_u	Unstable	²²³Ac	Boson	89	p	134	n	5/2	-1	223.019'137'468'0	u	~ 0	%	~ 0	16.621'441'000'0	MeV	7.682'802'000'0	MeV	-		-		4.12E-6	year	130.020	seconds ( x⁰ )	99.000'000	%	α	6,783.200	keV	²¹⁹Fr	²²³Ac > [ 99 % , α , 6,783.2 keV ] > ²¹⁹Fr	ϵ	591.780	keV	²²³Ra	²²³Ac > [ , ϵ , 591.78 keV ] > ²²³Ra								100.276'002	%	²⁰⁷Pb	0.000'000	%	²⁰⁵Tl
Isotope_089_ac_224_u	Unstable	²²⁴Ac	Fermion	89	p	135	n	0	-1	224.021'722'866'0	u	~ 0	%	~ 0	17.826'437'000'0	MeV	7.679'141'000'0	MeV	-		-		3.17E-4	year	10.008	kilo-seconds ( x³ )	90.600'000	%	β+	385.330	keV	²²⁴Ra	²²⁴Ac > [ 90.6 % , β+ , 385.33 keV ] > ²²⁴Ra	α	6,326.900	keV	²²⁰Fr	²²⁴Ac > [ , α , 6,326.9 keV ] > ²²⁰Fr	1.600'000	%	β-	238.400	keV	²²⁴Th	²²⁴Ac > [ 1.6 % , β- , 238.4 keV ] > ²²⁴Th	101.637'464	%	²⁰⁸Pb	0.000'000	%	²⁰⁶Pb
Isotope_089_ac_225_u	Unstable	²²⁵Ac	Boson	89	p	136	n	3/2	-1	225.023'229'585'0	u	~ 0	%	~ 0	20.234'720'000'0	MeV	7.670'140'000'0	MeV	-		-		2.72E-2	year	859.680	kilo-seconds ( x³ )	100.000'000	%	α	5,935.080	keV	²²¹Fr	²²⁵Ac > [ 100 % , α , 5,935.08 keV ] > ²²¹Fr	¹⁴C	?	keV	²¹¹Bi	²²⁵Ac > [ , ¹⁴C , ? keV ] > ²¹¹Bi								100.012'800	%	²⁰⁵Tl	0.000'000	%	²⁰⁷Pb
Isotope_089_ac_226_u	Unstable	²²⁶Ac	Fermion	89	p	137	n	1	-1	226.026'098'089'0	u	~ 0	%	~ 0	21.638'220'000'0	MeV	7.665'686'000'0	MeV	-		-		3.35E-3	year	105.702	kilo-seconds ( x³ )	83.000'000	%	β-	1,113.150	keV	²²⁶Th	²²⁶Ac > [ 83 % , β- , 1,113.15 keV ] > ²²⁶Th	ϵ	641.110	keV	²²⁶Ra	²²⁶Ac > [ , ϵ , 641.11 keV ] > ²²⁶Ra	0.006'000	%	α	5,536.000	keV	²²²Fr	²²⁶Ac > [ 0.006 % , α , 5,536.0 keV ] > ²²²Fr	100.013'618	%	²⁰⁶Tl	0.000'000	%	²⁰⁵Tl	0.000'000	%	²⁰⁸Pb
Isotope_089_ac_227_u	Unstable	²²⁷Ac	Boson	89	p	138	n	3/2	-1	227.027'752'127'0	u	~ 0	%	~ 0	24.310'214'000'0	MeV	7.655'658'000'0	MeV	1.100'000'000'0	nm	-		2.18E+1	years	687.530	mega-seconds ( x⁶ )	98.620'000	%	β-	44.765	keV	²²⁷Th	²²⁷Ac > [ 98.62 % , β- , 44.765 keV ] > ²²⁷Th	α	5,042.190	keV	²²³Fr	²²⁷Ac > [ , α , 5,042.19 keV ] > ²²³Fr								100.276'314	%	²⁰⁷Pb	0.000'000	%	²⁰⁵Tl
Isotope_089_ac_228_u	Unstable	²²⁸Ac	Fermion	89	p	139	n	3	1	228.031'021'112'0	u	~ 0	%	~ 0	25.850'941'000'0	MeV	7.650'701'000'0	MeV	-		1.700'000'000'0	b	7.00E-4	year	22.100	kilo-seconds ( x³ )	100.000'000	%	β-	2,123.790	keV	²²⁸Th	²²⁸Ac > [ 100 % , β- , 2,123.79 keV ] > ²²⁸Th													100.004'000	%	²⁰⁸Pb	0.000'000	%	²⁰⁶Pb
Isotope_089_ac_229_u	Unstable	²²⁹Ac	Boson	89	p	140	n	3/2	1	229.033'015'243'0	u	~ 0	%	~ 0	28.895'981'000'0	MeV	7.639'191'000'0	MeV	-		-		1.19E-4	year	3.760	kilo-seconds ( x³ )	100.000'000	%	β-	1,167.000	keV	²²⁹Th	²²⁹Ac > [ 100 % , β- , 1,167.0 keV ] > ²²⁹Th													100.012'800	%	²⁰⁵Tl	0.000'000	%	²⁰⁷Pb
Isotope_089_ac_230_u	Unstable	²³⁰Ac	Fermion	89	p	141	n	1	1	230.036'294'178'0	u	~ 0	%	~ 0	30.753'502'000'0	MeV	7.632'966'000'0	MeV	-		-		3.87E-6	year	121.980	seconds ( x⁰ )	100.000'000	%	β-	2,944.000	keV	²³⁰Th	²³⁰Ac > [ 100 % , β- , 2,944.0 keV ] > ²³⁰Th	β-SF	?	keV	V	²³⁰Ac > [ , β-SF , ? keV ] > V								100.044'159	%	²⁰⁶Pb	0.000'002	%	²⁰⁵Tl	0.000'000	%	²⁰⁸Pb
Isotope_089_ac_231_u	Unstable	²³¹Ac	Boson	89	p	142	n	1/2	1	231.038'558'786'0	u	~ 0	%	~ 0	33.807'809'000'0	MeV	7.621'593'000'0	MeV	-		-		1.43E-5	year	450.000	seconds ( x⁰ )	100.000'000	%	β-	2,100.000	keV	²³¹Th	²³¹Ac > [ 100 % , β- , 2,100.0 keV ] > ²³¹Th													100.276'314	%	²⁰⁷Pb	0.000'000	%	²⁰⁵Tl	0.000'000	%	²⁰⁸Pb
Isotope_089_ac_232_u	Unstable	²³²Ac	Fermion	89	p	143	n	1	1	232.042'027'438'0	u	~ 0	%	~ 0	35.917'278'000'0	MeV	7.614'407'000'0	MeV	-		-		3.77E-6	year	118.980	seconds ( x⁰ )	100.000'000	%	β-	3,700.000	keV	²³²Th	²³²Ac > [ 100 % , β- , 3,700.0 keV ] > ²³²Th													100.004'000	%	²⁰⁸Pb	0.000'000	%	²⁰⁶Pb	?	%	²⁰⁰Hg
Isotope_089_ac_233_u	Unstable	²³³Ac	Boson	89	p	144	n	1/2	1	233.044'550'000'0	u	~ 0	%	~ 0	39.148'307'000'0	MeV	7.602'450'000'0	MeV	-		-		4.60E-6	year	145.020	seconds ( x⁰ )	100.000'000	%	β-	2,765.000	keV	²³³Th	²³³Ac > [ 100 % , β- , 2,765.0 keV ] > ²³³Th													100.012'800	%	²⁰⁵Tl	0.000'000	%	²⁰⁷Pb
Isotope_089_ac_234_u	Unstable	²³⁴Ac	Fermion	89	p	145	n	?	0	234.048'420'000'0	u	~ 0	%	~ 0	41.498'000'000'0	MeV	7.594'000'000'0	MeV	-		-		1.39E-6	year	43.980	seconds ( x⁰ )	100.000'000	%	β-	4,489.000	keV	²³⁴Th	²³⁴Ac > [ 100 % , β- , 4,489.0 keV ] > ²³⁴Th													100.044'159	%	²⁰⁶Pb	0.000'002	%	²⁰⁵Tl	0.000'000	%	²⁰⁸Pb
Isotope_089_ac_235_u	Unstable	²³⁵Ac	Boson	89	p	146	n	1/2	1	235.051'232'000'0	u	~ 0	%	~ 0	45.103'000'000'0	MeV	7.581'000'000'0	MeV	-		-		1.27E-6	year	40.020	seconds ( x⁰ )	?	%	β-	3,467.000	keV	²³⁵Th	²³⁵Ac > [ ? % , β- , 3,467.0 keV ] > ²³⁵Th													?	%	²⁰⁵Tl	?	%	²⁰⁸Pb	?	%	²⁰⁷Pb	?	%	¹⁸⁰Hf
Isotope_089_ac_236_u	Unstable	²³⁶Ac	Fermion	89	p	147	n	?	0	236.055'296'000'0	u	~ 0	%	~ 0	47.722'000'000'0	MeV	7.572'000'000'0	MeV	-		-		3.18E-6	year	100.200	seconds ( x⁰ )	?	%	β-	5,054.000	keV	²³⁶Th	²³⁶Ac > [ ? % , β- , 5,054.0 keV ] > ²³⁶Th													?	%	²⁰⁸Pb	?	%	²⁰⁶Pb	?	%	²⁰⁰Hg	?	%	²⁰⁶Pb

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