STRONTIUM, Sr (38)

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ATOMIC ARCHITECTURE

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Elemental Tile

Strontium from Celestine

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OVERVIEW

STRONTIUM

Sr (38)

ˈstrɒntiəm

PHONETICS

IDENTIFICATION

Strontium is a soft silver-white or yellowish metallic element that is highly reactive chemically. The metal turns yellow when it is exposed to air and has physical and chemical properties similar to those of its two neighbours, calcium and barium. It occurs naturally in the minerals celestine, putnisite and strontianite.

ELEMENT BRIEF

1790 by Adair Crawford, Scotland.

DISCOVERY

Named after Scottish town Strontian.

ETYMOLOGY

Strontium

ELEMENT

Sr

SYMBOL

38

ATOMIC NUMBER

7440-24-6

CAS NUMBER

PHYSICAL

ELEMENTAL SPECTRUM

Silver

ELEMENTAL COLOUR

-

REFRACTIVE INDEX

0.280

POISSON RATIO

33.314 cm³

MOLAR VOLUME

-

BRINELL HARDNESS

1.50

MOHS HARDNESS

-

VICKERS HARDNESS

-

SPEED OF SOUND

-

BULK MODULUS

6.10G Pa, 60.202'3k Atm

SHEAR MODULUS

-

YOUNG MODULUS

ALLOTROPES

THERMODYNAMIC

1,050.15 K, 777.00 °C

MELTING POINT

1,655.15 K, 1,382.00 °C

BOILING POINT

-

AUTOMATIC IGNITION

-

FLASHPOINT

-

CRITICAL TEMPERATURE

-

CRITICAL PRESSURE

35.000'000 W/(m K)

THERMAL CONDUCTIVITY

0.000'022'5 K¯¹

THERMAL EXPANSION

300.00 J/(kg K)

SPECIFIC HEAT

8.000 kJ/mol

HEAT FUSION

137.000 kJ/mol

HEAT VAPORISATION

-

HEAT COMBUSTION

-

CURIE POINT

-

NEEL POINT

-

ADIABATIC INDEX

Solid

PHASE

ELECTROMAGNETIC

Conductor

ELECTRICAL TYPE

7.70M S/m

CONDUCTIVITY

130.00n Ω.m

RESISTIVITY

-

SUPERCONDUCTING POINT

Paramagnetic

MAGNETIC TYPE

-0.000'000'002'5

MASS SUSCEPTIBILITY

-0.000'000'000'219'00

MOLAR SUSCEPTIBILITY

-0.000'006'580'00

VOLUME SUSCEPTIBILITY

STRUCTURE

Alkaline Earth

CLASSIFICATION

87.616'644'1

ATOMIC WEIGHT

219 pm

ATOMIC RADIUS

185 pm

COVALENT RADIUS SINGLE BOND

157 pm

COVALENT RADIUS DOUBLE BOND

139 pm

COVALENT RADIUS TRIPLE BOND

249 pm

VAN DER WAALS RADIUS

[Kr]5s²

ELECTRON CONFIGURATION

Cubic, Face-centred

CRYSTAL STRUCTURE

2.630'00 g/cm³

DENSITY AS SOLID

6.980'00 g/cm³

DENSITY AS LIQUID

-

DENSITY AS GAS

Fm_3m

SPACE GROUP NAME

225

SPACE GROUP NUMBER

π/2, π/2 π/2

LATTICE ANGLES

608.49, 608.49 608.49 pm

LATTICE CONSTANTS

REACTIVITY

2

VALENCE

0.95

ELECTRONEGATIVITY

5.02 kJ/mol

ELECTRON AFFINITY

IONISATION ENERGY

ELEMENTAL DISTRIBUTION

0.000'003 %

UNIVERSE

0.000'87 %

METEORITES

0.000'005 %

SUN

0.036 %

EARTH CRUST

0.000'41 %

OCEANS

0.000'46 %

HUMANS

ISOTOPES

Stable

HALF LIFE

Stable

LIFETIME

5s² = 5, 0, 0, -1/2

QUANTUM NUMBERS

6.250'00 b σ_s

NEUTRON CROSS SECTION

1.280'00 b σ_a

NEUTRON MASS ABSORPTION

STABLE ISOTOPES

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	Y01 Decay Product Yield		Y01 Decay Product Nuclide	Y02 Decay Product Yield		Y02 Decay Product Nuclide	Y03 Decay Product Yield		Y03 Decay Product Nuclide
Isotope_038_sr_73_u	Unstable	⁷³Sr	Fermion	38	p	35	n	1/2	-1	72.965'970'000'0	u	~ 0	%	~ 0	-31.699'000'000'0	MeV	8.098'8.098'8.098'8.098	MeV	-		-		7.92E-10	year	25.000	milli-seconds ( x⁻³ )	100.000'000	%	β+	13,331.000	keV	⁷³Rb	⁷³Sr > [ 100 % , β+ , 13,331.0 keV ] > ⁷³Rb	β+p	?	keV	⁷²Kr	⁷³Sr > [ , β+p , ? keV ] > ⁷²Kr	?	%	⁷²Ge
Isotope_038_sr_74_u	Unstable	⁷⁴Sr	Boson	38	p	36	n	0	1	73.956'310'000'0	u	~ 0	%	~ 0	-40.697'000'000'0	MeV	8.220'000'000'0	MeV	-		-		1.58E-9	year	50.000	milli-seconds ( x⁻³ )	?	%	β+	10,198.000	keV	⁷⁴Rb	⁷⁴Sr > [ ? % , β+ , 10,198.0 keV ] > ⁷⁴Rb						?	%	⁷⁴Ge
Isotope_038_sr_75_u	Unstable	⁷⁵Sr	Fermion	38	p	37	n	3/2	-1	74.949'949'568'0	u	~ 0	%	~ 0	-46.621'677'000'0	MeV	8.296'551'000'0	MeV	-		-		2.79E-9	year	88.000	milli-seconds ( x⁻³ )	95.000'000	%	β+	9,578.000	keV	⁷⁵Rb	⁷⁵Sr > [ 95 % , β+ , 9,578.0 keV ] > ⁷⁵Rb	β+p	?	keV	⁷⁴Kr	⁷⁵Sr > [ , β+p , ? keV ] > ⁷⁴Kr	95.000'000	%	⁷⁵As	?	%	⁷⁴Ge
Isotope_038_sr_76_u	Unstable	⁷⁶Sr	Boson	38	p	38	n	0	1	75.941'766'782'0	u	~ 0	%	~ 0	-54.243'893'000'0	MeV	8.393'879'000'0	MeV	-		-		2.82E-7	year	8.900	seconds ( x⁰ )	100.000'000	%	β+	5,213.700	keV	⁷⁶Rb	⁷⁶Sr > [ 100 % , β+ , 5,213.7 keV ] > ⁷⁶Rb						100.000'000	%	⁷⁶Se	0.000'000	%	⁷²Ge
Isotope_038_sr_77_u	Unstable	⁷⁷Sr	Fermion	38	p	39	n	5/2	1	76.937'944'782'0	u	~ 0	%	~ 0	-57.804'063'000'0	MeV	8.435'926'000'0	MeV	-		-		2.85E-7	year	9.000	seconds ( x⁰ )	100.000'000	%	β+	5,998.300	keV	⁷⁷Rb	⁷⁷Sr > [ 100 % , β+ , 5,998.3 keV ] > ⁷⁷Rb	β+p	?	keV	⁷⁶Kr	⁷⁷Sr > [ , β+p , ? keV ] > ⁷⁶Kr	100.000'000	%	⁷⁷Se	0.250'000	%	⁷⁶Se
Isotope_038_sr_78_u	Unstable	⁷⁸Sr	Boson	38	p	40	n	0	1	77.932'180'000'0	u	~ 0	%	~ 0	-63.173'924'000'0	MeV	8.500'096'000'0	MeV	-		-		5.04E-6	year	159.000	seconds ( x⁰ )	100.000'000	%	β+	2,740.100	keV	⁷⁸Rb	⁷⁸Sr > [ 100 % , β+ , 2,740.1 keV ] > ⁷⁸Rb						?	%	⁷⁸Se
Isotope_038_sr_79_u	Unstable	⁷⁹Sr	Fermion	38	p	41	n	3/2	-1	78.929'708'000'0	u	~ 0	%	~ 0	-65.476'577'000'0	MeV	8.523'816'000'0	MeV	-0.474'000'000'0	nm	0.740'000'000'0	b	4.28E-6	year	135.000	seconds ( x⁰ )	100.000'000	%	β+	4,304.600	keV	⁷⁹Rb	⁷⁹Sr > [ 100 % , β+ , 4,304.6 keV ] > ⁷⁹Rb						100.000'000	%	⁷⁹Br
Isotope_038_sr_80_u	Unstable	⁸⁰Sr	Boson	38	p	42	n	0	1	79.924'521'013'0	u	~ 0	%	~ 0	-70.308'223'000'0	MeV	8.578'555'000'0	MeV	-		-		2.02E-4	year	6.378	kilo-seconds ( x³ )	100.000'000	%	β+	842.430	keV	⁸⁰Rb	⁸⁰Sr > [ 100 % , β+ , 842.43 keV ] > ⁸⁰Rb						100.000'000	%	⁸⁰Kr
Isotope_038_sr_81_u	Unstable	⁸¹Sr	Fermion	38	p	43	n	1/2	-1	80.923'211'846'0	u	~ 0	%	~ 0	-71.527'705'000'0	MeV	8.587'348'000'0	MeV	0.544'000'000'0	nm	-		4.25E-5	year	1.340	kilo-seconds ( x³ )	100.000'000	%	β+	2,904.920	keV	⁸¹Rb	⁸¹Sr > [ 100 % , β+ , 2,904.92 keV ] > ⁸¹Rb						100.000'000	%	⁸¹Br
Isotope_038_sr_82_u	Unstable	⁸²Sr	Boson	38	p	44	n	0	1	81.918'401'639'0	u	~ 0	%	~ 0	-76.008'384'000'0	MeV	8.635'698'000'0	MeV	-		-		6.94E-2	year	2.191	mega-seconds ( x⁶ )	100.000'000	%	ϵ	179.820	keV	⁸²Rb	⁸²Sr > [ 100 % , ϵ , 179.82 keV ] > ⁸²Rb						100.000'000	%	⁸²Kr
Isotope_038_sr_83_u	Unstable	⁸³Sr	Fermion	38	p	45	n	7/2	1	82.917'556'701'0	u	~ 0	%	~ 0	-76.795'439'000'0	MeV	8.638'381'000'0	MeV	-0.829'800'000'0	nm	0.823'000'000'0	b	3.70E-3	year	116.700	kilo-seconds ( x³ )	100.000'000	%	β+	1,257.170	keV	⁸³Rb	⁸³Sr > [ 100 % , β+ , 1,257.17 keV ] > ⁸³Rb						100.000'000	%	⁸³Kr
Isotope_038_sr_84_s	Stable	⁸⁴Sr	Boson	38	p	46	n	0	1	83.913'425'275'0	u	0.560'000	%	0.469'915'181'5	-80.643'837'000'0	MeV	8.677'444'000'0	MeV	-		-		-				?	%	2β+	-257.250	keV	⁸⁴Kr	⁸⁴Sr > [ ? % , 2β+ , -257.25 keV ] > ⁸⁴Kr						?	%	⁸⁴Kr
Isotope_038_sr_85_u	Unstable	⁸⁵Sr	Fermion	38	p	47	n	9/2	1	84.912'932'803'0	u	~ 0	%	~ 0	-81.102'572'000'0	MeV	8.675'710'000'0	MeV	-1.000'500'000'0	nm	0.323'000'000'0	b	1.78E-1	year	5.603	mega-seconds ( x⁶ )	100.000'000	%	ϵ	1,064.760	keV	⁸⁵Rb	⁸⁵Sr > [ 100 % , ϵ , 1,064.76 keV ] > ⁸⁵Rb						100.000'000	%	⁸⁵Rb
Isotope_038_sr_86_s	Stable	⁸⁶Sr	Boson	38	p	48	n	0	1	85.909'260'204'0	u	9.860'000	%	8.470'653'056'1	-84.523'576'000'0	MeV	8.708'461'000'0	MeV	-		-		-
Isotope_038_sr_87_s	Stable	⁸⁷Sr	Fermion	38	p	49	n	9/2	1	86.908'877'124'0	u	7.000'000	%	6.083'621'398'7	-84.880'413'000'0	MeV	8.705'239'000'0	MeV	-1.093'603'000'0	nm	0.335'000'000'0	b	-
Isotope_038_sr_88_s	Stable	⁸⁸Sr	Boson	38	p	50	n	0	1	87.905'612'124'0	u	82.580'000	%	72.592'454'492'0	-87.921'740'000'0	MeV	8.732'596'000'0	MeV	-		-		-
Isotope_038_sr_89_u	Unstable	⁸⁹Sr	Fermion	38	p	51	n	5/2	1	88.907'450'675'0	u	~ 0	%	~ 0	-86.209'141'000'0	MeV	8.705'924'000'0	MeV	-1.148'800'000'0	nm	-0.274'000'000'0	b	1.44E-1	year	4.539	mega-seconds ( x⁶ )	100.000'000	%	β-	1,492.620	keV	⁸⁹Y	⁸⁹Sr > [ 100 % , β- , 1,492.62 keV ] > ⁸⁹Y						100.000'000	%	⁸⁹Y
Isotope_038_sr_90_u	Unstable	⁹⁰Sr	Boson	38	p	52	n	0	1	89.907'737'888'0	u	~ 0	%	~ 0	-85.941'604'000'0	MeV	8.695'900'000'0	MeV	-		-		2.88E+1	years	909.111	mega-seconds ( x⁶ )	100.000'000	%	β-	545.860	keV	⁹⁰Y	⁹⁰Sr > [ 100 % , β- , 545.86 keV ] > ⁹⁰Y						100.000'000	%	⁹⁰Zr
Isotope_038_sr_91_u	Unstable	⁹¹Sr	Fermion	38	p	53	n	5/2	1	90.910'203'095'0	u	~ 0	%	~ 0	-83.645'279'000'0	MeV	8.663'802'000'0	MeV	-0.886'800'000'0	nm	0.044'000'000'0	b	1.10E-3	year	34.700	kilo-seconds ( x³ )	100.000'000	%	β-	2,699.750	keV	⁹¹Y	⁹¹Sr > [ 100 % , β- , 2,699.75 keV ] > ⁹¹Y						100.000'000	%	⁹¹Zr
Isotope_038_sr_92_u	Unstable	⁹²Sr	Boson	38	p	54	n	0	1	91.911'037'858'0	u	~ 0	%	~ 0	-82.867'702'000'0	MeV	8.648'910'000'0	MeV	-		-		3.04E-4	year	9.580	kilo-seconds ( x³ )	100.000'000	%	β-	1,945.630	keV	⁹²Y	⁹²Sr > [ 100 % , β- , 1,945.63 keV ] > ⁹²Y						100.000'000	%	⁹²Zr
Isotope_038_sr_93_u	Unstable	⁹³Sr	Fermion	38	p	55	n	5/2	1	92.914'025'634'0	u	~ 0	%	~ 0	-80.084'606'000'0	MeV	8.612'773'000'0	MeV	-0.794'200'000'0	nm	0.265'000'000'0	b	1.41E-5	year	445.398	seconds ( x⁰ )	100.000'000	%	β-	4,138.600	keV	⁹³Y	⁹³Sr > [ 100 % , β- , 4,138.6 keV ] > ⁹³Y						100.000'000	%	⁹³Nb
Isotope_038_sr_94_u	Unstable	⁹⁴Sr	Boson	38	p	56	n	0	1	93.915'361'312'0	u	~ 0	%	~ 0	-78.840'430'000'0	MeV	8.593'777'000'0	MeV	-		-		2.39E-6	year	75.300	seconds ( x⁰ )	100.000'000	%	β-	3,508.070	keV	⁹⁴Y	⁹⁴Sr > [ 100 % , β- , 3,508.07 keV ] > ⁹⁴Y						?	%	⁹⁴Mo
Isotope_038_sr_95_u	Unstable	⁹⁵Sr	Fermion	38	p	57	n	1/2	1	94.919'358'766'0	u	~ 0	%	~ 0	-75.116'826'000'0	MeV	8.549'082'000'0	MeV	-0.537'000'000'0	nm	-		7.57E-7	year	23.900	seconds ( x⁰ )	100.000'000	%	β-	6,090.240	keV	⁹⁵Y	⁹⁵Sr > [ 100 % , β- , 6,090.24 keV ] > ⁹⁵Y						100.000'000	%	⁹⁵Mo
Isotope_038_sr_96_u	Unstable	⁹⁶Sr	Boson	38	p	58	n	0	1	95.921'696'802'0	u	~ 0	%	~ 0	-72.938'959'000'0	MeV	8.521'419'000'0	MeV	-		-		3.39E-8	year	1.070	seconds ( x⁰ )	100.000'000	%	β-	5,407.800	keV	⁹⁶Y	⁹⁶Sr > [ 100 % , β- , 5,407.8 keV ] > ⁹⁶Y						100.000'000	%	⁹⁶Mo
Isotope_038_sr_97_u	Unstable	⁹⁷Sr	Fermion	38	p	59	n	1/2	1	96.926'152'923'0	u	~ 0	%	~ 0	-68.788'109'000'0	MeV	8.473'987'000'0	MeV	-0.498'300'000'0	nm	-		1.36E-8	year	429.000	milli-seconds ( x⁻³ )	100.000'000	%	β-	7,469.600	keV	⁹⁷Y	⁹⁷Sr > [ 100 % , β- , 7,469.6 keV ] > ⁹⁷Y	β-n	1,487.300	keV	⁹⁶Y	⁹⁷Sr > [ , β-n , 1,487.3 keV ] > ⁹⁶Y	100.000'000	%	⁹⁷Mo	0.108'000	%	⁹⁶Mo
Isotope_038_sr_98_u	Unstable	⁹⁸Sr	Boson	38	p	60	n	0	1	97.928'452'934'0	u	~ 0	%	~ 0	-66.645'662'000'0	MeV	8.448'016'000'0	MeV	-		-		2.07E-8	year	653.000	milli-seconds ( x⁻³ )	100.000'000	%	β-	5,821.760	keV	⁹⁸Y	⁹⁸Sr > [ 100 % , β- , 5,821.76 keV ] > ⁹⁸Y	β-n	1,540.700	keV	⁹⁷Y	⁹⁸Sr > [ , β-n , 1,540.7 keV ] > ⁹⁷Y	0.581'000	%	⁹⁷Mo	0.000'145	%	⁹⁶Mo	?	%	⁹⁸Ru
Isotope_038_sr_99_u	Unstable	⁹⁹Sr	Fermion	38	p	61	n	3/2	1	98.933'240'926'0	u	~ 0	%	~ 0	-62.185'677'000'0	MeV	8.399'161'000'0	MeV	-0.261'000'000'0	nm	0.840'000'000'0	b	8.52E-9	year	269.000	milli-seconds ( x⁻³ )	100.000'000	%	β-	8,015.200	keV	⁹⁹Y	⁹⁹Sr > [ 100 % , β- , 8,015.2 keV ] > ⁹⁹Y	β-n	2,210.400	keV	⁹⁸Y	⁹⁹Sr > [ , β-n , 2,210.4 keV ] > ⁹⁸Y	98.000'000	%	⁹⁹Ru	0.000'331	%	⁹⁷Ru	?	%	⁹⁸Ru
Isotope_038_sr_100_u	Unstable	¹⁰⁰Sr	Boson	38	p	62	n	0	1	99.935'351'911'0	u	~ 0	%	~ 0	-60.219'307'000'0	MeV	8.376'218'000'0	MeV	-		-		6.40E-9	year	202.000	milli-seconds ( x⁻³ )	99.000'000	%	β-	7,075.000	keV	¹⁰⁰Y	¹⁰⁰Sr > [ 99 % , β- , 7,075.0 keV ] > ¹⁰⁰Y	β-n	1,910.000	keV	⁹⁹Y	¹⁰⁰Sr > [ , β-n , 1,910.0 keV ] > ⁹⁹Y	98.010'000	%	¹⁰⁰Ru	1.675'200	%	⁹⁹Ru	?	%	⁹⁸Ru
Isotope_038_sr_101_u	Unstable	¹⁰¹Sr	Fermion	38	p	63	n	5/2	-1	100.940'517'888'0	u	~ 0	%	~ 0	-55.407'231'000'0	MeV	8.325'555'000'0	MeV	-		-		3.74E-9	year	118.000	milli-seconds ( x⁻³ )	98.000'000	%	β-	9,505.000	keV	¹⁰¹Y	¹⁰¹Sr > [ 98 % , β- , 9,505.0 keV ] > ¹⁰¹Y	β-n	3,816.000	keV	¹⁰⁰Y	¹⁰¹Sr > [ , β-n , 3,816.0 keV ] > ¹⁰⁰Y	96.040'000	%	¹⁰¹Ru	4.247'500	%	¹⁰⁰Ru	0.021'804	%	⁹⁹Ru
Isotope_038_sr_102_u	Unstable	¹⁰²Sr	Boson	38	p	64	n	0	1	101.943'018'987'0	u	~ 0	%	~ 0	-53.077'471'000'0	MeV	8.300'8.300'8.300'8.300	MeV	-		-		2.19E-9	year	69.000	milli-seconds ( x⁻³ )	94.000'000	%	β-	8,815.000	keV	¹⁰²Y	¹⁰²Sr > [ 94 % , β- , 8,815.0 keV ] > ¹⁰²Y	β-n	3,763.000	keV	¹⁰¹Y	¹⁰²Sr > [ , β-n , 3,763.0 keV ] > ¹⁰¹Y	89.300'000	%	¹⁰²Ru	9.996'000	%	¹⁰¹Ru	0.106'700	%	¹⁰⁰Ru
Isotope_038_sr_103_u	Unstable	¹⁰³Sr	Fermion	38	p	65	n	?	0	102.948'950'000'0	u	~ 0	%	~ 0	-47.553'000'000'0	MeV	8.244'000'000'0	MeV	-		-		1.58E-9	year	50.000	milli-seconds ( x⁻³ )	?	%	β-	11,383.000	keV	¹⁰³Y	¹⁰³Sr > [ ? % , β- , 11,383.0 keV ] > ¹⁰³Y						?	%	¹⁰²Ru	?	%	¹⁰³Rh
Isotope_038_sr_104_u	Unstable	¹⁰⁴Sr	Boson	38	p	66	n	0	1	103.952'330'000'0	u	~ 0	%	~ 0	-44.404'000'000'0	MeV	8.212'000'000'0	MeV	-		-		9.51E-10	year	30.000	milli-seconds ( x⁻³ )	?	%	β-	10,507.000	keV	¹⁰⁴Y	¹⁰⁴Sr > [ ? % , β- , 10,507.0 keV ] > ¹⁰⁴Y						?	%	¹⁰³Rh	?	%	¹⁰⁴Pd
Isotope_038_sr_105_u	Unstable	¹⁰⁵Sr	Fermion	38	p	67	n	?	0	104.958'580'000'0	u	~ 0	%	~ 0	-38.582'000'000'0	MeV	8.156'000'000'0	MeV	-		-		6.34E-10	year	20.000	milli-seconds ( x⁻³ )	?	%	β-	12,771.000	keV	¹⁰⁵Y	¹⁰⁵Sr > [ ? % , β- , 12,771.0 keV ] > ¹⁰⁵Y						?	%	¹⁰³Rh	?	%	¹⁰⁵Pd	?	%	¹⁰⁴Pd

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