Zerconyum (Zr)

chemical element with symbol Zr and atomic number 40

Atomic Number	40
Atomic Weight	91.224
mass number	90

Group	4
Period	5
Block	d

proton	40 p⁺
neutron	50 n⁰
electron	40 e^-

Physical Property

Atomic Radius	155 pm 269 pm
molar volume	14.1 cm³/mol
covalent radius	154 pm 127 pm 121 pm 175 pm
Metallic Radius	145 pm 160 pm
ionic radius	59 pm 66 pm 72 pm 78 pm 84 pm 89 pm
Crystal Radius	73 pm 80 pm 86 pm 92 pm 98 pm 103 pm
Van der Waals radius	230 pm 223 pm 254 pm 312.4 pm
dosedh	6.52 g/cm³ 5,800 kg/m³

Chemical Property

nerth

proton affinity
electron affinity	0.426 eV/particle
ionization energy	6.6339 eV/particle 13.13 eV/particle 23.17 eV/particle 34.41836 eV/particle 80.348 eV/particle 96.27 eV/particle 112 eV/particle 133.7 eV/particle 153 eV/particle 172.02 eV/particle 214.9 eV/particle 236.25 eV/particle 426 eV/particle 470 eV/particle 520 eV/particle 573 eV/particle 622 eV/particle 690 eV/particle 745 eV/particle 803 eV/particle 863 eV/particle 922 eV/particle 1,092 eV/particle 1,144.7 eV/particle 1,205.4 eV/particle 1,277 eV/particle 1,344 eV/particle 1,392 eV/particle 1,525.1 eV/particle 1,582.371 eV/particle 3,788 eV/particle 3,950 eV/particle 4,127 eV/particle 4,300 eV/particle 4,553 eV/particle 4,744 eV/particle 4,991 eV/particle 5,146.935 eV/particle 21,516.469 eV/particle 22,236.68 eV/particle

enthalpy of vaporization	567 kJ/mol
enthalpy of fusion	19.2 kJ/mol
standard enthalpy of formation	610 kJ/mol
electron

electron shell	2, 8, 18, 10, 2

valence electron	2 ⓘ

aray an elektrons	[Kr] 4d² 5s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 4d² 5s²

oxidation number	-2, 0, 1, 2, 3, 4
electronegativity	7.808 eV/particle 0.1248887 1.33
Electrophilicity Index	1.0036040369931862 eV/particle
fundamental state of matter

phase of matter	Solid
gaseous state of matter
Boiling Point	4,679.15 K
Melting Point	2,127.15 K
critical pressure
critical temperature
triple point
appearance
liw	Silver #ff1493 #94e0e0 #94e0e0
appearance	silvery white
refractive index
thermodynamic material property
Thermal Conductivity	22.7 W/(m K)
thermal expansion	0.0000057 1/K
molar heat capacity	25.36 J/(mol K)
Specific Heat Capacity	0.278 J/(g⋅K)
heat capacity ratio
electrical properties
type	Conductor
electrical conductivity	2.4 MS/m
electrical resistivity	0.00000042 Ω*m
superconductivity	0.61 K
magnetism
type	paramagnetic
magnetic susceptibility (Mass)	0.0000000168 m³/Kg
magnetic susceptibility (Molar)	0.00000000153 m³/mol
magnetic susceptibility (Volume)	0.000109
magnetic ordering
Curie temperature
Néel temperature
kesweyth
Crystal Structure	Simple Hexagonal (HEX)
lattice constant	3.23 Å
Lattice Angles	π/2, π/2, 2 π/3
mechanical property
hardness	650 MPa 5 MPa 903 MPa
bulk modulus
shear modulus	33 GPa
Young's modulus	68 GPa
Poisson's ratio	0.34
speed of sound	3,800 m/s
classification
Category	Transition metals, Transition metals
CAS Group	IVA
IUPAC Group	IVB
Glawe Number	49
Mendeleev Number	44
Pettifor Number	49
Geochemical Class	high field strength
Goldschmidt classification	litophile

other

Gas Basicity
polarizability	112 ± 13 a₀
C6 Dispersion Coefficient	1,360 a₀
allotrope
Neutron cross section	0.184
Neutron Mass Absorption	0.00066
quantum number	3F2
space group	194 (P63/mmc)

Isotopes of Zirconium

Stable Isotopes	3
Unstable Isotopes	34
Natural Isotopes	5

⁷⁷Zr

mass number	77
neutron number	37
relative atomic mass	76.966076 ± 0.000429 Da
g-factor
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life
spin	3/2
nuclear quadrupole moment
dydhyas diskudhans	2017
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
β⁺ p (β⁺-delayed proton emission)
p (proton emission)

⁷⁸Zr

mass number	78
neutron number	38
relative atomic mass	77.956146 ± 0.000429 Da
g-factor	0
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life
spin	0
nuclear quadrupole moment	0
dydhyas diskudhans	2001
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
β⁺ p (β⁺-delayed proton emission)

⁷⁹Zr

mass number	79
neutron number	39
relative atomic mass	78.94979 ± 0.000322 Da
g-factor
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	56 ± 30 ms
spin	5/2
nuclear quadrupole moment
dydhyas diskudhans	1999
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)

⁸⁰Zr

mass number	80
neutron number	40
relative atomic mass	79.941213 ± 0.000322 Da
g-factor	0
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	4.6 ± 0.6 s
spin	0
nuclear quadrupole moment	0
dydhyas diskudhans	1987
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁸¹Zr

mass number	81
neutron number	41
relative atomic mass	80.938245 ± 0.000099 Da
g-factor
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	5.5 ± 0.4 s
spin	3/2
nuclear quadrupole moment
dydhyas diskudhans	1997
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	0.12%

⁸²Zr

mass number	82
neutron number	42
relative atomic mass	81.931707497 ± 0.0000017 Da
g-factor	0
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	32 ± 5 s
spin	0
nuclear quadrupole moment	0
dydhyas diskudhans	1982
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁸³Zr

mass number	83
neutron number	43
relative atomic mass	82.929240926 ± 0.000006902 Da
g-factor
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	42 ± 2 s
spin	1/2
nuclear quadrupole moment	0
dydhyas diskudhans	1974
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)

⁸⁴Zr

mass number	84
neutron number	44
relative atomic mass	83.923325663 ± 0.000005903 Da
g-factor	0
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	25.8 ± 0.5 m
spin	0
nuclear quadrupole moment	0
dydhyas diskudhans	1977
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁸⁵Zr

mass number	85
neutron number	45
relative atomic mass	84.921443199 ± 0.000006902 Da
g-factor
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	7.86 ± 0.04 m
spin	7/2
nuclear quadrupole moment
dydhyas diskudhans	1963
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁸⁶Zr

mass number	86
neutron number	46
relative atomic mass	85.916296814 ± 0.000003827 Da
g-factor	0
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	16.5 ± 0.1 h
spin	0
nuclear quadrupole moment	0
dydhyas diskudhans	1951
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁸⁷Zr

mass number	87
neutron number	47
relative atomic mass	86.914817338 ± 0.00000445 Da
g-factor	-0.19866666666667 ± 0.0011111111111111
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	1.68 ± 0.01 h
spin	9/2
nuclear quadrupole moment	0.42 ± 0.05
dydhyas diskudhans	1948
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁸⁸Zr

mass number	88
neutron number	48
relative atomic mass	87.910220715 ± 0.0000058 Da
g-factor	0
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	83.4 ± 0.3 d
spin	0
nuclear quadrupole moment	0
dydhyas diskudhans	1951
parity	+

decay mode	intensity
ϵ (electron capture)	100%

⁸⁹Zr

mass number	89
neutron number	49
relative atomic mass	88.908879751 ± 0.000002983 Da
g-factor	-0.23222222222222 ± 0.0013333333333333
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	78.36 ± 0.023 h
spin	9/2
nuclear quadrupole moment	0.28 ± 0.1
dydhyas diskudhans	1948
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁹⁰Zr

mass number	90
neutron number	50
relative atomic mass	89.904698755 ± 0.000000126 Da
g-factor	0
natural abundance	51.45 ± 0.04
radioactivity	stable isotope
half-life	Not Radioactive ☢️
spin	0
nuclear quadrupole moment	0
dydhyas diskudhans	1924
parity	+

⁹¹Zr

mass number	91
neutron number	51
relative atomic mass	90.905640205 ± 0.000000101 Da
g-factor
natural abundance	11.22 ± 0.05
radioactivity	stable isotope
half-life	Not Radioactive ☢️
spin	5/2
nuclear quadrupole moment	-0.176 ± 0.003
dydhyas diskudhans	1934
parity	+

⁹²Zr

mass number	92
neutron number	52
relative atomic mass	91.905035336 ± 0.000000101 Da
g-factor	0
natural abundance	17.15 ± 0.03
radioactivity	stable isotope
half-life	Not Radioactive ☢️
spin	0
nuclear quadrupole moment	0
dydhyas diskudhans	1924
parity	+

⁹³Zr

mass number	93
neutron number	53
relative atomic mass	92.906470661 ± 0.000000489 Da
g-factor
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	1.61 ± 0.05 My
spin	5/2
nuclear quadrupole moment
dydhyas diskudhans	1950
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

⁹⁴Zr

mass number	94
neutron number	54
relative atomic mass	93.906312523 ± 0.000000175 Da
g-factor	0
natural abundance	17.38 ± 0.04
radioactivity	☢️ elven radyoweythresek
half-life
spin	0
nuclear quadrupole moment	0
dydhyas diskudhans	1924
parity	+

decay mode	intensity
2β⁻ (double β⁻ decay)

⁹⁵Zr

mass number	95
neutron number	55
relative atomic mass	94.908040276 ± 0.000000933 Da
g-factor	0.452 ± 0.008
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	64.032 ± 0.006 d
spin	5/2
nuclear quadrupole moment	0.22 ± 0.02
dydhyas diskudhans	1946
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

⁹⁶Zr

mass number	96
neutron number	56
relative atomic mass	95.908277615 ± 0.000000122 Da
g-factor	0
natural abundance	2.8 ± 0.02
radioactivity	☢️ elven radyoweythresek
half-life	23.4 ± 1.7 Ey
spin	0
nuclear quadrupole moment	0
dydhyas diskudhans	1934
parity	+

decay mode	intensity
2β⁻ (double β⁻ decay)	100%

⁹⁷Zr

mass number	97
neutron number	57
relative atomic mass	96.910963802 ± 0.00000013 Da
g-factor	-1.872 ± 0.01
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	16.749 ± 0.008 h
spin	1/2
nuclear quadrupole moment	0
dydhyas diskudhans	1951
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

⁹⁸Zr

mass number	98
neutron number	58
relative atomic mass	97.912740448 ± 0.000009065 Da
g-factor	0
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	30.7 ± 0.4 s
spin	0
nuclear quadrupole moment	0
dydhyas diskudhans	1967
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

⁹⁹Zr

mass number	99
neutron number	59
relative atomic mass	98.916675081 ± 0.000011271 Da
g-factor	-1.858 ± 0.008
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	2.1 ± 0.1 s
spin	1/2
nuclear quadrupole moment	0
dydhyas diskudhans	1970
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁰⁰Zr

mass number	100
neutron number	60
relative atomic mass	99.918010499 ± 0.000008742 Da
g-factor	0
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	7.1 ± 0.4 s
spin	0
nuclear quadrupole moment	0
dydhyas diskudhans	1970
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁰¹Zr

mass number	101
neutron number	61
relative atomic mass	100.921458454 ± 0.000008944 Da
g-factor	-0.18133333333333 ± 0.0053333333333333
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	2.29 ± 0.08 s
spin	3/2
nuclear quadrupole moment	0.81 ± 0.06
dydhyas diskudhans	1972
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁰²Zr

mass number	102
neutron number	62
relative atomic mass	101.923154181 ± 0.000009401 Da
g-factor	0
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	2.01 ± 0.08 s
spin	0
nuclear quadrupole moment	0
dydhyas diskudhans	1970
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁰³Zr

mass number	103
neutron number	63
relative atomic mass	102.927204054 ± 0.0000099 Da
g-factor
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	1.38 ± 0.07 s
spin	5/2
nuclear quadrupole moment
dydhyas diskudhans	1987
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	1%

¹⁰⁴Zr

mass number	104
neutron number	64
relative atomic mass	103.929449193 ± 0.00001 Da
g-factor	0
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	920 ± 28 ms
spin	0
nuclear quadrupole moment	0
dydhyas diskudhans	1990
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	1%

¹⁰⁵Zr

mass number	105
neutron number	65
relative atomic mass	104.934021832 ± 0.000013 Da
g-factor
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	670 ± 28 ms
spin	1/2
nuclear quadrupole moment	0
dydhyas diskudhans	1992
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	2%

¹⁰⁶Zr

mass number	106
neutron number	66
relative atomic mass	105.93693 ± 0.000215 Da
g-factor	0
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	179 ± 6 ms
spin	0
nuclear quadrupole moment	0
dydhyas diskudhans	1994
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	7%

¹⁰⁷Zr

mass number	107
neutron number	67
relative atomic mass	106.942007 ± 0.000322 Da
g-factor
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	145.7 ± 2.4 ms
spin	5/2
nuclear quadrupole moment
dydhyas diskudhans	1994
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	23%

¹⁰⁸Zr

mass number	108
neutron number	68
relative atomic mass	107.945303 ± 0.000429 Da
g-factor	0
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	78.5 ± 2 ms
spin	0
nuclear quadrupole moment	0
dydhyas diskudhans	1997
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

¹⁰⁹Zr

mass number	109
neutron number	69
relative atomic mass	108.950907 ± 0.000537 Da
g-factor
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	56 ± 3 ms
spin	5/2
nuclear quadrupole moment
dydhyas diskudhans	1997
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

¹¹⁰Zr

mass number	110
neutron number	70
relative atomic mass	109.954675 ± 0.000537 Da
g-factor	0
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	37.5 ± 2 ms
spin	0
nuclear quadrupole moment	0
dydhyas diskudhans	1997
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

¹¹¹Zr

mass number	111
neutron number	71
relative atomic mass	110.960837 ± 0.000644 Da
g-factor
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	24 ± 0.5 ms
spin	5/2
nuclear quadrupole moment
dydhyas diskudhans	2010
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

¹¹²Zr

mass number	112
neutron number	72
relative atomic mass	111.965196 ± 0.000751 Da
g-factor	0
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life	43 ± 21 ms
spin	0
nuclear quadrupole moment	0
dydhyas diskudhans	2010
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

¹¹³Zr

mass number	113
neutron number	73
relative atomic mass	112.971723 ± 0.000322 Da
g-factor
natural abundance
radioactivity	☢️ elven radyoweythresek
half-life
spin	3/2
nuclear quadrupole moment
dydhyas diskudhans	2018
parity	+

decay mode	intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

istori

diskudher po dismyger	Martin Klaproth
location of discovery	Germany
dydhyas diskudhans	1789
Etymologyl	From the mineral, zircon.
pronunciation	zer-KO-ni-em (en)

source

Abundance
Abundance in Earth's crust	165 mg/kg
natural abundance (Keynvor)	0.00003 mg/L
natural abundance (Korf)	0.000005 %
natural abundance (meteoroid)	0.00066 %
natural abundance (Howl)	0.000004 %
Abundance in Universe	0.000005 %

Nuclear Screening Constants

1	s	0.841
2	p	4.0072
2	s	10.6262
3	d	14.4331
3	p	16.1545
3	s	15.6385
4	d	26.9284
4	p	26.54
4	s	25.0984
5	s	33.5545

Zerconyum on ChemicalAid

Art & Architecture Thesaurus ID	300380041
Australian Educational Vocabulary ID	scot/3602
BNCF Thesaurus ID	20970
Bibliothèque nationale de France ID	119820825
Brockhaus Enzyklopädie online ID	zirkonium
CAB ID	281356
CAS Registry Number	7440-67-7
CPV Supplementary	AA18
ChEBI ID	33342
ChemSpider ID	22431
Common Procurement Vocabulary	14735000
DSSTOX compound identifier	DTXCID4029777
DSSTox substance ID	DTXSID0049818
DeCS ID	15435
Den Store Danske ID	zirconium
Den Store Danske ID	zirkonium
ECHA Substance Infocard ID	100.028.342
Elhuyar ZTH ID	032289
Encyclopedia of China (Third Edition) ID	190946
Encyclopædia Britannica Online ID	science/zirconium
Encyclopædia Universalis ID	zirconium-et-hafnium
Freebase ID	/m/025sqzx
French Vikidia ID	Zirconium
Gran Enciclopèdia Catalana ID	0152112
Great Russian Encyclopedia Online ID	4677871
HCIS ID	4745
HSDB ID	2528
Human Metabolome Database ID	HMDB0001475
ICSC ID	1405
IEDB Epitope ID	114077
InChI	InChI=1S/Zr
InChIKey	QCWXUUIWCKQGHC-UHFFFAOYSA-N
KBpedia ID	Zirconium
Library of Congress authority ID	sh85149899
MeSH descriptor ID	D015040
NDL Authority ID	00574852
NE.se ID	zr
NKCR AUT ID	ph675049
National Library of Israel J9U ID	987007534255505171
OmegaWiki Defined Meaning	371224
OpenAlex ID	C534791751
PSH ID	5761
PubChem CID	23995
RxNorm ID	1534771
ScienceDirect topic ID	engineering/zirconium-zr
ScienceDirect topic ID	chemical-engineering/zirconium
Store norske leksikon ID	zirkonium
Treccani ID	zirconio
UNII	C6V6S92N3C
USGS Thesaurus ID	1619
WordNet 3.1 Synset ID	14686460-n
YSO ID	13893
ZVG number	7400
ZVG number	520040
honanieth GND	4190943-4

Zerconyum (Zr)

Physical Property

Chemical Property

other

Isotopes of Zirconium

77Zr

78Zr

79Zr

80Zr

81Zr

82Zr

83Zr

84Zr

85Zr

86Zr

87Zr

88Zr

89Zr

90Zr

91Zr

92Zr

93Zr

94Zr

95Zr

96Zr

97Zr

98Zr

99Zr

100Zr

101Zr

102Zr

103Zr

104Zr

105Zr

106Zr

107Zr

108Zr

109Zr

110Zr

111Zr

112Zr

113Zr

istori

source

Nuclear Screening Constants

⁷⁷Zr

⁷⁸Zr

⁷⁹Zr

⁸⁰Zr

⁸¹Zr

⁸²Zr

⁸³Zr

⁸⁴Zr

⁸⁵Zr

⁸⁶Zr

⁸⁷Zr

⁸⁸Zr

⁸⁹Zr

⁹⁰Zr

⁹¹Zr

⁹²Zr

⁹³Zr

⁹⁴Zr

⁹⁵Zr

⁹⁶Zr

⁹⁷Zr

⁹⁸Zr

⁹⁹Zr

¹⁰⁰Zr

¹⁰¹Zr

¹⁰²Zr

¹⁰³Zr

¹⁰⁴Zr

¹⁰⁵Zr

¹⁰⁶Zr

¹⁰⁷Zr

¹⁰⁸Zr

¹⁰⁹Zr

¹¹⁰Zr

¹¹¹Zr

¹¹²Zr

¹¹³Zr