Fransium (Fr)

chemical element with symbol Fr and atomic number 87

Atomic Number	87
Atomic Weight	223
Massagetal	197

Group	1
Period	7
Block	s

proton	87 p⁺
neutron	110 n⁰
elektron	87 e^-

Physical Property

Atoomradius	258 pm
molar volume
Covalent Radius	223 pm 218 pm 260 pm
Metallic Radius
Ioonradius	180 pm
Crystal Radius	194 pm
Van der Waals radius	348 pm 364 pm 348 pm 490 pm
density	1,87 g/cm³

Chemical Property

energie

proton affinity
electron affinity	0,486 eV/particle
ionization energy	4,0727409 eV/particle 22,4 eV/particle 33 eV/particle 39,1 eV/particle 50 eV/particle 67 eV/particle 80 eV/particle 106 eV/particle 120 eV/particle 179 eV/particle 200 eV/particle 222,1 eV/particle 245 eV/particle 269 eV/particle 293 eV/particle 324 eV/particle 349 eV/particle 375 eV/particle 400 eV/particle 530 eV/particle 560 eV/particle 590 eV/particle 620 eV/particle 690 eV/particle 720 eV/particle 820 eV/particle 850 eV/particle 910 eV/particle 980 eV/particle 1 040 eV/particle 1 110 eV/particle 1 180 eV/particle 1 250 eV/particle 1 320 eV/particle 1 380 eV/particle 1 460 eV/particle 1 530 eV/particle 1 600 eV/particle 1 670 eV/particle 1 700 eV/particle 1 810 eV/particle 2 119 eV/particle 2 182 eV/particle 2 247 eV/particle 2 317 eV/particle 2 384 eV/particle 2 450 eV/particle 2 564 eV/particle 2 631 eV/particle 2 706 eV/particle 2 774 eV/particle 3 049 eV/particle 3 115 eV/particle 3 190 eV/particle 3 257 eV/particle 3 556 eV/particle 3 635 eV/particle 3 828 eV/particle 3 907 eV/particle 6 365 eV/particle 6 516 eV/particle 6 678 eV/particle 6 849 eV/particle 7 013 eV/particle 7 172 eV/particle 7 500 eV/particle 7 670 eV/particle 7 850 eV/particle 8 020 eV/particle 8 500 eV/particle 8 640 eV/particle 8 800 eV/particle 8 950 eV/particle 9 890 eV/particle 10 070 eV/particle 10 420 eV/particle 10 580 eV/particle 22 330 eV/particle 22 730 eV/particle 23 170 eV/particle 23 570 eV/particle 27 060 eV/particle 27 590 eV/particle 28 260 eV/particle 28 683,4 eV/particle 113 817,2 eV/particle 115 859 eV/particle

Verdampingswarmte
smeltingswarmte	15 kJ/mol
Vormingsentalpie
elektron

Elektronskil	2, 8, 18, 32, 18, 8, 1

Valenselektrone	1 ⓘ

elektronkonfigurasie	[Rn] 7s¹ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s¹

Oksidasietoestand	1
Elektronegatiwiteit	0.08731 0.7
Electrophilicity Index	0,7242688826969913 eV/particle
fundamental state of matter

phase of matter	Solid
gaseous state of matter
Boiling Point
Melting Point	294,15 K
critical pressure
critical temperature
triple point
appearance
kleur	Silver #ffffff #420066 #420066
appearance
Brekingsindeks
thermodynamic material property
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
type
Geleidingsvermoë
Elektriese resistiwiteit
superconductivity
Magnetisme
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Curie temperature
Néel temperature
structure
Crystal Structure	(BCC)
lattice constant
Lattice Angles
mechanical property
hardness
Massamodulus
Skuifmodulus
Young se modulus
Poisson se verhouding
Spoed van klank
classification
Category	Alkali metals, Alkali metals
CAS Group	IA
IUPAC Group	IA
Glawe Number	7
Mendeleev Number	6
Pettifor Number	7
Geochemical Class	U/Th decay series
Goldschmidt classification	synthetic

other

Gas Basicity
polarizability	317,8 ± 2,4 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
Neutron Mass Absorption
quantum number	2S1/2
Ruimtegroep	()

Isotopes of Francium

Stable Isotopes	0
Unstable Isotopes	37
Natural Isotopes	0

¹⁹⁷Fr

Massagetal	197
neutron number	110
Relative Atomic Mass	197,011008086 ± 0,000060584 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	2,3 ± 1,9 ms
spin	7/2
nuclear quadrupole moment
ontdekkingsdatum	2013
parity	-

decay mode	intensity
α (α emission)	100%

¹⁹⁸Fr

Massagetal	198
neutron number	111
Relative Atomic Mass	198,010282081 ± 0,000033419 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	15 ± 3 ms
spin	3
nuclear quadrupole moment
ontdekkingsdatum	2013
parity	+

decay mode	intensity
α (α emission)	100%

¹⁹⁹Fr

Massagetal	199
neutron number	112
Relative Atomic Mass	199,007269384 ± 0,000014734 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	6,6 ± 2,2 ms
spin	1/2
nuclear quadrupole moment	0
ontdekkingsdatum	1999
parity	+

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

²⁰⁰Fr

Massagetal	200
neutron number	113
Relative Atomic Mass	200,006584666 ± 0,000032769 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	47,5 ± 2,8 ms
spin	3
nuclear quadrupole moment
ontdekkingsdatum	1995
parity	+

decay mode	intensity
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
β⁺ SF (β⁺-delayed fission)

²⁰¹Fr

Massagetal	201
neutron number	114
Relative Atomic Mass	201,003852491 ± 0,000009747 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	62,8 ± 1,9 ms
spin	9/2
nuclear quadrupole moment
ontdekkingsdatum	1980
parity	-

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

²⁰²Fr

Massagetal	202
neutron number	115
Relative Atomic Mass	202,003329637 ± 0,000006476 Da
g-factor	1,3 ± 0,016666666666667
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	372 ± 12 ms
spin	3
nuclear quadrupole moment
ontdekkingsdatum	1980
parity	+

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

²⁰³Fr

Massagetal	203
neutron number	116
Relative Atomic Mass	203,000940867 ± 0,000006689 Da
g-factor	0,83111111111111 ± 0,0088888888888889
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	550 ± 10 ms
spin	9/2
nuclear quadrupole moment	-0,47 ± 0,02
ontdekkingsdatum	1967
parity	-

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

²⁰⁴Fr

Massagetal	204
neutron number	117
Relative Atomic Mass	204,000651972 ± 0,000026389 Da
g-factor	1,33 ± 0,01
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	1,75 ± 0,26 s
spin	3
nuclear quadrupole moment	-0,141 ± 0,009
ontdekkingsdatum	1964
parity	+

decay mode	intensity
α (α emission)	96%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²⁰⁵Fr

Massagetal	205
neutron number	118
Relative Atomic Mass	204,998593854 ± 0,000008399 Da
g-factor	0,84444444444444 ± 0,0066666666666667
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	3,9 ± 0,07 s
spin	9/2
nuclear quadrupole moment	-0,305 ± 0,018
ontdekkingsdatum	1964
parity	-

decay mode	intensity
α (α emission)	98.5%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	1.5%

²⁰⁶Fr

Massagetal	206
neutron number	119
Relative Atomic Mass	205,998661441 ± 0,000029856 Da
g-factor	1,3233333333333 ± 0,016666666666667
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd
spin	3
nuclear quadrupole moment	-0,354 ± 0,009
ontdekkingsdatum	1964
parity	+

decay mode	intensity
α (α emission)	88.4%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	11.6%

²⁰⁷Fr

Massagetal	207
neutron number	120
Relative Atomic Mass	206,99694145 ± 0,000018847 Da
g-factor	0,86 ± 0,0088888888888889
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	14,8 ± 0,1 s
spin	9/2
nuclear quadrupole moment	-0,24 ± 0,02
ontdekkingsdatum	1964
parity	-

decay mode	intensity
α (α emission)	95%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²⁰⁸Fr

Massagetal	208
neutron number	121
Relative Atomic Mass	207,997139082 ± 0,000012514 Da
g-factor	0,67285714285714 ± 0,0057142857142857
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	59,1 ± 0,3 s
spin	7
nuclear quadrupole moment	0,052 ± 0,011
ontdekkingsdatum	1964
parity	+

decay mode	intensity
α (α emission)	89%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	11%

²⁰⁹Fr

Massagetal	209
neutron number	122
Relative Atomic Mass	208,995939701 ± 0,000012349 Da
g-factor	0,87333333333333 ± 0,011111111111111
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	50,5 ± 0,7 s
spin	9/2
nuclear quadrupole moment	-0,26 ± 0,02
ontdekkingsdatum	1964
parity	-

decay mode	intensity
α (α emission)	89%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	11%

²¹⁰Fr

Massagetal	210
neutron number	123
Relative Atomic Mass	209,996410596 ± 0,000014407 Da
g-factor	0,73 ± 0,0083333333333333
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	3,18 ± 0,06 m
spin	6
nuclear quadrupole moment	0,21 ± 0,02
ontdekkingsdatum	1964
parity	+

decay mode	intensity
α (α emission)	71%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²¹¹Fr

Massagetal	211
neutron number	124
Relative Atomic Mass	210,995555189 ± 0,000012872 Da
g-factor	0,88222222222222 ± 0,011111111111111
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	3,1 ± 0,02 m
spin	9/2
nuclear quadrupole moment	-0,21 ± 0,02
ontdekkingsdatum	1964
parity	-

decay mode	intensity
α (α emission)	87%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	13%

²¹²Fr

Massagetal	212
neutron number	125
Relative Atomic Mass	211,99622542 ± 0,000009419 Da
g-factor	0,918 ± 0,01
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	20 ± 0,6 m
spin	5
nuclear quadrupole moment	-0,1 ± 0,002
ontdekkingsdatum	1950
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	57%
α (α emission)	43%

²¹³Fr

Massagetal	213
neutron number	126
Relative Atomic Mass	212,99618441 ± 0,000005053 Da
g-factor	0,88666666666667 ± 0,0022222222222222
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	34,14 ± 0,06 s
spin	9/2
nuclear quadrupole moment	-0,138 ± 0,003
ontdekkingsdatum	1964
parity	-

decay mode	intensity
α (α emission)	99.44%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	0.56%

²¹⁴Fr

Massagetal	214
neutron number	127
Relative Atomic Mass	213,998971193 ± 0,000009145 Da
g-factor	0,241 ± 0,016
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	5,51 ± 0,13 ms
spin	1
nuclear quadrupole moment
ontdekkingsdatum	1967
parity	-

decay mode	intensity
α (α emission)	100%

²¹⁵Fr

Massagetal	215
neutron number	128
Relative Atomic Mass	215,000341534 ± 0,000007585 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	90 ± 4 ns
spin	9/2
nuclear quadrupole moment
ontdekkingsdatum	1970
parity	-

decay mode	intensity
α (α emission)	100%

²¹⁶Fr

Massagetal	216
neutron number	129
Relative Atomic Mass	216,003189523 ± 0,00000448 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	700 ± 20 ns
spin	1
nuclear quadrupole moment
ontdekkingsdatum	1970
parity	-

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

²¹⁷Fr

Massagetal	217
neutron number	130
Relative Atomic Mass	217,00463198 ± 0,000007011 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	22 ± 5 us
spin	9/2
nuclear quadrupole moment
ontdekkingsdatum	1968
parity	-

decay mode	intensity
α (α emission)	100%

²¹⁸Fr

Massagetal	218
neutron number	131
Relative Atomic Mass	218,00757862 ± 0,000004546 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	1,4 ± 0,5 ms
spin	1
nuclear quadrupole moment
ontdekkingsdatum	1949
parity	-

decay mode	intensity
α (α emission)	100%

²¹⁹Fr

Massagetal	219
neutron number	132
Relative Atomic Mass	219,009250664 ± 0,00000738 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	22,5 ± 1,7 ms
spin	9/2
nuclear quadrupole moment	-1,19 ± 0,02
ontdekkingsdatum	1948
parity	-

decay mode	intensity
α (α emission)	100%

²²⁰Fr

Massagetal	220
neutron number	133
Relative Atomic Mass	220,012326789 ± 0,000004324 Da
g-factor	-0,66 ± 0,01
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	27,4 ± 0,3 s
spin	1
nuclear quadrupole moment	0,487 ± 0,008
ontdekkingsdatum	1948
parity	+

decay mode	intensity
α (α emission)	100%
β⁻ (β⁻ decay)	0.35%

²²¹Fr

Massagetal	221
neutron number	134
Relative Atomic Mass	221,014253714 ± 0,000005245 Da
g-factor	0,628 ± 0,008
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	4,801 ± 0,005 m
spin	5/2
nuclear quadrupole moment	-1,02 ± 0,03
ontdekkingsdatum	1947
parity	-

decay mode	intensity
α (α emission)	100%
β⁻ (β⁻ decay)	0.0048%
14C	8.8%

²²²Fr

Massagetal	222
neutron number	135
Relative Atomic Mass	222,017582615 ± 0,000008 Da
g-factor	0,315 ± 0,005
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	14,2 ± 0,3 m
spin	2
nuclear quadrupole moment	0,51 ± 0,04
ontdekkingsdatum	1975
parity	-

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

²²³Fr

Massagetal	223
neutron number	136
Relative Atomic Mass	223,019734241 ± 0,000002073 Da
g-factor	0,77333333333333 ± 0,0066666666666667
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	22 ± 0,07 m
spin	3/2
nuclear quadrupole moment	1,18 ± 0,02
ontdekkingsdatum	1939
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
α (α emission)	0.006%

²²⁴Fr

Massagetal	224
neutron number	137
Relative Atomic Mass	224,023348096 ± 0,000012 Da
g-factor	0,4 ± 0,01
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	3,33 ± 0,1 m
spin	1
nuclear quadrupole moment	0,523 ± 0,009
ontdekkingsdatum	1969
parity	-

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

²²⁵Fr

Massagetal	225
neutron number	138
Relative Atomic Mass	225,025572466 ± 0,000012847 Da
g-factor	0,70666666666667 ± 0,0066666666666667
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	3,95 ± 0,14 m
spin	3/2
nuclear quadrupole moment	1,33 ± 0,02
ontdekkingsdatum	1969
parity	-

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

²²⁶Fr

Massagetal	226
neutron number	139
Relative Atomic Mass	226,029544512 ± 0,000006688 Da
g-factor	0,0712 ± 0,0014
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	48,5 ± 0,7 s
spin	1
nuclear quadrupole moment	-1,37 ± 0,03
ontdekkingsdatum	1969
parity	-

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

²²⁷Fr

Massagetal	227
neutron number	140
Relative Atomic Mass	227,031865413 ± 0,000006332 Da
g-factor	2,98 ± 0,04
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	2,47 ± 0,03 m
spin	1/2
nuclear quadrupole moment	0
ontdekkingsdatum	1972
parity	+

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

²²⁸Fr

Massagetal	228
neutron number	141
Relative Atomic Mass	228,035839433 ± 0,000007226 Da
g-factor	-0,38 ± 0,005
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	38 ± 1 s
spin	2
nuclear quadrupole moment	2,41 ± 0,06
ontdekkingsdatum	1972
parity	-

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

²²⁹Fr

Massagetal	229
neutron number	142
Relative Atomic Mass	229,038291443 ± 0,000005368 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	50,2 ± 0,4 s
spin	1/2
nuclear quadrupole moment	0
ontdekkingsdatum	1975
parity	+

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

²³⁰Fr

Massagetal	230
neutron number	143
Relative Atomic Mass	230,042390787 ± 0,000007022 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	19,1 ± 0,5 s
spin	2
nuclear quadrupole moment
ontdekkingsdatum	1987
parity	+

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

²³¹Fr

Massagetal	231
neutron number	144
Relative Atomic Mass	231,045175353 ± 0,0000083 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	17,6 ± 0,6 s
spin	1/2
nuclear quadrupole moment	0
ontdekkingsdatum	1985
parity	+

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

²³²Fr

Massagetal	232
neutron number	145
Relative Atomic Mass	232,049461219 ± 0,000015 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	5,5 ± 0,6 s
spin	5
nuclear quadrupole moment
ontdekkingsdatum	1990
parity

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ SF (β⁻-delayed fission)

²³³Fr

Massagetal	233
neutron number	146
Relative Atomic Mass	233,052517833 ± 0,000021 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	900 ± 100 ms
spin	1/2
nuclear quadrupole moment	0
ontdekkingsdatum	2010
parity	+

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

geskiedenis

Ontdek deur	Marguerite Derey
ligging van ontdekking	France
ontdekkingsdatum	1939
etimologie	Named for France, the nation of its discovery.
uitspraak	FRAN-si-em (Engels)

source

Abundance
Abundance in Earth's crust
natural abundance (oseaan)
natural abundance (human body)	0 %
natural abundance (Meteoroïde)
natural abundance (Son)
Abundance in Universe	0 %

Nuclear Screening Constants

Fransium on ChemicalAid

Australian Educational Vocabulary ID	scot/3521
Brockhaus Enzyklopädie online ID	francium
CAS Registry Number	7440-73-5
ChEBI ID	33323
ChemSpider ID	4886484
DSSTOX compound identifier	DTXCID20147885
DSSTox substance ID	DTXSID20225394
Den Store Danske ID	francium
Elhuyar ZTH ID	024312
Encyclopædia Britannica Online ID	science/francium
Encyclopædia Universalis ID	francium
Freebase-kode	/m/025rqcb
French Vikidia ID	Francium
GND ID	4155153-9
Gran Enciclopèdia Catalana ID	0110219
Gran Enciclopèdia Catalana ID	0027925
Great Russian Encyclopedia Online ID	4735985
InChI	InChI=1S/Fr
InChIKey	KLMCZVJOEAUDNE-UHFFFAOYSA-N
KBpedia ID	Francium
LCCN	sh85051541
MeSH descriptor ID	D005605
NE.se ID	francium
National Library of Israel J9U ID	987007550763805171
OmegaWiki Defined Meaning	159016
PSH ID	5749
PubChem CID	6328145
Quora topic ID	Francium
Store norske leksikon ID	francium
Treccani ID	francio
UNII	15TEQ7D2QF
USGS Thesaurus ID	1457
WordNet 3.1 Synset ID	14662042-n

Fransium (Fr)

Physical Property

Chemical Property

other

Isotopes of Francium

197Fr

198Fr

199Fr

200Fr

201Fr

202Fr

203Fr

204Fr

205Fr

206Fr

207Fr

208Fr

209Fr

210Fr

211Fr

212Fr

213Fr

214Fr

215Fr

216Fr

217Fr

218Fr

219Fr

220Fr

221Fr

222Fr

223Fr

224Fr

225Fr

226Fr

227Fr

228Fr

229Fr

230Fr

231Fr

232Fr

233Fr

geskiedenis

source

Nuclear Screening Constants

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