Chemistry:Californium(II) iodide

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Californium(II) iodide
Names
Other names
Californium diiodide
Identifiers
3D model (JSmol)
Properties
CfI2
Molar mass 505 g·mol−1
Appearance dark purple solid
Density g/cm3
insoluble
Structure
cubic
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Californium(II) iodide is a binary inorganic compound of californium and iodine with the formula CfI2.[1]

Synthesis

It can be produced by reducing californium triiodide with hydrogen in a quartz thin tube at 570 °C:[2]

2CfI
3
+ H
2
→ 2CfI
2
+ 2HI

Physical properties

The compound forms a dark purple solid. At slightly higher temperatures, it melts and reacts with the silica in the thin tube, producing CfOI.[citation needed]

Californium diiodide has two crystal structures, one is CdCl2-type crystal structure, stable at room temperature, with lattice parameters a = 743.4 ± 1.1 pm and α = 35.83 ± 0.07°; the other is metastable, of CdI2-type with lattice parameters a = 455.7 ± 0.4 pm and c = 699.2 ± 0.6 pm.[3] Californium diiodide has an absorption band in the wavelength range from 300 to 1100 nm, which proves the existence of Cf(II).[4]

References

HI He
LiI BeI2 BI3 CI4 NI3 I2O4,
I2O5,
I4O9
IF,
IF3,
IF5,
IF7
Ne
NaI MgI2 AlI3 SiI4 PI3,
P2I4
S ICl,
ICl3
Ar
KI CaI2 Sc TiI4 VI3 CrI3 MnI2 FeI2 CoI2 NiI2 CuI ZnI2 Ga2I6 GeI2,
GeI4
AsI3 Se IBr Kr
RbI SrI2 YI3 ZrI4 NbI5 Mo Tc Ru Rh Pd AgI CdI2 InI3 SnI4,
SnI2
SbI3 TeI4 I Xe
CsI BaI2   HfI4 TaI5 W Re Os Ir Pt AuI Hg2I2,
HgI2
TlI PbI2 BiI3 Po AtI Rn
Fr RaI2   Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
La Ce Pr Nd Pm SmI2 Eu Gd TbI3 Dy Ho Er Tm Yb Lu
Ac ThI4 Pa UI3,
UI4
Np Pu Am Cm Bk Cf EsI3 Fm Md No Lr