Thorium tetrafluoride

Thorium(IV) fluoride

Identifiers

CAS Number

* 13709-59-6

3D model (JSmol)

* Interactive image

EC Number |

* 237-259-6

PubChem CID

* 83680

InChI

* InChI=1S/4FH.Th/h4*1H;/q;;;;+4/p-4

SMILES

* F[Th](F)(F)F

Properties

Chemical formula

| ThF4
Molar mass | 308.03 g/mol
Appearance  | white crystals
Density | 6.3 g/cm3
Melting point |  1,110 °C (2,030 °F; 1,380 K)
Boiling point |  1,680 °C (3,060 °F; 1,950 K)

Refractive index (nD)

| 1.56
Structure

Crystal structure

| Monoclinic, mS60

Space group

| C12/c1, No. 15
Hazards
Flash point | Non-flammable
Related compounds

Other anions

| Thorium(IV) chloride
Thorium(IV) bromide
Thorium(IV) iodide

Other cations

| Protactinium(IV) fluoride
Uranium(IV) fluoride
Neptunium(IV) fluoride
Plutonium(IV) fluoride

Related compounds

| Thorium dioxide

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Y verify (what is YN ?)
Infobox references

Thorium(IV) fluoride (ThF4) is an inorganic chemical compound. It is a white hygroscopic powder which can be produced by reacting thorium with fluorine gas. At temperatures above 500 °C, it reacts with atmospheric moisture to produce ThOF2.[1]

## Uses

Despite its (mild) radioactivity, thorium fluoride is used as an antireflection material in multilayered optical coatings. It has excellent optical transparency in the range 0.35–12 µm, and its radiation is primarily due to alpha particles, which can be easily stopped by a thin cover layer of another material.[2][3] However, like all alpha emitters, thorium is potentially hazardous if incorporated, which means safety should focus on reducing or eliminating this danger. In addition to its radioactivity, thorium is also a chemically toxic heavy metal.

Thorium fluoride was used[when?] in making carbon arc lamps, which provided high-intensity illumination for movie projectors and search lights.[4][5]

## See also

* Liquid fluoride thorium reactor

## References

1. ↑ Dale L. Perry, Sidney L. Phillips (1995). Handbook of inorganic compounds. CRC Press. p. 412. ISBN 0-8493-8671-3. https://books.google.com/books?id=0fT4wfhF1AsC&pg=PA412.
2. ↑ James D. Rancourt (1996). Optical thin films: user handbook. SPIE Press. p. 196. ISBN 0-8194-2285-1. https://books.google.com/books?id=_VsEiRoFnXcC&pg=PA196.
3. ↑ W. Heitmann and E. Ritter (1968). "Production and properties of vacuum evaporated films of thorium fluoride". Appl. Opt. 7 (2): 307–9. doi:10.1364/AO.7.000307. PMID 20062461. Bibcode: 1968ApOpt...7..307H. http://www.opticsinfobase.org/abstract.cfm?URI=ao-7-2-307.
4. ↑ McKetta, John J. (1996). Encyclopedia of Chemical Processing and Design: Thermoplastics to Trays, Separation, Useful Capacity. CRC Press. p. 81. ISBN 0-8247-2609-X. https://books.google.com/books?id=ahNFGR1jMB4C&pg=PA81.
5. ↑ Thorium tetrafluoride International Bio-Analytical Industries, Inc.

* v
* t
* e

Thorium compounds

Th(II)|

* ThO

Th(IV)|

* ThO2
* Th(OH)4
* ThC
* ThCl4
* ThF4
* ThI4
* ThSiO4
* Th(C2O4)2
* ThS2
* Th(NO3)4
* Th(C8H8)2

* v
* t
* e

Fluorine compounds

| HF |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | He

|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|

LiF | BeF2 |  |  |  |  |  |  |  |  |  |  | BF3
B2F4 | CF4 | NF3 | OF2 | F− | Ne
NaF | MgF2 |  |  |  |  |  |  |  |  |  |  | AlF3 | SiF4 | PF3
PF5 | SF2
SF4
SF6 | ClF
ClF3
ClF5 | Ar
KF | CaF2 | ScF3 | TiF3
TiF4 | VF3
VF4
VF5 | CrF2
CrF3
CrF4
CrF5 | MnF2
MnF3 | FeF2
FeF3 | CoF2
CoF3 | NiF2 | CuF
CuF2 | ZnF2 | GaF3 | GeF4 | AsF3
AsF5 | SeF4
SeF6 | BrF3
BrF5 | KrF2
RbF | SrF2 | YF3 | ZrF4 | NbF4
NbF5 | MoF5
MoF6 | TcF6 | RuF3
RuF4
RuF5
RuF6 | RhF6 | PdF2 | AgF
AgF2
Ag2F | CdF2 | InF3 | SnF2
SnF4 | SbF3
SbF5 | TeF4 | IF
IF3
IF5
IF7 | XeF2
XeF4
XeF6
CsF | BaF2 | *  | HfF4 | TaF5 | WF4
WF6 | ReF4
ReF5
ReF6
ReF7 | OsF4
OsF5
OsF6 | IrF3
IrF5
IrF6 | PtF4
PtF6 | AuF3
Au2F10
AuF5·F2
| HgF2
Hg2F2 | TlF
TlF3 | PbF2
PbF4 | BiF3
BiF5 | Po | At | RnF2
Fr | Ra | **  | Rf | Db | Sg | Bh | Hs | Mt | Ds | Rg | Cn | Nh | Fl | Mc | Lv | Ts | Og
|  | ↓ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| * | LaF3 | CeF3 | Pr | NdF3 | PmF3 | SmF3
| Eu | Gd | Tb | DyF3 | Ho | Er | Tm | YbF3
| Lu |
| ** | AcF3 | ThF4 | Pa | UF3
UF4
UF5
UF6 | NpF3
NpF4
NpF5
NpF6
| PuF3
PuF4
PuF5
PuF6 | AmF3
AmF4 | CmF3 | Bk | Cf | Es | Fm | Md | No | Lr |

Other|

* AgBF4
* AgPF6
* Cs2AlF5
* K3AlF6
* Na3AlF6
* KAsF6
* LiAsF6
* NaAsF6
* HBF4
* KBF4
* LiBF4
* NaBF4
* RbBF4
* Ba(BF4)2
* Ni(BF4)2
* Pb(BF4)2
* Sn(BF4)2
* BaClF
* BaSiF6
* BaGeF6
* BrOF3
* BrO2F
* CBrF3
* CBr2F2
* CBr3F
* CClF3
* CCl2F2
* CCl3F
* CFN
* CF2O
* CF3I
* CHF3
* CH2F2
* CH3F
* C2Cl3F3
* C2H3F
* C6H5F
* C7H5F3
* C15F33N
* ClFO2
* CrFO4
* CrF2O2
* CsBF4
* NH4F
* FNO
* FNO2
* FNO3
* KHF2
* NaHF2
* ThOF2
* NH5F2
* (NH4)2SiF6
* F2OS
* F3OP
* PSF3
* HPF6
* HSbF6
* NH4PF6
* KPF6
* KSbF6
* LiPF6
* NaPF6
* NaSbF6
* Na2SiF6
* Na2TiF6
* Na2ZrF6
* TlPF6
* IOF3
* K2NbF7
* K2TaF7
* IO3F
* UO2F2

Chemical formulas

0.00

(0 votes)

|

Retrieved from "https://handwiki.org/wiki/index.php?title=Chemistry:Thorium_tetrafluoride&oldid=3870072"
*[CID]: Compound ID
*[v]: View this template
*[t]: Discuss this template
*[e]: Edit this template